Deviatoric stress-strain: "deviatoric_strain"

Input

Reading an stress model of unknown type, the name is read first, followed by the data for that type. After the stress model, control data is read then finally a scalar equation of state.

In other words: 

type
parameters
maximum_plastic_strain_per_subcycle (e.g. 0.01)
minimum_angle_for_rotations (e.g. 1.0e-6)
equation_of_state (see EOS documentation)
The maximum plastic strain increment is used to control subcycling of the strain integration algorithm. The minimum angle is used to decide when material rotation can be ignored.

Specific stress model types

State

eos_state
elastic_strain_deviator (real 6-vector)
equivalent_plastic_strain (real)