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Active strain #126

Closed drwells closed 1 year ago

drwells commented 1 year ago

To make things work with FCH we need a way to specify the active strain. I don't yet fully understand the mechanics but it amounts to, ultimately, computing an additional tensor FF_A s.t. we use PK1(FF) * FF_A^-1 to compute the load vector instead of just PK1(FF).

These should be supplied to Parts and then propagated down to compute_load_vector().

drwells commented 1 year ago

Fixed by #130.

The original problem description is wrong - we need to modify FF and dependent quantities. Fortunately MechanicsValues can be easily modified to this end.