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Explicit Cracks in MPM
Defining Explicit Cracks in MPM Calculations
Cracks in MPM calculations are implemented using the CRAMP algorithm first described by Nairn (developer of this software) and coworkers. The commands in this section are for defining 2D cracks. 3D cracks are in development and can be tried to 3D simulations now. Details on defining 3D cracks are currently only on OSUPDocs.
These commands customize the crack settings and control crack propagation:
- ContactCracks: Set default crack contact conditions.
- Propagate: Set rule for crack propagation and optional propagation direction.
- AltPropagate: Set a second rule for crack propagation and optional propagation direction for models with competing fracture modes.
- PropagateLength: Determines the amount of crack growth each time the crack propagates.
- ContactPositionCracks: Determines method for detecting contact when using particle displacements.
- JContour: Used to set some options for the J Integral calculation.
- MovePlane: Used to set how crack plane particles move.
- Traction Laws: Explicit crack can add traction laws to model cohesive zones.
A few deprecated commands have old options for setting crack contact mechanics.