Elasticity Preconditioner

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Konrad Simon

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Sep 24, 2021, 8:17:33 AM9/24/21

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Dear all,

A student and me are trying to deal with (parallel, static) linearized elasticity similar to step-8.

However, the problem is slightly different since the Lame parameters are functions instead of constants.

Can anyone recommend good solvers & preconditioners for the resulting system? Our boundary conditions fix all degrees of freedom in the kernel.

Best,
Konrad

Michał Wichrowski

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Sep 24, 2021, 8:36:45 AM9/24/21

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The simple answer is multigrid. But depending on how the problem looks like it will differ. If it is far from being incompressible standard MG will be fine. Trilinos AMG should also work, just take look at its settings (there is an option to specify that you are dealing with vector problem).