Stress analysis of MS-Main_Pressure_Vessel





Author: M.BROWN


Company: MBARI


Date: 10/31/03



  1. Introduction
  2. Description
  3. File Information
  4. Materials
  5. Load & Restraint Information
  6. Study Property
  7. Stress Results
  8. Strain Results
  9. Displacement Results
  10. Deformation Results
  11. Design Check Results
  12. Conclusion



1. Introduction



The FEA analysis shows the current design meets criteria for pressure vessels
established by MBARI.
The MBARI factor of safety for stress = 1.5 Y.S. the results show approxiamtely 2.25.



2. Description



The pressure vessel is a titanium 6AL-4V material.
The pressure at desired operating depth of 4000m is approxiamtely 6000psi.



3. File Information



Model name: MS-Main_Pressure_Vessel
Model location: C:\Documents and Settings\M.Brown-2003\Projects-2003\Mass Spectrometer\MS-Main_Pressure_Vessel.SLDPRT
Results location: C:\DOCUME~1\mob\LOCALS~1\Temp
Study name: ISMS 400m




4. Materials



No. Part Name Material Mass Volume
1 MS-Main_Pressure_Vessel MS-Main_Pressure_Vessel-Centor library 86.2779 lb 537.179 in^3



5. Load & Restraint Information



Restraint
Restraint-1 <> on 1 Face(s) with displacement 0 in along radial. displacement 0 in along circumferential. displacement 0 in along axial.
Description:
Restraint-2 <> on 1 Face(s) with displacement 0 in along radial.
Description:


Load
Pressure-1 <> on 7 Face(s) with Pressure 6000 psi along direction normal to selected face
Description:




6. Study Property



Mesh Information
Mesh Type: Solid mesh
Mesher Used: Standard
Automatic Transition: Off
Smooth Surface: On
Jacobian Check: 4 Points
Element Size: 0.81303 in
Tolerance: 0.040652 in
Quality: High
Number of elements: 8626
Number of nodes: 17098



Solver Information
Quality: High
Solver Type: FFEPlus








7. Stress Results



Name Type Min Location Max Location
Plot1 VON: von Mises stress
1255.16 psi
Node: 2906
(-2.32787 in,
-4.2833 in,
15.5 in)
46936.6 psi
Node: 278
(0.514381 in,
-3.84071 in,
-11.6588 in)



MS-Main_Pressure_Vessel-ISMS 400m-Stress-Plot1
JPEG
VIEW






8. Strain Results



Name Type Min Location Max Location
Plot1 ESTRN : Equivalent strain
7.60934e-005
Element: 224
(-2.21601 in,
4.22646 in,
15.625 in)
0.00240554
Element: 5953
(3.29101 in,
-2.07964 in,
11.3345 in)



MS-Main_Pressure_Vessel-ISMS 400m-Strain-Plot1
JPEG
VIEW






9. Displacement Results



Name Type Min Location Max Location
Plot1 URES: Resultant displacement
0 in
Node: 119
(3.8765 in,
0 in,
14.875 in)
0.0175553 in
Node: 159
(3.875 in,
0 in,
-12.4628 in)



MS-Main_Pressure_Vessel-ISMS 400m-Displacement-Plot1
JPEG
VIEW






10. Deformation Results



Plot No. Scale Factor
1 200.99



MS-Main_Pressure_Vessel-ISMS 400m-Deformation-Plot1
JPEG
VIEW






11. Design Check Results



MS-Main_Pressure_Vessel-ISMS 400m-Design Check-Plot1
JPEG
VIEW






12. Conclusion



The curent design meets the specification requirements.