**propag_crack

Description

This command is used to grow 3D cracks described by an explicit mesh of the discontinuity. It verifies various conditions in order to preserve mesh’s geometry.

Syntax

The command has the following syntax:

**propag_crack \(~\,\) *crack front-nset-name lip0-nset-name lip1-nset-name ext-nset-name \(~\,\) [ *ask_speed_to crack-component-name ] \(~\,\) [ *open opening-value] \(~\,\) [ *close]

*crack

gives various nsets describing crack geometry: front nodes, first and second lips nodes. Last nset gives initial and final crack front nodes for opened cracks.

*ask_speed_to

gives the name of the crack-front-component which impose the front advance.

*open

is used to separate the lips with a given distance. This makes the remeshing process easier for the volume automatic mesher.

*close

is used to collapse the lips (after remeshing if open command has been previously used).