Crack Settings

These command control modeling of explicit cracks and whether or not those cracks propagate

Introduction

The extension of MPM to model explicit cracks is called CRAMP. It is described first in a paper by Nairn (2003).^[1].

Crack Settings Commands

In scripted files, crack properties are controlled by these possible commands

(Crack Propagation Commands)
Friction
Imperfect Interface
JContour
ContactPosition
MovePlane

In XML input file, all global crack setting commands are within a <Cracks> element that must be within the <MPMHeader>:

<Cracks>
  (Crack Propagation Commands)
  <Friction>0.3</Friction>
  <JContour type='1' size="2" terms="1"/>
  <ContactPosition>0.8</ContactPosition>
  <MovePlane type='avg' prevent='no'/>

</Cracks>

The Crack Propagation Commands are described in a separate help top. The other commands are describe in the following sections.

Crack Contact Properties

J Integral Contour Settings

Crack ContactPosition Command

Crack Plane Updating

Notes

References

↑ J. A. Nairn, "Material Point Method Calculations with Explicit Cracks";</a> Computer Modeling in Engineering & Sciences, 4, 649-664 (2003).

[CRAMP-1] J. A. Nairn, "Material Point Method Calculations with Explicit Cracks";</a> Computer Modeling in Engineering & Sciences, 4, 649-664 (2003).

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