User subroutine to define multi-point constraints.

User subroutine MPC:

  • is called to impose a user-defined multi-point constraint and is intended for use when general constraints cannot be defined with one of the MPC types provided by Abaqus/Standard;

  • can use only degrees of freedom that also exist on an element somewhere in the same model (methods for overcoming this limitation are discussed below);

  • can generate linear as well as nonlinear constraints;

  • allows definition of constraints involving finite rotations; and

  • makes it possible to switch constraints on and off during an analysis.

The following topics are discussed:

Related Topics
In Other Guides
General multi-point constraints