Issues in Structural Analysis of Gasket (Si) and Subgasket (PEN)

julia4567

Hello,

250212- TEST-3-complete.fem

I am working on a structural analysis involving a Gasket (Si) on the top and a Subgasket (PEN) on the bottom. Based on the analysis results (attached images), I have a few questions and would appreciate your insights:

1. How can I verify if the analysis has been performed correctly and if the results are reliable?
   I want to ensure the simulation is accurate and trustworthy. Are there specific checks or validation steps I should follow?
2. The Subgasket shows different deformation behavior compared to the Gasket.
   While the Gasket appears to bulge outward as expected under compression, the Subgasket does not show similar lateral expansion, despite having comparable material properties. What could be the reason for this difference in deformation behavior? Could it be due to boundary conditions, material modeling, or contact settings?
3. Measuring thickness variation in the Subgasket:
   In the contour plot, the central area of the Subgasket shows high strain (red zones), indicating thinning due to compression. Is there a method in HyperView or OptiStruct to measure the thickness at specific points or along a section to quantify this deformation?

The analysis model is attached for reference.

Thank you in advance for your support and guidance!

GTT Johan

Hi Julia
1) Normaly one do a convergence study using different mesh sizes and investigate the difference. At some level one define that the resolution is acceptable for the current problem. In your case I think the defined mesh is good enough to evaluate, perheps some more layers in the sub-gasket!

2) It looks fine out, the Gasket is defined with a hyperelastic material and due to poissons ratio it will bulb much more, also it compressed much more. Subgasket is a lot stiffer I would say!

3) In hyperview you can right click in the entity window and select create/Measure/ and the select distance between nodes

//Johan