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Pure shear model verification in Comsol, using Mooney-Revlin material, unconverge problem
Posted Jun 10, 2010, 10:09 a.m. EDT 0 Replies
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I am trying to verify a pure shear problem in Comsol and try to compare with analytical solution.
It is a simple cubic model, it works for linear elastic material, but not work if use Mooney-Revlin model.
It's always unconverged.
According to my understanding, pure shear means that for incompressible material,
lambdas are principle stretches,
lambda1 = lambda, lambda2 = 1, lambda3 = 1/lambda
Thus in the cubic model, prescribed a displacement along x-direction, fixed boundaries along y direction in order to get a pure shear boundary conditions.
It works for linear elastic, thus I think there should be no problem with the boundary conditions, but when I use Mooney-Revlin material, or when turn on large-deformation for linear elastic model,
it always
Error:
Failed to find a solution:
No convergence, even when using the minimum damping factor.
Returned solution has not converged.
I attached the simple model.
Would be appreciate for any suggestions.
Thanks a lot.
Xiaogai Li
Hello Xiaogai Li
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