Intersonic crack propagation in an orthotropic material

摘要

Intersonic crack propagation is found to exhibitessentially the same features in orthotropic and isotropicmaterials, provided that the crack propagates along a plane ofelastic symmetry. Thus the stress and strain singularity at thecrack edge is weaker than the inverse square root singularity inthe sub-Raleigh case, except at one distinct velocity. The energyflux into the process region is determined by using the Barenblattmodel. It depends on the crack velocity and on the size of theprocess region, approaching zero with this size.