Main Help → All Commands → Explicit Cracks → GrowCrack
The GrowCrack
command is used when defining cracks in an MPM problem.
GrowCrack (x2),(y2),<(mat)>,<(tract)>
where
(x2)
and (y2)
define the coordinates of a point along the crack (or (R,Z) coordinates if axisymmetric) in length units.(mat)
can be used to define a material ID for a previously defined material that contains the crack tip at the end of the crack or can be "exterior
" to indicate a crack to the edge of the body (see OSUPDocs wiki for details on "exterior
" cracks). Crack propagation is only possible when a crack tip has a material ID. If the material ID is omitted, the MPM calculations will correctly model that crack, but no propagation or fracture parameter calculations will occur. A crack tip material is only needed if the GrowCrack
command is the last crack definition command for the current crack.(tract)
can assign a traction law to the new crack particle. Set (tract)
to a material ID for a previously defined traction law material. To set a traction law material but no crack tip material in (mat)
, set (mat)
to "0" (or any invalid material ID).GrowCrack
command is only allowed for MPM analyses.