Some material cards of *HYPERELASTIC
are supported as design elements, see also the figure below.
ARRUDA-BOYCE
MOONEY-RIVLIN
NEO HOOKE
OGDEN
POLYNOMIAL
REDUCED POLYNOMIAL
VAN DER WAALS
YEOH
Not supported as design elements:
MARLOW
USER
Using the TEST DATA INPUT parameter in *HYPERELASTIC
(that is usually followed by *UNIAXIAL TEST DATA or
other test data) is not allowed.
The material card *PLASTIC is supported as design
element, see also the figure below. Supported for the type HARDENING=ISOTROPIC
(default). A main limitation is that each material point (gauss point)
is only allowed to be unloaded once and it should not be elastic-plastic
again. Meaning that cyclic loading is not supported.
*CONCRETE is supported for design elements
The material card *HYPOELASTIC is support as design
element, see also figure the following figure.
Some of the *PLASTIC (a), *HYPOELASTIC (b) and *HYPERELASTIC (c) cards in Abaqus are supported for design elements.
Dependency of temperature or other field variables (Parameter DEPENDENCIES).
For topology and sizing optimization, only uniform shell thickness is allowed for the
design domain elements. Composite shell sections with a single ply are
also allowed.
Shape Optimization
For shape optimization, composite shell sections with multiple plies are supported.
Bead Optimization
For shape optimization, composite shell sections with multiple plies are supported.
Also supported are single value thickness and offset definitions per *SHELL
SECTION,no distribution definitions.
For topology and sizing optimization, elements with *BEAM GENERAL SECTION property are not allowed in the design domain.
A work-around is to define an equivalent *BEAM SECTION property for these elements or to remove them from the optimization domain.
Remark
The use of nonlinear materials in an optimization is only permitted
for users of the Tosca Structure.nonlinear.
license. This applies for the commands and parameters below:
If no license is held for this mode, the optimization stops once the parameters
or commands listed above are used. This does not apply if a linear perturbation step is used.