Flashlight Bulb Explosive Study

Author: Geoffrey Burke

Company: 3RD

Date: March 4, 2004

  1. Introduction
  2. File Information
  3. Materials
  4. Load Information
  5. Study Property
  6. Stress Results
  7. Deformation Results
  8. Design Check Results
  9. Conclusion
  10. Appendix

Flashlight Assembly Battery explosive animation Study


1. Introduction



Halogen Bulb ExplosionStudy


2. File Information



Flashlight Assembly Model eDrawing: Flashlight Assembly
Model name: Bulb
Deformation Model eDrawing Bulb Deformation
FOS Model eDrawing Bulb Failure Analysis
Stress Study eDrawing COSMOSXpressStudy

eDrawing Plugin

3. Materials


No. Part Name Material Mass Volume
1 Bulb User Defined 0.00516056 kg 2.09984e-006 m^3



4. Load Information



Restraint
Restraint1 <Bulb> on 1 Face(s) immovable (no translation).
Description:


Load
Load1 <Bulb> on 2 Face(s) apply normal force 0.5 lb using uniform distribution
Description:


5. Study Property

Mesh Information
Mesh Type Solid mesh
Mesher Used: Standard
Automatic Transition: Off
Include Mesh Controls: Off
Smooth Surface: On
Jacobian Check: 4 Points
Element Size: 1.2811 mm
Tolerance: 0.064055 mm
Quality: High
Number of elements: 7145
Number of nodes: 11006



Solver Information
Quality: High
Solver Type: FFE


6. Stress Results



Name Type Min Location Max Location
Plot1 VON: von Mises stress
7.72222 N/m^2
(5.56285e-007 m,
4.14724e-007 m,
0.0373934 m)
42093.1 N/m^2
(-0.00310269 m,
-0.00112398 m,
0.0116937 m)



Bulb-COSMOSXpressStudy-Stress-Plot1
JPEG
VIEW






7. Deformation Results



Plot No. Scale Factor
1 5.5034e+005



Bulb-COSMOSXpressStudy-Deformation-Plot2
JPEG
VIEW

8. Design Check Results



Bulb-COSMOSXpressStudy-Design Check-Plot3
JPEG
VIEW



9. Conclusion


Part Destroyed with numorus fragmentation

10. Appendix

Material name: User Defined
Description:
Material Source Input
Material Model Type Linear Elastic Isotropic
Unit system: SI

Property Name Value
Elastic modulus 6.8935e+010 N/m^2
Poisson's ratio 0.23
Yield strength 1.39 N/m^2
Mass density 2457.6 kg/m^3

Note:

COSMOSXpress design analysis results are based on linear static analysis and the material is assumed isotropic. Linear static analysis assumes that: 1) the material behavior is linear complying with Hooke’s law, 2) induced displacements are adequately small to ignore changes in stiffness due to loading, and 3) loads are applied slowly in order to ignore dynamic effects.

Do not base your design decisions solely on the data presented in this report. Use this information in conjunction with experimental data and practical experience. Field testing is mandatory to validate your final design. COSMOSXpress helps you reduce your time-to-market by reducing but not eliminating field tests.