Plastic Strain Magnitude (PEMAG)

For most materials and only proportional loading, PEMAG is equal to Equivalent Plastic Strain (PEEQ). It is available only with Abaqus sensitivities.

This page discusses:

Parameter Name

Formula

PEMAG

 23εpl:εpl

Analysis Types: Static Nonlinear Analysis

For the plastic strain magnitude, the following table shows the allowed combinations between strategy and the items OBJ_FUNC and CONSTRAINT with C for controller-based optimization and S for sensitivity-based optimization.

TOPO

SHAPE

BEAD

SIZING

OBJ_FUNC

S

S

S

S

CONSTRAINT

S

S

S

S

Remarks

  1. Only elements of the element group (EL_GROUP) are applied in the calculation of the plastic strain magnitude.
  2. PEMAG as a design response needs a plastic material property to work. If no such property is defined, Tosca Structure exits with an error.

Definition

The design response (DRESP) for PEMAG is defined like:


DRESP
 ID_NAME  = DRESP_PEMAG
 DEF_TYPE = SYSTEM
 TYPE     = PEMAG
 EL_GROUP = element_group
END_