ELASTICITY

Description

An ELASTICITY behavior object is actually just an alias for COEFFICIENT_MATRIX. The class is frequently defined in the behavior descriptions however to further accentuate its task in the scheme of the constitutive relation. Virtually every location where this keyword is used, a hypoelastic relation is employed:

(388)\[\ten \sigma = \tenf D_{el}:\ten \varepsilon_{el}\]

Noting however that the total internal strain \(\ten \varepsilon_{el}\) may be calculated in some manner which extends it from the normal limitations of hypoelasticity (e.g. the finite strain material transformations).

The matrix \(\tenf D_{el}\) is the elasticity matrix defined by the ELASTICITY class, and can take many forms, and vary according to any external parameter.