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group_integration_points index switch

This record can be used for -quad4 and -hex8 elements in combination with the initialization of materi_velocity.

If switch is set to -yes, a 'modified B-matrix' approach is used to calculate the volume part of the strains. In this way, volume locking of the finite element for nearly incompressible material behaviour is prevented.

This option typically is usefull for plasticity analysis, rubber analysis, etc. where the material behavior is nearly incimpressible. Default, switch is set to -no.

The index specifies the element_group, see element_group.



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1999-04-23