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7.16 Package FL.ELASTICITY

Defines elasticity problems.

Class: <ELASTICITY-PROBLEM>

An elasticity problem is a special instance of an elliptic sytems.

Superclasses: <ELLSYS-PROBLEM>

Function: CHECK-ELASTICITY-TENSOR TENSOR DIM &OPTIONAL (THRESHOLD 1.e-6)

Checks the symmetries in the elasticity tensor.

Function: ISOTROPIC-ELASTICITY-TENSOR &KEY DIM LAMBDA MU

Returns the tensor corresponding to the Lam’e constants lambda and mu, i.e.:

A_{ij}^{kl} = lambda delta_{ik} delta_{jl} + mu (delta_{ij} delta_{kl} + delta_{kj} delta_{il}).