i = = i

Get/set the plasticity state indicator (sum of integer values).

0       elastic
1       matrix shear currently at yield
2       matrix tension currently at yield
4       matrix shear yield in past
8       matrix tension yield in past
16     ubiquitous joint currently at shear yield
32     ubiquitous joint currently at tensile yield
64     ubiquitous joint shear yield in past
128   ubiquitous joint tensile yield in past

These are the states corresponding to the most commonly used constitutive models. Other states are possible. See the Constitutive Models for details.

Returns:i - plasticity state indicator
Accepts:i - plasticity state indicator
Arguments:bzp - block zone pointer