Product: Abaqus/Standard
Benefits: You can now relax or completely remove contact constraints on all points in contact (i.e., with a “closed” status) depending on the local base state contact pressure during linear perturbation steps in Abaqus/Standard.
Description: Both normal and tangential constraints are affected. Two pressure coefficients, 
and 
, are provided to control the feature. For contact pressures less than in the base state (as established in the prior general, non-perturbation step), the contact constraints are not enforced in the perturbation step. For base-state contact pressures greater than , the contact constraints are fully enforced in the perturbation step, as in past releases of Abaqus/Standard. Transition between no enforcement and full enforcement occurs for base-state contact pressures between and .