stage iii operational surveillance puogran / seyen … · seyen-vear testing i.. (u) morton thiokol...
TRANSCRIPT
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Vi-A±64 288 NINUTENAN STAGE III OPERATIONAL SURVEILLANCE PUOGRAN /SEYEN-VEAR TESTING I.. (U) MORTON THIOKOL INC DRIGNANCITY UT MASATCH DIV N Rt KNIGHT DEC 85 TUR-32333
UNCLASSIFIED F426S1-6-C-SSBi F/G 21/9.2 2
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li 25 -. 16
MICROCOPY RESOLUTION TEST CHART 0.eI fIF OTI'NOADS 1963-A
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TWR-32333
00
L . Minuteman Stage III -Operational Surveillance
< Program
O Seven-Year Testing< Bondline Aging Study
December 1985
DTIC .SELECTE
FEB 14 88j
0
MORTON THIOKOL, INC._ Wasatch Operations .
RO. Box 524, Brigham City, Utah 84302 (801)863-3511
_0
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MINUTEMAN STAGE III OPERATIONAL SURVEILLANCE PROGRAM
SEVEN-YEAR TESTINGBONDLINE AGING STUDY
% -.'~,.
DECEMBER 1985
Contract F42600-86-C-0001
DELIVERY ORDER: A003 4e.-r
DTIC "5.-PREPARED BY: ELECTE,:
- ~~FEB 1 4 1986 .-..
- zMichael R. Kniht ""WMechanical Properties Section B ... .
APPROVED BY:
Dr. R. D. Taor, Supervisor Leroy e/Porte , Program Manager
Mechanical Properties Section Minute n Programs
Dr. R. L. arpnteV ManagerPropellant Development Department
. 1~
MORTON THIOKOL, INC./WASATCH OPERATIONSP. 0. BOX 524
BRIGHAM CITY, UTAH 84302
DjSt~j01qSTATEmEINr A
"AppToVed fo publo g. I ou
t" ributitm Uulimted
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W1U"
TABLE OF CONTENTS
. 1.0 Introduction.................. .. ... . ... .. .. .. .. ....
1.1 Twelve-Year Bondline Aging Study. .. .. . ............1.2 Testing/Monitoring of Motor TC 30024. .. ... . ........ 2"O1.3 Material Properties Testing of Dissected Motor 30072 .. .. ... 2
2.0 Objectives. .. .... . .................... 3 *.
2.1 Twelve-Year Bondline Aging Study and Excise Sample Testing. 32.2 Testing/Monitoring of Motor TC 30024. .. ... ......... 32.3 Material Properties Testing of Dissected Motor TC 30072 . . . 3
3.0 Summary and Conclusions .. ... . ............... 4
3.1 Twelve-Year Bondline Aging Study. .. .. ............ 4*3.2 Testing/Monitoring of Motor TC 30024. .. ... ......... 4
3.3 Material Properties Testing of Dissected Motor TC 30072 . . . 4 .. -.
m4.0 Methods .. ..... ...................... 6*4.1 Material Properties Testing .. ... . ............. 6
4.2 Twelve-Year Bondline Aging Study. .. .. . ........... 84.3 Testing/Monitoring of Motor TC 30024. .. .... . ....... 8
IL4.4 Material Properties Testing of Dissected Motor TC 30072 . . . 9
*5.0 Results. .. .... ...................... 10
5.1 Twelve-Year Bondline Aging Study .. .. . ............ 105.2 Testing/Monitoring of Motor TC 30024. .. ... ......... 115.3 Material Properties Testing of Dissected Motor TC 30072 . . .11
Accc-s!;Ion For
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* A.
ILLUSTRATIONS
Figure Page
1 Definition Flowchart for Stage III Surveillance Program. .. 13
2 Motor Segment Layout ............. ....... 14
.L 3 Effect of Storage Conditions Upon Mini DPT Bond Strength
in the Forward Flap and at the Forward Equator ... ....... 15
4 Effect of Storage Conditions Upon Liner Swell Ratio at the
Forward Flap and at the Forward Equator ................. 16
5 Effect of Storage Conditions Upon Liner Gel Fraction at* the Forward Flap and at the Forward Equator ........... .... 17
6 Effect of Storage Conditions Upon Mini DPT Bond StrengthNear the Forward Equator ...... ................. .... 187 ffc ofStorgCondtonsUon Lie SelRto Nearthe Forward Equator ....... ..................... .... 19
8 Effect of Storage Conditions Upon Liner Gel Fraction Near
the Forward Equator ........ .................... . . 20
9 Effect of Storage Conditions Upon Propellant RelaxationModulus in the Forward Flap Area ..... .............. ... 21
10 Effect of Storage Conditions Upon Propellant Relaxation i-1Modulus at the Forward Equator .... ............... .... 22
1i Mini DPT Bond Strength at Various Motor Locations ... ...... 23 L a
12 Liner Swell Ratio at Various Motor Locations ........... ... 24
*'-.13 Liner Gel Fraction at Various Motor Locations ......... ... 25
14 Liner Moisture at Various Motor Locations ............. ... 26 6
15 Motor TC 30005 Relaxation Modulus of ANB-3066 Propellant
at the Forward Equator ....... ................... .. 27
16 Motor TC 30019 Relaxation Modulus of ANB-3066 Propellant
at the Forward Equator ....... .................. ... 28 I
17 Motor TC 30033 Relaxation Modulus of ANB-3066 Propellantat the Forward Equator ....... ................... .. 29
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,VISION No TWR-32333 votSEC PAGE
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I"IILLUSTRATIONS
(CONTINUED) * __
Figure PageI ,,.
18 Shore A Hardness Gradient of ANB-3066 Propellant at theForward Equator ........ ...................... .. 30
19 Motor TC 30005 Relaxation Modulus of ANB-3066 Propellantin the Forward Flap Area ...... .................. ... 31
20 Motor TC 30019 Relaxation Modulus of ANB-3066 Propellantin the Forward Flap Area ...... .................. ... 32
21 Motor TC 30033 Relaxation Modulus of ANB-3066 Propellantin the Forward Flap Area .................. 33
22 Shore A Hardness Gradient of ANB-3066 Propellant in the
, Forward Flap, Area A . .. .. .. .. .. .. .. .. . .. 34
23 Shore A Hardness Gradient of ANB-3066 Propellant in the
- Forward Flap, Area B ....... .................... ... 35
24 Shore A Hardness Gradient of ANB-3066 Propellant in the* Forward Flap, Area C ....... .................... . 36
25 Excise Sample Diagram ... .......... ........... 37
26 Liner Bond Tensile Strength at Various Motor Locations:Motor TC 30050 Segments at the Time of Firing of MotorTC 30106 and 5.5 Years Later ..... ................ ... 38
27 Liner Gel Fraction at Various Motor Locations: MotorTC 30050 Segments at Time of Firing of Motor TC 30106and 5.5 Years Later ....... .................... ... 39
28 Liner Swell Ratio at Various Motor Locations: MotorTC 30050 Segments at Time of Firing of Motor TC 30106and 5.5 Years Later ....... .................... .. 40
29 Shore A Hardness of Bore Propellant: Motor TC 30050Segments at Time of Firing of Motor TC 30106 and 5.5Years Later ......... ....................... .... 41
30 Modulus of Mini Tensile Specimens from Bore Propellant:Motor TC 30050 Segments at Time of Firing of MotorTC 30106 and 5.5 Years Later ..... ................ ... 42
REISION N.o TWR-32333 VOL' lSEC tPAGE--
, °..ic MOE°
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ILLUSTRATIONS
(CONTINUED)
Figure Page
31 Maximum Stress of Mini Tensile Specimens from BorePropellant: Motor TC 30050 Segments at Time of Firingof Motor TC 30106 and 5.5 Years Later ... ............ 43
32 Strain at Maximum Stress of Mini Tensile Specimens from
Bore Propellant: Motor TC 30050 Segments at Time ofFiring of Motor TC 30106 and 5.5 Years Later .......... ... 44
33 Strain at Failure of Mini Tensile Specimens from BorePropellant: Motor TC 30050 Segments at Time of Firing .-.'of Motor TC 30106 and 5.5 Years Later .. .......... ... 45
34 Motor Sectioning Cuts ................... 46
35 Segment Cuts for Section 1 ..... ................. .... 47
36 Segment Cuts for Section 2 ...... .......... . 48
37 Segment Cuts for Sections 3, 4, and 5 .. ........... ... 49
38 Segment Cuts for Section 6 ..... ................. .... 50
39 Additional Cutting and Typical Marking of Section 1Segments .......... .......................... .... 51
Op 40 Mini DPT Bond Strength in Motor TC 30072 at Various
Motor Locations ......... ...................... ... 52
41 Mini DPT Bond Strength in Motor TC 30072 at VariousMotor Locations ......... ...................... 53
42 Effect of Storage Conditions Upon Liner Swell Ratio at
Various Motor Locations in Motor TC 30072 .. ......... ... 54
43 Effect of Storage Conditions Upon Liner Swell Ratio atVarious Motor Locations in Motor TC 30072 .. ......... ... 55
44 Effect of Storage Conditions Upon Mini DPT Bond StrengthNear the Aft Equator of Motor TC 30072 ............. .... 56
45 Effect of Storage Conditions Upon Liner Swell RatioNear the Aft Equator of Motor TC 30072 ............. .... 57
DOC.
SIC. PAGE' C I iv
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5 ILLUSTRATIONS(CONTINUED)
Figure Page
46 Mini DPT Bond Strength at Various Motor Locations inMotor TC 30072 ........ ....................... .... 58
"" 47 Liner Swell Ratio at Various Motor Locations in Motor ,..,2.TC 30072 ......... .... ..................... .... 59
- 48 Liner Gel Fraction at Various Motor Locations in MotorTC 30072 ........... .......................... ... 60
49 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propellant at the Forward Flap Area. ............. 61
" 50 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066i' Propellant in the Barrel Area, Between Grounding Straps. . . 62
. 51 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propellant in the Barrel Area, Under Grounding Straps. . . . 63 .-.
52 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propellant at the Forward Nipple Area .... ........... ... 64
53 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066" Propellant at the Forward Equator, Area A ............. ... 65
54 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066 .-.Propellant at the Forward Equator, Area B ............. ... 66
55 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propellant at the Forward Equator, Area C. . .. .. .". .... 67
56 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066
Propellant at the Aft Equator, Area A .... ........... ... 68
. 57 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propelalnt at the Aft Equator, Area B... . . . . . . . . . . 69
58 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propellant at the Aft Equator, Area C .... ............ ... 70
59 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066
Propellant at the Aft Flap, Area D ............. 71
DOC_ism" o. TWR-32333 VOL
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ILLUSTRATIONS(CONTINUED)
Figure Page
60 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propellant at the Aft Flap, Area E. .............. 72
61 Motor TC 30072 Relaxation Modulus Gradient of ANB-3066Propellant at the Aft Flap, Area F. .......... ... 73
62 Motor TC 30072 Liner C0O/C-C (Vinyl and Stretching)Absorbance Ratios at Various Motor Locations. .........74
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DOCREVISION NO. VOL333
SEC PAWI vi
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II TABLESTable Page
1 Segment Usage by Test Date ....... .................. ... 75
I 2 Matrix for Minuteman Stage III Bondline Aging Program ........ 763 Motor TC 30005 Material Properties Data, Forward Equator
Area, Segment 2L2, 7-Year (1985) Results ... .......... ... 78
4 Motor TC 30019 Material Properties Data, Forward EquatorP Area, Segment 2L2, 7-Year (1985) Results ......... .. .... 79
5 Motor TC 30033 Material Properties Data, Forward Equator -Area, Segment 2L2, 7-Year (1985) Results ........... . .-.-. "80
6 Motor TC 30005 Stress Relaxation Gradient, ANB-3066 Propellant,Forward Equator Area, Ambient, Segment 2L2, 7-Year (1985)Results ........... ............................ ... 81 '- -
7 Motor TC 30019 Stress Relaxation Gradient, ANB-3066 Propellant,Forward Equator Area, Ambient, Segment 2L2, 7-Year (1985) d'.Results ........... ............................ ... 82
8 Motor TC 30033 Stress Relaxation Gradient, ANB-3066 Propellant,Forward Equator Area, Ambient, Segment 2L2, 7-Year (1985)Results ........... ............................ ... 83
9 Propellant Shore A Hardness, 15-Second Readings, Forward Flap
Area, Segment 1B6, Area A, 7-Year (1985) Results ......... ... 84
10 Propellant Shore A Hardness, 15-Second Readings, Forward Flap
,- Area, Segment 1B6, Area B, 7-Year (1985) Results ........ ... 85 4.
11 Propellant Shore A Hardness, 15-Second Readings, Forward Flap *---*r . Area, Segment 1B6, Area C, 7-Year (1985) Results ......... ... 86
12 V-45 Rubber Material Properties Data, Forward Flap Area,
Segment 1B6, 7-Year (1985) Results ..... .............. ... 87
13 Motor TC 30005 Material Properties Data 7-Year (1985)
Results .............. ........................... 88
14 Motor TC 30019 Material Properties Data 7-Year (1985)
Results ............. ............................ 89.'.
Nev.,O._ No. TWR-32333 voL. -
SEC PAGEvii
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TABLES
Table Page
15 Motor TC 30033 Material Properties Data 7-Year (1985)Results .......... ........................... .... 90
16 Motor TC 30005 Liner Penetrometer Data, Forward EquatorProfile, Segment 2L2, 10-Sec Readings, 76°F, 7-Year (1985) . 91
" 17 Motor TC 30019 Liner penetrometer Data, Forward EquatorProfile, Segment 2L2, 10-Sec Readings, 76°F, 7-Year (1985)Results .......... ........................... .... 92
18 Motor TC 30033 Liner Penetrometer Data, Forward EquatorProfile, Segment 2L2, 10-Sec Readings, 76°F, 7-Year (1985)Results .......... ........................... .... 93
19 Motor TC 30005 Stress Relaxation Gradient, ANB-3066Propellant, Forward Flap Area, Ambient, Individual Results,Segment 1B6, 7-Year (1985) Results .... ............ . .. 94
20 Motor TC 30019 Stress Relaxation Gradient, ANB-3066Propellant, Forward Flap Area, Ambient, Individual Results,Segment IB6, 7-Year (1985) Results .... ............. ... 95
21 Motor TC 30033 Stress Relaxation Gradient, ANB-3066Propellant, Forward Flap Area, Ambient, Individual Results,Segment 1B6, 7-Year (1985) Results .... ............. ... 96
22 Propellant Shore A Hardness, 15-Second Readings, ForwardEquator Area, Segment 2L2, 7-Year (1985) Results ........ ... 97
23 Matrix for Surveillance Testing of Stage III MinutemanMotor TC 30024 ........... ....................... 98
24 Material Properties of SAT-Conditioned Motor TC 30050Segments: Stored with Motor TC 30024, Test at 2-YearIntervals .......... .......................... .... 99
25 Mini DPT Bond Strength Profile of Motor TC 30050 SATSegments at Firing of Motor TC 30106 and 5.5 Years Later . 100
26 Liner Gel Fraction and Swell Ratio Profiles of Motor TC 30050
SAT Segments at Firing of Motor TC 30106 and 5.5 YearsLater ........... ............................ ... 102
REVISION No TWR-32333 VOLSEC G viii
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TABLES
(CONTINUED) XA.
Table Page
27 Bore Propellant Mini Tensile and Shore A Gradients ofMotor TC 30050 SAT Segments at Firing of Motor TC 30106and 5.5 Years Later ........ ..................... .. 104
28 Dissected Motor TC 30072 Segment Test Dates . .-. '..... .. 105
29 Material Properties Testing of Dissected Operational MotorSegments ........... ........................... ... 106 . -
30 Material Property Tests for Dissected Motor Segments ....... 107
31 Material Properties (Baseline Tests Only) of Segments
from Dissected Motor ........ ...................... 108
32 Motor TC 30072 Bond Strength and Liner Properties in Forward
Nipple and Forward Flap Areas, 2-Year (1985) Results ....... 109
33 Motor TC 30072 Bond Strength and Liner Properties in ForwardEquator Area, Segment 2L, Between Grounding Straps, 2-Year ..-(1985) Results ........... ........................ 110
34 Motor TC 30072 Bond Strength and Liner Properties in BarrelArea, Segment 2L, Between Grounding Straps, 2-Year (1985) %Results ........................... 112 %
35 Motor TC 30072 Bond Strength and Liner Properties in Aft
Equator Area, Segment 51, Between Grounding Straps, 2-Year(1985) Results ......... ........................ .. 113
36 Motor TC 30072 Bond Strength and Liner Properties in AftEquator Area, Segment 51, Between Grounding Straps, 2-Year(1985) Results ......... ........................ .. 114
37 Motor TC 30072 Bond Strength and Liner Properties in AftFlap Area, Segment 6A, 2-Year (1985) Results ............ .. 115
- a- 38 Motor TC 30072 Stress Relaxation Gradient of Propellantin Forward Flap Area, Segment IA1, 2-Year (1985) Results. . . 117
39 Motor TC 30072 Stress Relaxation Gradient of Propellantin Forward Nipple Area, Segment 2A, 2-Year (1985) Results . 118 ..
OOC | " -""
HIVISION No. TWR-32333 Votr SEC [PAGES-C.I ix
S......................... ...... ,.,....,............................. ... .... _ .... .. ..... .. T
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P TABLES ___(CONTINUED)
Table Page
40 Motor TC 30072 Stress Relaxation Gradient of Propellant in-y.. Forward Equator Area, Segment 2L, 2-Year (1985) Results . . . 119
41 Motor TC 30072 Stress Relaxation Gradient of Propellant inBarrel Area, Segment 3A, Between and Under Grounding Straps,2-Year (1985) Results ........ .................... .121
42 Motor TC 30072 Stress Relaxation Gradient of Propellant inAft Equator Area, Segment 51, 2-Year (1985) Results ..... ... 122
43 Motor TC 30072 Stress Relaxation Gradient of Propellant in
* Aft Flap Area, Segment 6A, 2-Year (1985) Results. . ....... 124
44 Motor TC 30072 Stress Relaxation of V-45 Insulation in I.Forward Nipple and Forward Flap Areas, 2-Year (1985)Results ........... ........................... ... 126
45 Motor TC 30072 Stress Relaxation of V-45 Insulation inForward and Aft Equator Areas, Between Grounding Straps,2-Year (1985) Results ........ .................... .127
46 Motor TC 30072 V-45 Insulation Properties in ForwardNipple and Aft and Forward Flap Areas, 2-Year (1985)
* Results ............. ........................... 128
47 Motor TC 30072 V-45 Insulation Properties in Forward and AftEquator Areas Between Grounding Straps, 2-Year (1985)Results ............. ........................... 129
48 Motor TC 30072 V-45 Insulation Properties in Barrel Area,Between and Under Grounding Straps, 2-Year (1985) Results . • 130
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REVISION TV..R32333 VOLSEC PAGOE
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1.0 INTRODUCTION
.-, ----> This report contains results of the yearly material properties testing
of Stage III motor segments in the 12-year bondline aging study. Also
P. reported are the results obtained in the continued testing/monitoring of
Motor TC 30024 (LRSLA Simulated Aging Test Motor No. 3), as are the second-
year results of tests upon the bondline materials and propellant obtained from
dissected Stage III segments of Motor TC 30072 .-LTests on the excise samples from-- .. . . .. .>.
motors TOP-19, -20, and -21 were not performed this year because the test specimens
were not delivered. Figure 1 is a general summary of the tests to be performed.
The testing reported herein was performed during the period of I Decem-
ber 1984 through 30 September 1985. The testing of segments from motors
TC 30005, TC 30019, and TC 30033 took place during August and September
1985. Second-year tests of the motor TC 30072 segments were conducted in I-
the June-September 1985 time period. The effort was accomplished in
accordance with TWR-20946, "Test Plan, Minuteman Stage III Operational
II Surveillance Program," October 1978, and its Addendum No. 1, dated January
1981, and Addendum No. 2, May 1983.
• i 1.1 Twelve-Year Bondline A ging etudy--
This pLase of the Minuteman Stage III Surveillance Program-.'uses
segments removed from three in-process reject motors: TC 30005, TC 30019, .
and TC 30033. All three motors were cast in 1971 and were rejected due to
apex voids. Segments maintained at silo conditions are being used to 4
track bondline aging of Stage III motors with testing of material properties
being performed at one-year intervals to 1990. -This report contains the ....
data from the seven-year aging test interval. The actual time between
baseline or zero-time testing and this test period is about 78 months.
OCREVSMt__ 040 TWP.-32333
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1.2 Testing/Monitoring of Motor TC 30024
Motor TC 30024 was earlier conditioned for 16 months at 1100F and
80 percent RH as LRSLA Simulated Aging Test Motor No. 3, wherein the liner at
the forward flap was brought to a fully degraded condition. Between the
end of conditioning and August 1981, a period of 23 months, motor TC 30024
was kept in storage in a horizontal position at approximately 70°F and
ambient RH. Since then, it has been in vertical storage, aft end down,
at 70°F and 50 percent RH interrupted only for brief periods to allow ..
radiographic and visual inspection at regular intervals to monitor the
existing forward and aft bondline separations and other areas of the motor..., - -~'--. .-
In addition, motor TC 30050 segments that accompanied this motor during
the Simulated Aging Test are being tested at two-year intervals (in 1981,
1983, and 1985) to give an indication of the present material properties of
motor TC 30024.
1.3 Material Properties Testing of Dissected Motor TC 30072
Motor TC 30072 was cast on 8 December 1971, spent most of its life
in the operational force, and then was fully dissected by Wasatch Operations
personnel during April and May 1983. Following dissection, extensive
material properties testing of the propellant/liner/insulation bond system
was performed on motor segments from preselected locations. The remaining
motor segments will be tested at one-year intervals over the next five
years. Prior to testing, the segments are being stored at nominal silo _
conditions. The second-year test results are reported herein, representing
the motor condition at about 165 months of age.
V v8d___O TWR-32333iS P
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2.0 OBJECTIVES
The program objective is to provide material properties aging data at
• silo conditions (70 +5 F, 50 4 . percent RH) for liner bond strength,
ANB-3066 propellant, SD-851-2 liner, and V-45 insulation from selected
-. locations of three Minuteman Stage III motors. These data are to be used to
relate the conditions of the dissected motors to those of operational motors
- (via excise samples) and to compare and adjust the age of all of these to
-. the Stage II nominal liner degradation curve. P% /
2.2 Testing/Monitoring of Motor TC 30024
The monitoring of motor TC 30024 and testing of accompanying motor
segments are intended to determine if continued storage of motor TC 30024
n will result in the worsening or healing of the liner condition and existing
.- bondline separations in the motor. -. i*
2.3 Material Properties Testing of Dissected Motor TC 30072
The dissection of a Stage III motor from the operational force and
testing of its material properties are intended to allow verification of
". motor aging predictions related to liner degradation by a determination
of the longitudinal and circumferential bond strength profiles. Measure-
ment of the bore surface propellant properties is used to verify satis-
factory strain capability.
WVo _ No. TWR-32333 I tWC O
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3.0 SUMMARY AND CONCLUSIONS
3.1 Twelve-Year Bondling Aging Study
Testing for the seven-year interval was performed on the forward flap and
forward equator motor segments. As in the earlier test intervals, the results
and trends were confirmed. The propellant/liner/insulation bond strength,..--.--.
continues to decline with motor age. The rate of decline in the forward flap
area has slowed with the mini DPT bond strength being about 34 psi. The
decline in the forward equator was much greater than previous values, being
down to approximately 51 psi from last year's value of 64 psi. A continuing
increase in liner swell ratios and decline in liner gel fraction are further
evidence of continued liner degradation. An additional decline in the relaxa-
tion modulus of propellant, particularly immediately adjacent to the liner
interface, is again noted. Increases in the separation from termination in
- the bore to the aft flap hinge were observed. Separations at the 300 to 330
degree locations showed no appreciable changes, while inspection of the 20
to 290 degree motor locations show increases of +6 to +10.1 inches from the
64-month data.
"' 3.2 Testing/Monitoring of Motor TC 30024
The visual and radiographic inspections of motor TC 30024 reveal moderate" .'_-
changes in the condition of the propellant/liner/insulation bondline during V..
*i approximately two years of storage and monitoring at silo conditions.
3.3 Material Properties Testing of Dissected Motor TC 30072•- .. -.-
Material properties of motor TC 30072 show the same trends as the three
surveillance dissect motors. Liner degradation is evidenced by a decrease
in mini DPT bond strength, increase in liner swell ratio, and decrease in
DCNREvNmo__ T WR-32333
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i-r
liner gel fraction. The bond strength (see Tables 32 to 37) follows the
usual trends of being highest near the equator, lowest in the flap areas,
and much better under and between the grounding straps.
Stress relaxation data for the propellant near the liner interface
show a correlation between liner bond strength and relaxation modulus. The .' **.
higher the bond strength, the higher the relaxation modulus.
Material properties of V-45 insulation from various motor locations
were determined. The relaxation modulus is higher in the equator areas
and lower near the flaps. V-45 swell ratios appear to be similar at all
motor locations tested. V-45 moisture analysis showed a greater increase
'- in percent moisture in the aft flap and forward equator regions with
moisture content being lowest in the barrel area, between and under the
grounding straps. -
.no. WR-23. V
-vo u. TWR-32333 ISEC PAGE ". F ,/*
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4.0 METHOD
4.1 Material Properties TetsL %.' ,
Insofar as possible, all testing of motor segment or excise ample
material properties throughout the bondline study has been carried out in
a uniform fashion and according to the following test methods. ,.-
4.1.1 Segment Sampling
The foil/epoxy seal and any Interfering fiberglass case material
is removed from the motor segments prior to test ample preparation using
these procedures: --\- -
DP 2413-018, Cutting of Stage III Minuteman Segments for Lab .Sample Preparation
DP 2413-021, Minuteman Stage III Fiberglass Case RemovalFrom Motor Segments by Grit Blasting
44.1.2 Mechanical Property Test Methods
4.1.2.1 Mini DPT Bond Tensile
DP 2413-008, Preparation of Mini Double Plated Tensile (Mini DPT)Bond Strength Specimens
P DP 2413-013, Testing of Mini Double Plated Tensile (Mini DPT) BondStrength Specimens
, .* 4.1.2.2 Propellant Relaxation Modulus
DAP 0270, Determination of Relaxation Modulus of Propellant by
*. Use of Mini Tensile Specimens
DP 2413-015, Stress Relaxation Testing Using the Instron Tensile -....Tester
" 4.1.2.3 Shore A Hardnes (15-Second) "" '
SOP 325, Section 6
4.1.2.4 Propellant Mini Tensile
SLP-528, Mechanical Forming of Propellant Specimens
DP-2413, Operation of Instron Tensile Testing Instruments
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mv aow _ mo TWR-32333 V OL'.-e- Pc 1GE 6
t ,,':-' - ,
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.. 25V-45 Relation modulus
LTP-2413-0151, Preparation of Rubber Stress Relaxation Speeimns frou
Motor Segments i'fr
DP 2413-015, Stress Relaxation Testing Using the Instron Tensile Tester ..0? 1i,
4.1.2.6 SD-851-2 Liner Relaxation Modulus
SLP-472, Penetrometer Hardness Testing of Liner PropellfAt Bond
4.1.3 Chemical Property Test Methods
4.1.3.1 SD-851-2 Liner Moisture
DAP 0269, Determination of Moisture in SD-851-2 Liner
4.1.3.2 SD-851-2 Liner Solvent Swell Ratio _
DAP 0197, Determination of Solvent Swell Ratio of Cured Liner fromMM III Stage Samples
4.1.3.3 SD-851-2 Liner Gel Fraction
DAP 0254, Determination of Minuteman III Stage Liner Gel Fraction
4.1.3.4 V-45 Moisture Content
4.1.3.4.1 Azeotropic Distillation
DAP 0321, Determination of Moisture in Rubber by Azeotropic .Distillation
4.1.3.4.2 DuPont Moisture Analysis
DAP 0317, Determination of Moisture in V-45 and C-4 Insulation by
DuPont Moisture Evolution Analyzer
4.1.3.5 V-45 Swell Ratio
DAP 0197, Determination of Solvent Swell Ratio of Cured Liner from
MM III Stage Samples
4.1.3.6 V-45 DOP Content
DAP 0300, Determination of DO? in V-45 Rubber
4.1.3.7 SD-851-2 Liner C-O/C-C Absorbance Ratio
DAP 0399, Infrared Analysis Using the Nicolet 7199 FrIR
16. TWR-32333 VoLW fC FpACE 7
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4.1.4 Evaluation of Material Properties Test Results
Once the testing of the motor segments was accomplished, results were
compared with those from earlier test intervals or other aging and surveil-
lance motors. This was done largely through the use of plots of measured
values versus conditioning time or motor location.
4.2 Twelve-Year Bondline Aging Study
As at earlier test intervals, the designated segments (see Figure 2
and Table 1) were removed singly from conditioning, the foil/epoxy seal was ....
removed, and lab specimens were prepared and tested in accordance with
Table 2 and the above cited methods. While awaiting testing, the specimens
were kept tightly sealed in aluminum foil to minimize loss of moisture.
4.3 Testing/Monitoring of Motor TC 30024
Simulated silo conditioning of motor TC 30024 at 700 + 5°F and 50 +
5 percent RH was continuous except for brief periods to allow for visual
inspection approximately monthly and radiographic inspections on a six- ,
month basis. These inspections, performed in accordance with the test
matrix shown in Table 23, were compared with each other and with earlier
(LRSLA) inspections, provide the basis for determining actual changes
with time in the bondline and grain configuration of motor TC 30024.
Additional information as to the present condition of the bondline
and propellant in motor TC 30024 is being obtained by periodic testing of
the material properties of segments from motor TC 30050 (see test matrix
in Table 24). These segments accompanied motor TC 30024 throughout the
LRSLA SAT conditioning, and in that accelerated aging test, motor TC 30050
NVISMO 4. TWR-32333 I VOLWSC PAGE
* I 8
..- **.-J. ..- ,l. ? J~~J J ~ . ~3 ~ ~ . *~. ~,. ,-. -3--
-
segments were laboratory tested to verify that the liner in the forward flap
region of the intact motors, TC 30024 and TC 30106, was fully degraded.
The first testing of these segments under the surveillance program was
performed in September 1981, after additional storage with motor TC 30024
at silo conditions for about 1.5 years. All tests at the present and at
earlier times were performed in accordance with the test procedures cited '.
in Section 4.1.
4.4 Material Properties Testing of Dissected Motor TC 30072 1%
The full dissection and material properties testing of Stage III motors
from the operational force was first proposed in 19811, but the first such
motor, TC 30072, did not become available until early 1983. With its
availability came a request that the test plan be revised to provide for
additional material properties testing to track the bondline condition to _
"* at least 17 years of motor age. Without making changes in the original
"" dissection plan or deleting any of the originally planned material properties
I testing, the test plan was revised2 . The current plan makes use of motor
segments that would have otherwise gone unused and provides for annual
"" testing to 1989 (Table 28), or about 17.5 years of age for motor TC 30072.
Following dissection of motor TC 30072 by Operations personnel, further
subsectioning of the motor segments and preparation and testing of laboratory
specimens was performed by workers in the Research and Development Laboratories.
This testing was performed in accordance with the methods cited above, and
results are presented in Section 5.2.
1TWR-20946, "Test Plan, Minuteman Stage III, Operational Surveillance Program,Addenum No. 1," January 1981.
2TWR-20946, "Test Plan, Minuteman Operational Surveillance Program, Addendum
No. 2," May 1983.
vWSM N. Tt.WR-32333 VOL
" I 9
**..- *o* .-. .
-
5.0 RESULTS
5.1 Twelve-Year Bondline Aging Study
The plan for motor segment use and the material properties test matrix
for the 12-year (1978 to 1990) bondline aging study using motors TC 30005,
TC 30019, and TC 30033 are shown in Tables 1 and 2. The motor segment layout
is in Figure 2. The results of the material properties testing at the seven-
year test interval (actually 76 months of conditioning at 700F and 50 percent I.
" RH) are summarized in Figures 3 to 24 and Tables 3 to 22. In the latest
testing, only the forward flap and forward equator segments were tested,
as planned. Earlier trends and results tend to be confirmed. As noted in
• .previous test intervals, the motor-to-motor differences in general are small.
The propellant/liner/insulation bond tensile strength continues to drop
off with increasing motor age or conditioning time. At the 76-month interval,
*i the bond strength (34 psi) is approximately the same as the 64-month data
in the forward flap area (see Figure 3). In the forward equator, bond strength
has dropped from 64 psi at 64 months to 51 psi at 76 months. In the forward
flap area, the liner swell ratio has increased to a value of 2.13, and the
- liner gel fraction has decreased to a value of 0.40. These results confirm
that degradation continues to be least in the most protected locations,
that is where moisture enters with difficulty, as at the forward equator
and two inches aft of the forward equator.
Propellant relaxation modulus has declined with storage time, particularly
immediately adjacent to the liner interface. This effect can be caused by
* moisture effects and migration of DOP plasticizer from the V-45 insulation:
the amount of contribution of each to the degradation has not been identified.
oo ISV, ,e No. TWR-32333 VOL
EC .Mal1 0
-
.$°.
5.2 Testing/Monitoring of Motor TC 30024
5.2.1 Motor Inspection
Radiographic inspections of motor TC 30024 revealed evidence of further
liner degradation in some areas while other areas showed no appreciable change.
More degradation was evident in the flap bulb area. The separations that
were found between the aft polar boss insulation and glass at the aft tip have
not changed. There was also no evidence of change in the forward flap
area. However, new separations from the in bore to 12 inches aft of the aft
flap bulb hinge were detected in Area A at 172 deg angular location.
Visual inspections of motor TC 30024 have shown no trends in the
physical measurements to indicate significant changes in either the motor
* bore diameter or the forward gap area. There is also no apparent hardening
of the propellant surface in the aft bore. The latest Shore A readings
ranged from 74-79, slightly lower than values for August 1981.
5.2.2 Segment Testing
The results of material properties testing of the motor TC 30050 segments
that have accompanied motor TC 30024 since the LRSLA Simulated Aging Test
conditioning are summarized in Figures 26 to 32 and Tables 25 to 27. The
bond strength and liner gel fraction show a slight decrease in values as
- compared to baseline data. Liner swell ratios also follow a similar trend
with a slight increase in swell ratio values.
5.3 Material Properties Testing of Dissected Motor TC 30072 .- %
The plans for baseline and later testing of the material properties
of dissected operational motor TC 30072 are shown in Tables 28 to 31. The ["-"
designation of specific motor segments is obtained from Figures 34 to 39.
The results of the 1985 material properties testing are summarized in Figures
40 to 62 and Tables 32 to 48.
DOC I "REVISION NO.__ TW VOL .__v~s~o,,__ No. TWR-32333 ".
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0 5.3.1 Bond Strength and Liner PropertiesThe motor TC 30072 propellant/liner/insulation bond strength and liner
properties test results are summarized in Figures 40 to 48 and Tables 32 to
p 37.
The effects of motor location and crosshead test rate on mini DPT bond
strength are seen in Figures 40 and 41. The bond strength is highest in the
barrel region and near the equators where there is the lowest moisture penetra-
* tion. Also evident is the existence of lower bond strength in the forward end
* of the motor than in the aft end. The motor profiles of liner gel fraction
and liner swell ratio show a trend for a decrease in gel fraction and
* ~increase in swell ratio values. Liner swell ratio values show a decrease : -
in the more protected barrel region.
1 5.3.2 Relaxation Modulus of Propellant at the BondlineStress relaxation testing results for motor TC 30072 are shown in
Figures 49 to 61 and Tables 38 to 45. The previously noted trend of lower
propellant stress relaxation modulus in the forward end of the motor and
higher modulus in the barrel near the equators and under the grounding
* straps is still in evidence. This correlation suggests the relationship
of bond strength to propellant relaxation modulus.
5.3.3 V-45 Insulation Material Properties
The relaxation modulus, moisture content, dioetylphthalate (DOP)
plasticizer content, and swell ratio of V-45 insulation were determined
* in various locations of motor TC 30072. The V-45 relaxation modulus is
* typically lowest in the equator region and highest in the forward and aft
flaps. The V-45 moisture content results show that the percent moisture
is lowest in the barrel region. The test results are sutmmarized in Tables
44 to 48. .TWR-32333
12
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NVSM NO. TWR-32333 VOLWC PAGE 5
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TABLE 9 L
PROPELLANT SHORE A HARDNESS, 15-SECOND READINGSFORWARD FLAP AREA, SEGMENT 1B6, AREA A
7-YEAR (1985) RESULTS
Distance From MotorBondline (in.) TC 30005 TC 30019 TC 30033
0.1 44±1.11 44±1.0 50±1.530.2 50±1.0 47±0.0 55±1.10.3 51±0.6 48±0.6 57±0.60.4 52±0.6 46±0.0 60±1.1 ,0.5 51±1.0 48±0.0 60±1.0
0.6 53±0.6 48±1.5 62±0.60.7 60±0.0 50±2.1 63±1.00.8 61±0.6 51±1.1 64±0.60.9 60±0.6 51±1.1 63±0.61.0 61±0.6 53±1.5 64±1.0
1.1 61±0.6 57±1.5 64±1.01.2 60±1.0 58±2.0 64±1.01.3 59±1.0 59±0.6 64±0.61.4 58±0.6 61±1.7 66±0.61.5 55±0.6 63±1.0 65±0.0
1.6 52±0.6 63±0.6 63±0.61.7 50±0.0 64±0.6 62±1.01.8 49±1.5 63±1.0 61±1.11.9 46±0.6 64±0.6 60±0.02.0 45±1.0 64±0.6 61±0.6
1Standard Deviation for Triplicate Tests
o-c
- No TWR-32333 VO-
SEC PAGE
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. PROPELLANT SHORE A HARDNESS, 15-SECOND READINGSFORWARD FLAP AREA, SEGMENT 1B6, AREA B
7-YEAR (1985) RESULTS
.' .Distance From Motor I- Bondline (in.) TC 30005 TC 30019 TC 30033
0.1 65±0.61 57±0.6 59±1.10.2 65±1.1 59±1.0 61±0.6 tm0.3 65±0.6 59±1.1 62±1.00.4 64±1.0 57±1.0 61±0.60.5 65±2.1 57±0.6 59±1.0
0.6 64±1.0 55±0.6 58±0.6* 0.7 65±0.6 54±0.6 56±0.6
0.8 62±0.6 56±2.1 55±0.00.9 60±0.6 55±0.6 56±0.61.0 60±0.6 55±0.6 55±0.0
1.1 59±0.6 56±1.0 56±0.61.2 58±0.0 56±0.6 55±0.61.3 57±0.0 57±1.1 54±0.61.4 58-±0.6 56-±1.0 52-±0.0,""°
1.5 58±0.6 58±0.6 53±0.6
1.6 56±0.0 60±1.0 50±0.61.7 54±0.6 60±0.6 49±0.0
-. 1.8 54±0.6 59±0.6 47±0.61.9 54±0.0 60±0.6 47±1.0
- 2.0 52±0.0 60±1.0 46±0.6
lStandard Deviation for Triplicate Tests
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N.TWR-32333 VOL4SEC PAGE
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TABLE 11
PROPELLANT SHORE A HARDNESS, 15-SECOiN READNGSFORWARD FLAP AREA, SEGMENT 1B6, AREA C
7-YEAR (1985) RESULTS
Distance From Motor
Bondline (in.) TC 30005 TC 30019 TC 300530.1 54±0.61 60±0.6 57±2.30.2 53±0.0 64±0.6 59±0.60.3 50±0.0 67±0.6 58±1.00.4 45±0.6 67±0.6 58±0.60.5 43±0.6 65±0.6 58±0.6
0.6 41±0.6 61±0.6 59±0.61*0.7 42±0.0 60±0.6 61±0.6
0.8 41±0.6 58±0.6 62±0.00.9 42±0.6 58±0.6 64±0.61.0 43±0.0 56±1.0 67±0.0
1.1 43±0.6 55±0.6 67±0.61.2 43±0.6 54±0.6 66±0.61.3 40±0.6 55±0.6 65±0.61.4 39±0.6 56±0.6 65±0.0 ~-1.5 38±0.6 55±0.6 63±0.6
1.5 40±0.6 56±0.6 60±0.61.7 39±0.6 57±0.6 57±0.0. .1.8 41±0.6 56±0.6 55±0.61.9 42±0.6 57±0.6 54±1.02.0 43±0.6 57±0.6 52±0.6
Standard Deviation for Triplicate Tests
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MOTOR TC 30005 LINER PENETROMETER DATA SFORWARD EQUATOR 0PROFILE, SEGMENT 2L2, 10-SEC READINGS %
76 F. 7-YEAR (1985) RESULTS
DistncePenetration (101 m)DitneStandard Needle Fine Needle
Aft of lOOg No NoEquator (in.) Weight Weight Weightk
-1 68 37 51
1 32 17 22
3 48 29 32
5 62 34 35 ~~
7 53 31 31
9 60 33 37
11 76 39 47
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TABLE 17 *~.
MO)TOR TC 30019 LINER PENETROMETER DATA YFORWARD EQUATOR PROFILE, SEGMENT 2L2, 10-SEC READINGS %
0-4
76 F, 7-YEAR (1985) RESULTS
Distance Standard Needle (10ne NeedleAft of loog No No
Equator (in.) Weight Weight Weight
-1 42 32 35
1 33 18 21
3 48 22 31
5 47 21 29
7 58 34 41
9 59 34 36
11 68 39 46
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TABLE 18
MOTOR TC 30033 LINER PENETROMETER DATA e.FORWARD EQUATOR PROFILE, SEGMENT 2L2, 10-SEC READINGS ~.~
76 0F, 7-YEAR (1985) RESULTS
Penetration (10- mm)Distance Standard Needle Fine Needlfe ' ~Aft of bOog No No
Equator (in.) Weight Weight Weight2
-1 48 30 49 .
1 44 23 24
3 53 30 35
5 59 33 34
7 58 32 38
9 57 27 33
11 68 38 44
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TABLE 22 t
PROPELLANT SHORE A HARDNESS, 15-SECOND READINGSFORWARD EQUATOR AREA, SEGMENT 2L2
7-YEAR (1985) RESULTS
Distance From MotorBondline (in.) TC 30005 TC 30019 TC 30033e
p0.1 66±0.61 61±1.5 62±0.00.2 63±1.0 63±1.1 61±1.00.3 63±1.0 57±0.6 60±0.6
r0.4 64±0.6 56±1.5 59±1.0*0.5 61±1.1 52±0.6 56±1.0
0.6 60±0.6 50±0.6 55±0.60.7 57±0.6 50±0.6 54±0.00.8 57±0.6 48±0.6 53±0.00.9 57±0.0 48±1.0 52±1.01.0 57±0.6 48±0.6 53±1.1
1.1 58±0.6 50±0.6 53±1.1n1.2 57±1.0 50±0.6 54±1.11.3 56±1.1 52±0.6 53±0.01.4 57±1.5 53±1.0 54±0.01.5 57±1.0 53±0.6 54±0.6
1.6 57±1.0 53±0.6 54±0.61.7 58±0.6 55±0.0 54±1.01.8 58±0.6 55±0.6 54±0.6
*1.9 59±1.5 54±0.0 55±0.02.0 59±1.0 55±0.6 55±0.0
* 1Standard Deviation for Triplicate Tests
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MOTOR TC 30072 STRESS RELAXATION GRADIENT OF PROPELLANTIN FOJRWARD FLAP AREA, SEGMENT lAl
2-YEAR (1985) RESULTS
Relaxation Modulus (psi)Distance From Time From Strain Log Time (min)Bondline (in.) Cutting (hrs) ) -0.93 -0.34 0.20 0.80 1.30
012.1 2.00 397 302 251 206 1772.00 455 349 291 242 2122.00 426 3Y26 271 24 '194
0.3 2.4 1.99 318 229 184 149 1242.8 2.00 323 238 191 156 134
2.00 320 2f34 1 88 152 129
0.5 3.0 2.00 347 259 211 172 1473.1 2.00 347 253 208 172 150
2.00 3 47 2i5-6 210 11-2 148
1.0 2.6 1.98 330 245 198 161 1362.0 2.00 293 218 178 146 135*.
1.99 312 232 188 154 136
2.0 3.3 2.00 369 278 227 188 16435.0 2.00 358 269 222 184 1622.00 364 274 224 186 163
I Vo
SIC PAGE117
-
TABLE 39
MOTOR TC 30072 STRESS RELAXATION GRADIENT OF PROPELLANT%IN FORWARD NIPPLE AREA, SEGMENT IA
2-YEAR (1985) RESULTS
RelaxationModulus (pli).VDistance From Time From Strain Tie( ) _
flondline (in.) Cutting_(hrs) M -093 -0.34 0.20 0.80 1.10
0.1 3.1 2.00 306 235 198 168 1483.0 2.00 317 229 184 150 129
2.00 312 232 191 i5 13A
0. 3 3.4 2.00 330 248 201 163 1 172.9 1.99 333 246 199 162 I'll
2.0 33i2 247 260 16-2 1 17
0. 3.7 1.99 410 309 256 210 19)3.4 2.01 376 280 231 187 I rg
2.00 393 294 244 198 170
1 .0 3.0 2.00 404 305 254 210 1823.8 2.00 393 292 243 204 180
2.00 398 298 248 207 181
.03.3 1.98 268 189 149 118 984.2 2.01 290 207 165 132 111
2.00 279 1908 157 12 104
NFV191O9 NO__ TWR-32333 I tMC MW118
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TABLE 40
MOTOR TC 30072 STRESS RELAXATION GRADIENT OF PROPELLANT
IN FORWARD EQUATOR AREA, SEGMENT 2L
2-YEAR (1985) RESULTS
* . A°..g
Distance Time ' l ."-.
From From Relaxation Modulus (psi) .
Motor Bondline Cutting Strain Log Time (min) ,_.. -.
Location (in.) (hrs) (%) -0.93 -0.34 0.20 0.80 1.30
Area A 0.1 2.9 2.00 671 545 479 415 372
(Aft of 4.3 2.00 710 682 527 468 418 t.'.
Equator, 2.00 69--1 614 50-3 41 395
BetweenGrounding 0.3 3.3 - 460 364 317 279 255
Straps) 3.7 - 467 382 333 294 266 9tras463 --3 32-5 26 26-
0.5 3.7 1.99 493 400 346 302 2712.01 472 388 337 295 270
2.00 482 394 341 298 270I.e
1.0 3.8 1.99 354 241 198 167 149
4.5 1.99 494 363 306 260 229
1.99 424 302 252 213 189
2.0 4.0 2.01 406 317 269 238 212 "
4.3 2.00 464 365 320 287 257
2.00 435 341 294 262 234
Area B 0.1 4.6 - 586 492 436 383 349 .
(At Equator, 3.5 606 496 433 374 335
Between 596 494 434 378 342
GroundingStraps) o.3 5.0 1.99 443 458 411 368 338
3.9 2.02 545 362 315 275 2472.00 49-4 410 363 321 292
0.5 3.5 2.00 439 350 301 260 233 -.
4.3 2.00 503 426 356 310 280
2.00 471 388 328 285 256
1.0 3.8 2.00 295 219 179 147 1293.4 2.00 402 339 270 233 208
2.00 348 279 22-4 190 168 -.
2.0 4.2 2.00 342 260 218 184 164
3.8 2.00 449 351 298 254 226 ""
2.00 395 305 258 219 194 -
"i- sft. TWR-32333 I OW.
POIE 119 " . °
-
TABLE 40 (CONTINUED)
MOTOR TC 30072 STRESS RELAXATION GRADIENT OF PROPELLANTIN FORWARD EQUATOR AREA, SEGMENT 2L .. '..-
2-YEAR (1985) RESULTS ' "
Distance TimeFrom From Relaxation Modulus (psi)
Motor Bondline Cutting Strain Los Time (min)Location (in.) (hrs) (W) -0.93 -0.34 0.20 0.80 1.30
" Area C 0.1 4.1 2.00 374 286 239 202 179(Forward 2.5 2.00 449 351 297 255 228of Equator 2.00 4-1 31-8 26-8 228 203in FlapArea) 0.3 3.5 1.99 337 258 414 181 159
2.8 2.01 354 273 229 194 1712.00 345 265 321 187 165
0.5 3.8 1.99 316 248 208 177 1561.9 2.00 362 282 239 204 180
1.99 339 265 223 190 168
1.0 4.3 2.00 468 372 318 274 2442.3 2.00 455 362 310 266 235
2.00 461 367 314 270 239
2.0 2.1 2.00 247 183 152 127 1122.7 2.00 310 227 186 154 137
2.00 278 205 169 14-0 124
.- .N --
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TABLE 41
MOTOR TC 30072 STRESS RELAXATION GRADIENT OF PROPELLANTIN BARREL AREA, SEGMENT 3A, BETWEEN AND UNDER GROUNDING STRAPS
2-YEAR (1985) RESULTS
Distance Time -From From Relaxation Modulus (psi) .'"
Motor Bondline Cutting Strain Log Time (min) V-Location (in.) (hrs) (%) -0.93 -0.34 0.20 0.80 1.30
Between 0.1 3.2 2.00 724 633 567 495 437Grounding 4.0 2.00 797 703 609 529 478Straps 2.00 760 668 588 512 457
0.3 3.6 2.00 621 516 456 404 3662.3 2.00 621 533 460 402 358
2.00 621 524 458 403 362
0.5 3.8 1.99 474 375 325 281 252 --2.8 2.00 437 355 312 258 226
1.99 455 365 318 269 239
1.0 3.3 2.01 468 351 281 228 1772.9 2.00 393 296 249 206 183
2.00 430 323 265 217 180
2.0 3.7 - 450 337 278 234 2053.5 - 437 324 262 213 179
443 330 270 223 192
Under 0.1 3.0 1.99 1360 1170 1040 930 859 .Grounding 3.9 1.98 1550 1310 1170 1010 899 -Straps 1.98 1455 1240 1105 970 879
0.3 3.3 2.00 924 774 684 608 5634.2 2.00 1020 861 752 644 569
2.00 972 817 718 626 566
0.5 3.6 1.99 869 748 665 597 5362.9 2.01 820 702 628 554 495 3
2.00 844 725 646 575 515
1.0 2.8 2.00 623 506 428 366 3193.2 2.00 575 451 389 315 269
2.00 9-9 78 408 340 294
2.0 3.0 2.00 552 433 355 309 2733.5 2.00 607 465 384 315 269 ,.
2.00 579 449 375 312 271
I* '
____ol NO TIWR-32333 VOL
rSIC PAGE121. . . . .. . . . .
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TABLE 42 "'.,'.
MOTOR TC 30072 STRESS RELAXATION GRADIENT OF PROPELLANTIN AFT EQUATOR AREA, SEGMENT 51
2-YEAR (1985) RESULTS
Distance TimeFrom From Relaxation Modulus (psi)
Motor Bondline Cutting Strain Log Time (min) .Location (in.) (hrs) (%) -0.93 -0.34 0.20 0.80 1.30
Area A 0.1 3.0 2.00 747 616 540 471 430
(Forward 2.00 790 645 562 496 430
of Equator, 2.00 768 630 551 483 430
BetweenGrounding 0.3 3.4 1.99 731 601 527 445 439Straps) 3.3 2.00 868 745 638 559 488
2.00 79-9 673 58-2 50-2 463
0.5 3.7 2.01 864 726 620 542 4873.6 2.00 951 794 696 607 539
2.00 907 760 658 574 513
1.0 3.0 1.99 713 563 476 402 3543.9 1.99 742 594 483 393 341 " '-"
1.99 727 578 479 397 347 .
2.0 3.3 2.00 843 681 564 462 3963.2 2.00 750 594 514 442 386
2.00 796 637 539 452 391
* Area B 0.1 3.5 2.00 1500 1250 1090 925 816
(At Equator, 4.1 2.00 1350 1110 956 795 683Between 2.00 1425 1180 1023 860 749GroundingStraps) 0.3 4.0 2.00 1140 927 793 673 598
3.5 2.00 1270 1260 851 900 592
2.00 1205 1093 822 786 595
0.5 3.3 2.00 1460 882 759 637 5563.7 2.00 1160 928 773 626 528
2.00 1310 905 766 631 542
1.0 3.6 2.00 894 686 554 443 370
2.4 2.00 1010 794 654 544 463
2.00 952 740 604 493 416
2.0 3.9 2.00 912 727 613 52' 456
2.8 2.00 758 633 534 442 375
2.00 835 680 573 484 415
DOC.
RE SON NO, TWR-32333 v OL
SEC IPAGE122
-
TABLE 42 (CONTINUED)
MOTOR TC 30072 STRESS RELAXATION GRADIENT OF PROPELLANTIN AFT EQUATOR AREA, SEGMENT 51
2-YEAR (1985) RESULTS___
Distance TimeFrom From Relaxation Modulus_(psi)
Motor Bondline Cutting Strain Log Time (min)Location (in.) (hrs) M% -0.93 -0.34 0.20 0.80 1.30
Area C 0.1 3.0 2.00 941 757 654 544 478(Aft of 3.7 2.00 891 677 549 394 351
*Equator, 2.00 916 717 601 469 414* in Flap
Area) 0.3 3.0 1.98 745 606 504 424 3654.0 2.00 851 642 519 404 325
1.99 798 -624 511 414 345
0.5 3.3 2.01 944 749 616 547 4752.8 2.00 929 738 627 526 461
2.00 936 7 43 '62-3 5 3-6 468
1.0 3.6 2.02 1230 948 759 591 4673.1 1.99 2160 951 747 556 423
2.00 1245 949 -753