biomedman
Bioengineer
- Apr 7, 2002
- 5
I am working on rubber bushing, consisting of two metal plates and a sandwiched layer of rubber. I am using ABAQUS to run the FEA models to optimize the bond geometry to reduce the stresses. I have run two cases so far
Design-1: Straight walled rubber
Design-2: Concavity on the wall
In pure compression, I see design-2 giving the same stiffness as design-1 and also higher von-mises stresses. I would have expected things to be exactly opposite of this since design-2 has less material. Since design-2 is commonly used in the rubber industry for such applications, I fund the results very surprising. I have checked the model and also tried different depths on the concavities but see the same kind of results, higher stress and same stiffness.
Any ideas as to why this could be happening? Does the geomtry of the structure have to play a part? The profile of the bushing is like the letter "D"
Thanks for your help
Design-1: Straight walled rubber
Design-2: Concavity on the wall
In pure compression, I see design-2 giving the same stiffness as design-1 and also higher von-mises stresses. I would have expected things to be exactly opposite of this since design-2 has less material. Since design-2 is commonly used in the rubber industry for such applications, I fund the results very surprising. I have checked the model and also tried different depths on the concavities but see the same kind of results, higher stress and same stiffness.
Any ideas as to why this could be happening? Does the geomtry of the structure have to play a part? The profile of the bushing is like the letter "D"
Thanks for your help
