calculate the push back reaction force on a rubber gasket design

1. Silicone Rubber Gasket
Nonlinear Force – Displacement
Analysis
08/03/17 rev A
Don Blanchet
3B Associates
dwb3298@verizon.net

2. Analysis method
 Solidworks Simulation 2015
 Nonlinear static analysis
– Nonlinear material properties
– Buckling geometric nonlinearity
 Solution is calculated 50 times at
equally spaced steps

3. Incompressibilty
 Rubber compounds behave much like
fluids when compressed their volume
essentially remains unchanged leading
to bulging behavior.
 Poisson’s ratio is set at 0.495 very
close to the theoretical maximum of
0.500

4. Model
Silicone
rubber
.010 rigid
plate

5. Model

6. Meshed model

7. Material properties derived
from published data

8. Loads and restraints
Fixed surface
Push this surface 0.035 in –Z direction
Loading plate

9. Result for - LIM6050-50 durometer

10. Displacement

11. Max displacement
Including sliding &
buckling

12. Stress
Max rubber stress
Including sliding &
Buckling
234 psi
Strength at tear
700-800 psi

13. Rev A
 Change to 70 durometer silicone
rubber

15. Result for - 70 durometer

16. Result for - 70 durometer