Dislocations emitted from a blunt crack tip in a piezoelectric material

摘要

The problem of a piezoelectric screw dislocation emitted from a blunt crack is dealt with inthis paper.Since dislocations are generated in pairs,dislocations of one sign are driven away fromthe crack tip due to high stress level,while the dislocations of the opposite sign are left at theblunt crack surface.Therefore the solution depends on how the residual dislocation distributs atthe crack surface.For an arbitrary distribution of the residual dislocation,the general solutionsare derived in series-form.