3.1.5.32. MinMax Material Wrapper

This command is used to construct a MinMax uniaxial material wrapper. The wrapper forwards strain to the wrapped material and returns its stress and tangent until the material strain goes above a maximum or below a minimum. Once that condition is met in commitState(), the wrapper stops updating the wrapped material (the material is treated as failed).

uniaxialMaterial MinMax $matTag $otherTag <-min $minStrain> <-max $maxStrain>

Argument	Type	Description
$matTag	integer	unique material tag
$otherTag	integer	tag of a previously-defined UniaxialMaterial
$minStrain	float	(optional) minimum strain; default -1.0e16
$maxStrain	float	(optional) maximum strain; default 1.0e16

Note

After the strain limit is exceeded, the wrapper no longer calls the wrapped material.

Example

1. Tcl Code

uniaxialMaterial Hardening 1 3.0 1.0 0.1
uniaxialMaterial MinMax 2 1 -min -0.8

2. Python Code

ops.uniaxialMaterial('Hardening', 1, 3.0, 1.0, 0.1)
ops.uniaxialMaterial('MinMax', 2, 1, '-min', -0.8)

Code developed by: Michael H. Scott