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Hydraulic Manifold BlockFEA Sample 1
FEA ReportApril 10, 2007
XYZ Vessel Corp.
Pressure Vessel Engineering Ltd.PVE-1343a
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Table of Contents Page 2 of 17
Contents PageCover 1Table of Contents 2Summary 3Material Properties 4Model - With Pipes 5Model - No Pipes 6Mesh 7Boundary Conditions 8Loads 9Reaction Forces 10Error Plots - No Pipes 11Displacement Plots - With Pipes 12Displacement Plots - No Pipes 13Material Stress Limits 14Stress Plots - With Pipes 15Stress Plots - No Pipes 16Component Cycle Life 17
1 FEA Analysis Summary Page 3 of 172
3 Project Information:4 Customer5 Vessel6 Part Number7 Master Drawing8 Job9 FEA Model File10 FEA Model Drawing11 FEA Program Used
Date12
Design Conditions:Max Internal Pressure (psi)
300Max Operating Temp (F)
250
13 Code:14
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16 Material Allowables:17
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19 Goal:20
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26 Results:27
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33 Conclusion:34
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XYZ Vessel Corp.Hydraulic Manifold Block
FEA Sample 1FEA Sample 1
Maximum Allowed Working Pressure
Maximum Design Metal Temperature@ Pressure (psi)Min Operating Temp (F)
0
-20 300
@Temperature (F)
250Max External Pressure (psi)
ASME IID, 2004 EDD, 2006 ADD
ASME VIII-1, 2004 EDD, 2006 ADD
PVE-1343aHyd Manifold.SLDASMHyd Manifold.SLDDRW
10-Apr-2007SolidWorks CosmosWorks 2007
Determine if the Hydraulic Manifold Block is acceptable for use at 300 psi @ 250°F according to VIII-1 rules. Due to the shape of the body ASME VIII-1 calculations are not used. ASME VIII-2 is used to interpret the results produced by the FEA. ASME VIII-1 material allowables are used.
The peak stress in the Hydraulic Manifold Body is found at the junction between Port 3 and Port 4 inside the body. This peak stress is 2,949 psi. The allowable stress value for SA-479 316 stainless bar is 20,000 psi. The stress is below the membrane allowable stress.
The peak measured stress is less than the allowable membrane stress for the material. The design is acceptable.
1 Material Properties ver 2.01 www.pveng.com 27-Apr-07 Page 4 of 172
3 <- Vessel4
5 Design Pressure UG-22(a)6 300.0 <- P, internal operating pressure at top of vessel (psig)7 0.0 <- mPa, external operation pressure8 Oil <- Operating Fluid Turpentine Oil9 0.000 <- h, fluid height (ft) 10 0.940 <- rho, fluid density (1.0 for water) 11 Design Pressure = P + 0.4331*rho*h = 300 + 0.4331 * 0.94 * 0 mDp = 300.012
13 Material Properties (ASME IID)14 250 <- mTemp, design temp ºF Test at ambient temp
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Where Used Ambient Strength
Design Strength
Strength Ratio
Max ºF Ext Graph
16 Body 20000 20000 1.000 1500 HA-217
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Material
SA-479 316 Bar
Hydraulic Manifold Block
1 Model Ver 4.05 Page 5 of 172
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Manifold With Pipes - Overall Dimensions
Manifold With Pipes - Overall Dimensions(All pipes are modelled at sch 40 wall thickness)
1 Model Ver 4.05 Page 6 of 172
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Manifold - Overall Dimensions
Manifold - Overall Dimensions(See Appendix 1 of this report for detailed drawing "Hydraulic Manifold - Body ")
(The threaded holes are modelled to NPT sizes)
1 Mesh Size Ver 4.05 Page 7 of 172
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43 Mesh Type:44 Element Shape:45 Integration Order:46 Component E v Comment47 2.80E+07 0.27 AISI 316 SS from Cosmos Matl Lib48 2.80E+07 0.27 AISI 316 SS from Cosmos Matl Lib49
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Solid 3d MeshTetrahedral2nd Order or Greater
0.25Pipes
1/4" mesh size used for the analysis
1/4" mesh size
BlockMesh Size
0.25
1 Boundary Conditions Ver 4.05 Page 8 of 172
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Fixed boundary
Fixed boundary condition applied to ZY face of one pipe
1 Loads Ver 4.05 Page 9 of 172
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300 psi pressure applied to inside the manifold and pipes.
300 psi pressure applied to inside the manifold and pipes.Note: the body has been sectioned for clarity.
1 Reaction Forces Ver 4.05 Page 10 of 173
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Reaction forces are all on the fixed faceReaction forces are correct for this model
X reaction force = 1007.3 Ibs = pressure x area (300 x 3.3577 sq in) = correctY Reaction force = 2.589 Ibs ≈ 0 IbsZ Reaction force = -0.786 psi ≈ 0 Ibs
1 Error Plot Ver 4.05 Page 11 of 173
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Error plot for the body only - the error is shown at less than 1%
Error plot - Body Only - Energy Norm ErrorError is less than the 5% error target
1 Displacement Plot Ver 4.05 Page 12 of 173
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Bottom Displacement PlotDisplacement is acceptable
Displacement Plot - (inches)Max displacement = 0.00017 inch
Magnification Factor = 8144x
1 Displacement Plot Ver 4.05 Page 13 of 173
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Displacement plotDisplacement is acceptable
Displacement plot(pipes are hidden)
1 Stress Limits ver 4.01 Page 14 of 172 ASME VIII-2 2005 ADD3 Vessel4 Description5 Model Inputs:6 1.0 k - Stress Intensity Factor7 Hyd Manifold.SLDASM Model - File Name
8 Material Inputs:9 SA-479 316 Bar Material10 20000 Sa - Allowable Stress
11 General Stress Limits: Pm=Membrane Stress , Pm+Pb=Membrane Stress + Bending Stress12 Pm [psi] = k*Sa 1*20000 = 2000013 Pm+Pb [psi] = 1.5*k*Sa 1.5*1*20000 = 3000014 Local Stress Limits: Pl=Membrane Stress , Sps=Membrane Stress + Bending Stress15 Pl [psi] = 1.5*k*Sa 1.5*1*20000 = 3000016 Sps [psi] = 3*k*Sa 3*1*20000 = 6000017
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Hydraulic Manifold BlockMaterial Stress Allowables
Note:1. The stress results are Tresca as per ASME VIII-2, App 4 & 5.2. These limiting allowable stresses will be used through this report for design validation purposes.3. The peak measured stress is below the general membrane limit. Separation of stresses into membrane/bending and local/general is not required.
1 Stress Plot Ver 4.05 Page 15 of 173
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General Stress Plot - Body and Pipes - Intensity (Tresca)
General Stress Plot - Body and Pipes - Intensity (Tresca)(See next page for Body only Stress value)
1 Stress Plot Ver 4.05 Page 16 of 173
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General Stress plot - Intensity (Tresca)Stress is acceptable
General Stress plot - Body Only - Intensity (Tresca)Max (psi) = 2949 (peak). Allowable general membrane = 20,000 psi
Stress is acceptable, no linearization is required
1 Cycle Life ver 4.04 Page 17 of 172 ASME VIII-2 2004 Ed. 2006 Add, Appx. 5
3 CL_Fig511022A graph - Select graph4 2,948 Str [psi] - Enter stress value5 25,900,000 ET [psi] - Modulus of elasticity at operating temperature
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30 Salt [psi] = 1/2 * Str 1/2 * 2948 = 1,47431 EG [psi] = PVELookup("EgTable","Lookup","Eg",graph) 28,300,00032 Se [psi] = Salt*EG/ET 1474*28300000/25900000 = 1,61133
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54 Cycles = PVELookup(graph,"CycleLifeLookup",Se) 100,000,000,000
Life cycle analysis was performed for the highest stress found in the body. The predicted cycle life is infinite.
Stress vs. Cycles
1,000
10,000
100,000
1.0E
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Cycles
Stre
ss
