PARAM, KTPLAST
Bulk Data Entry Beneficial for problems involving a combination of plasticity, contact, and pretension.
Parameter | Values | Description |
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KTPLAST | <1 ≤ N ≤ 10000> No default Defaults:
|
PARAM,
KTPLAST, N: The elastic stiffness matrix is used for the first N nonlinear iterations, at each load step. After the first N nonlinear iterations, a consistent elasto-plastic stiffness matrix is used. This allows OptiStruct to hold the element tangent stiffness matrix fixed until the contact nearly converges, and then switch to the standard elasto-plastic formulation. |
Comments
- PARAM, KTPLAST, N is beneficial for problems involving a combination of plasticity, contact, and pretension.
- Currently, PARAM, KTPLAST, N is only supported for solid elements in small-displacement analysis.
- It should be used in conjunction with PARAM, EXPERTNL, NO.