Highly Nonlinear Shape Optimization

For highly nonlinear calculations, the stress measure is not always a good indicator, for example, a structure under plastic deformations will (for ideal plastic) have a large constant stress over the plastic area. For this reason, most analysts use a strain measure to inspect these areas.

Tosca Structure.shape optimization supports different strain measures for this purpose, currently only supported by Abaqus and ANSYS®.

This task shows you how to:

Define a strain measure in Tosca Structure.gui

  1. Choose Command > DRESP.
    The DRESP menu appears.
  2. Choose STRAIN_TOTAL as type as shown in the following figure:

Tosca Structure Parameter File

The resulting command in the parameter file look like follows: 


DRESP
 ID_NAME        = MY_DRESP
 DEF_TYPE       = SYSTEM
 TYPE           = STRAIN_TOTAL
 ND_GROUP       = design_nodes
 LC_SET         = ALL,1,All
 GROUP_OPER     = Max
END_