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Improved Arc Length Control Method for Nonlinear Contact Analysis

You can analyze the buckling behavior of any structure more accurately with the inclusion of no penetration contacts between components that may come into contact during the analysis.

The Arc Length Control method supports nonlinear static studies with no penetration contact definitions. 2D Simplification Nonlinear studies also support the improved Arc Length Control Method.

The table lists the features supported by the Direct Sparse and Intel Direct Sparse solvers for each Control method.
  Force Control Displacement Control Arc Length Control
Force Yes Yes Yes
Prescribed Displacement Yes No No
No Penetration Contact Yes No Yes
Force + Prescribed Displacement Yes No No
Prescribed Displacement + No Penetration Contact Yes No No
Force + No Penetration Contact Yes No Yes
Force + Prescribed Displacement + No Penetration Contact Yes No No
Neither the Arc Length nor the Displacement Control method can resolve rigid body motions that can occur during a nonlinear solution. If you encounter a rigid body motion during a nonlinear analysis, use the Force Control method with a Prescribed displacement to improve chances of reaching convergence.


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