2007 Volume 1 Issue 4 Pages 584-591
The anti-plane shear crack in a finite thickness plate is analyzed by the continuously distributed dislocations model and the stress intensity factors are calculated. The results are compared with those in an infinite thickness plate. It is found that the larger the ratio of the crack length to the plate thickness is, the larger the stress intensity factor is and that the Mode II component accompanies with the Mode III component, which does never appear in an infinite thickness plate. The Mode II stress intensity factor appears strongly near the plate surfaces and vanishes at the center of the plate in the thickness direction. This indicates the crack surface inclines steeply near the plate surfaces and does not incline at the center.
