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ISTA CHINA Packaging SymposiumISTA CHINA Packaging SymposiumISTA CHINA Packaging Symposium

September 17, 2009

Guidelines for Product Improvement:

Usage of all fragile parts’ DBCs on a product

TRI Osaka Takamasa NAKAJIMA

Kobe Univ. Katsuhiko SAITO

9:40-10:15No.13

Self-introduction of speakerSelfSelf--introduction of speakerintroduction of speaker

Name ： Takamasa NAKAJIMAOrganization ： TRI Osaka １９８８～

＜Research＞・ Optimal cushioning design method・ Test method for shock fragility of products・ AFS (Accumulated Fatigue Spectrum)

& Vibration Test method by AFS ( K2-Fatigue by IMV )

＜Consultancy＞・ Packaging (Transportation) ・ Shock & Vibration etc.

＜Test & Evaluation＞・ Vibration ・ Drop ・ Compression strength・ Shock fragility of product ・ Cushioning material etc.

Background of the presentationBackground of thBackground of thee presentationpresentation

This plan was selected as a national project, “Feasibility Study of Standardization” last year.

⇒ A new test procedure has been put together.

⇒ We visited CPRTC at Tianjin (Director Li Hua etc.)

and Jinan Univ. at Zhuhai (Prof. Zhi-Wei Wang etc.).

We would like to contribute a new idea to shock test standard all over the world.⇒ Both cost-cut and high quality will be realized.

Purpose of the presentationPurpose of thPurpose of thee presentationpresentation

Mechanical Shock MachineMechanical Shock MachineMechanical Shock Machine

Accelerometer

Product

Guide Rod

Shock Table

Programmer

Lifter

Measuring System

N2 Gas Cylinder

Controller

Non-damage

A

ΔV

A

t

DamageInput Shock Pulse

ΔV

Explanation of DBC( Damage Boundary Curve )

Explanation of DBCExplanation of DBC( Damage Boundary Curve )( Damage Boundary Curve )

Shock Analytical Model by R. E. NewtonShock Analytical Model by R. E. NewtonShock Analytical Model by R. E. Newton

Specimen

Part A （ex. a front panel）

Part C （ex. a power unit）

Part B（ex. a chip computer）

Part D （ex. a frame）

Product

The most fragile part

Damage Boundary

ＡＣπΔＶ

Ｃ／２

ΔＶＣ

Velocity Change

Acc

eler

atio

nCritical Velocity

Method-B

DBC and Test Method of Shock Fragility

Critical Acceleration

ΔＶ

Ａ

Ｔ

Shock Test

Shock TestMethod A

GB/T 15099, ASTM D 3332, JIS Z 0119 （Dr. R.E.Newton）GB/T 15099, ASTM D 3332, GB/T 15099, ASTM D 3332, JISJIS Z 0119Z 0119 （（Dr. Dr. R.E.NewtonR.E.Newton））

GB/T 15099、ASTM D 3332 、JIS Z 0119（Dr. R.E.Newton）

GB/T 15099GB/T 15099、、ASTM D 3332 ASTM D 3332 、、JISJIS Z 0119Z 0119（（Dr. Dr. R.E.NewtonR.E.Newton））

Shock test for packaging design

World ー

China GB/T 15099 -94

America ASTM D 3332

EU －

Japan JIS Z 0119

DBCs for all fragile parts↓

Guideline for product improvement

New procedure

加速度　A

速度変化　⊿V

損傷境界曲線DBC　（Damage Boundary Curve)

Acc

eler

atio

n A

Velocity Change ⊿V

Shock Test by Product Designer & Shock Test by Package Designer( IEC 68-2-27 ASTM D 3332, JIS Z 0119 )

Shock Test by Shock Test by ProductProduct DesignerDesigner && Shock Test by Shock Test by PackagePackage DesignerDesigner( IEC 68( IEC 68--22--27 ASTM D 3332, JIS Z 0119 )27 ASTM D 3332, JIS Z 0119 )

500m/s2、11ms（IEC 68-2-27）

Drop Height

DBC(ASTM D 3332)（JIS Z 0119 2002）

Ac500m/s2 ⇔ 250m/s2

An accident may happen due to lack of cushioning.

If this result is used in packaging design, ....

Ac500m/s2 ⇔ ∞Over-Packaging

Result of Shock Test for a Video-playerResult of Result of Shock Test for a VideoShock Test for a Video--playerplayer

A hook of a gear comes off. Legs of a coupler break.

Stoppers of a front frame come off.A front panel breaks.

Shock Analytical Model by R. E. NewtonShock Analytical Model by R. E. NewtonShock Analytical Model by R. E. Newton

Specimen

Part A （ex. a front panel）

Part C （ex. a power unit）

Part B（ex. a chip computer）

Part D （ex. a frame）

Product

Part A Part C Part DPart B

・・・

Product

The most fragile part

加速度　A

速度変化　⊿V

損傷境界曲線DBC　（Damage Boundary Curve)

Velocity Change ⊿V

Acc

eler

atio

nA

DBC

Part B

Part CPart A

A

B

A

B

C

A

C

A B

Shock Test by Product Designer & Shock Test by Package Designer( IEC 68-2-27 ASTM D 3332, JIS Z 0119 )

Shock Test by Shock Test by ProductProduct DesignerDesigner && Shock Test by Shock Test by PackagePackage DesignerDesigner( IEC 68( IEC 68--22--27 ASTM D 3332, JIS Z 0119 )27 ASTM D 3332, JIS Z 0119 )

A shock test result of a certain productA shock test result of a certain productA shock test result of a certain product

TestNo.

Accele.m/s2

⊿Vm/s

⊿Tms Observations

1 1930 2.31 2.01 No damage

⊿VTest

2 2110 2.49 1.98 No damage

3 2660 2.90 1.94 Part A was deformed.

4 2790 3.14 1.59 Part B was deformed.

5 3360 3.41 1.50 No damage except for A & B.

6 228 7.41 32.9 異常なし。許容加速度試験

7 279 7.20 26.1 異常なし。

8 323 7.12 22.3 部位Cが変形。

9 376 6.88 18.4 上記の他、部位Aおよび部位Dが変形。

10 419 6.93 16.8 部位A,C,Dの他、異常なし。


TestNo.

Accele.m/s2

⊿Vm/s

⊿Tms

Observations

1 1930 2.31 2.01 No damage

⊿VTest

2 2110 2.49 1.98 No damage

3 2660 2.90 1.94 Part A was deformed.

4 2790 3.14 1.59 Part B was deformed.

5 3360 3.41 1.50 No damage except for A & B

6 228 7.41 32.9 No damage

ACTest

7 279 7.20 26.1 No damage

8 323 7.12 22.3 Part C was deformed.

9 376 6.88 18.4 Part A & B was deformed.

10 419 6.93 16.8 No damage except for A,C & D

製品衝撃強さ（損傷境界曲線）JIS Z 0119

100

1000

10000

1 10

速度変化(m/s)

加速度(m/s2)

Velocity change (m/s)

Acc

eler

atio

n (m

/s2 )

Result of Shock Test (DBC)

ASTM D 3332, JIS Z 0119

No damage

No damage

Part A breaks.

Part B breaks.No damage except for

Part A and Part B

No damageNo damage

Part C breaks.Part A and Part D break.

No damage except for Part A, Part C,

and PartD


100

1000

10000

1 10

速度変化(m/s)

加速度(m/s2)


Acc

eler

atio

n (m

/s2 )


ASTM D 3332, JIS Z 0119

No damage

No damage

Part A breaks.

Part B breaks.No damage except for

Part A and Part B

No damageNo damage

Part C breaks.Part A and Part D break.

No damage except for Part A, Part C,

and PartD

ASTM D 3332


100

1000

10000

1 10

速度変化(m/s)

加速度(m/s2)


Acc

eler

atio

n (m

/s2 )


ASTM D 3332, JIS Z 0119

No damage

No damage

Part A breaks.

No damage( Part C and Part D )

No damageNo damage

New ProcedurePart B breaks.

No damage( Part B )

Part A and Part D break.

Part C breaks.

New ProcedureResult of Shock Test （ DBC ）

（Enlarged Graph）

200

250

300

350

400

450

500

2 2.5 3 3.5 4Velocity Change ⊿V　(m/s)

Acceleration A　　(m/s2)

Part A

Part B

Part C

Part D

Damage：A

Damage：C

Damage：A, B

Damage：A,C,D

Damage：A,B,C,D

Drop Height：19cm 25.5cm 35cm calculated at e=0.3

New ProcedureResult of Shock Test （ DBC ）

（Enlarged Graph）

200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：A

Damage：C

Damage：A, B

Damage：A,C,D

Damage：A,B,C,D

If Part A is refined, ・・・


Result of Shock Test （ DBC ）（Enlarged Graph）

200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：C

Damage：B

Damage：C,D

Damage：B,C,D

If Part A is refined, ・・・

ex. 1 When the max drop height is 30cm, Ac will be improved from 323 ⇒ 419 m/s2.



200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：C

Damage：B

Damage：C,D

Damage：B,C,D

Drop Height：19cm 25.5cm 35cm calculated at e=0.3Drop Height：19cm 25.5cm 35cm calculated at e=0.3


200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：C

Damage：B

Damage：C,D

Damage：B,C,D

ex. 2 When the max drop height is 40cm, Ac will not be improved.

Effective

Meaningless

If Part A and Part B are refined, ・・・



200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：C

Damage：C,D

Damage：C,D

If Part A and Part B are refined, ・・・



200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：C

Damage：C,D

Damage：C,D



200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：C

Damage：C,D

Damage：C,D

ex. 1 When the max drop height is 30cm, Ac will be improved from 323 ⇒∞ m/s2.


Very Effective

Meaningless

If Part C is refined, ・・・



200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：A

Damage：A, B

Damage：A,D

Damage：A,B,D

If Part C is refined, ・・・



200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：A

Damage：A, B

Damage：A,D

Damage：A,B,D



200

250

300

350

400

450

500



Part A

Part B

Part C

Part D

Damage：A

Damage：A, B

Damage：A,D

Damage：A,B,D


ex. 2 When the max drop height is 40cm, Ac will be improved from 279 ⇒ 323 m/s2.

Effective

Meaningless

--- The point ---By this new test procedure,product designers can geta guideline of part’s improvement.

Ex. H=30cm ⇒ “Refine Part A.”

or “Refine Part A and B.”H=40cm ⇒ “No need to refine”

or “Refine Part C.”

Result of Shock Test for a Video-playerResult of Result of Shock Test for a VideoShock Test for a Video--playerplayer

A hook of a gear comes off. Legs of a coupler break.

Stoppers of a front frame come off.A front panel breaks.

TestNo.

Am/s2

⊿Vm/s

⊿Tms

Observations

1 1180 1.42 2.10 No damage

⊿VcTest

2 1800 2.01 1.95 No damage

3 2280 2.89 2.10 No damage

4 2940 4.09 2.45 No damage

5 4100 4.96 2.05 Gear, Coupler, Panel, Frame

6 199 5.51 28.2 No damage

AcTest

7 389 5.48 14.5 No damage

8 596 5.39 9.55 No damage

9 772 5.52 7.56 Gear, Coupler

10 951 5.38 6.16 No damage except for the above


Thank you very much

for your kind attention.

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