PLANE STRESS DYNAMIC FIELDS NEAR A PROPAGATING CRACK-TIP IN A POWER-LAW MATERIAL

Based on the plastic-dynamic equations, the asymptotic behaviour of the near-tip fieldsfor a plane stress tensile crack propagating in a power-law material has been studied in this paper, It isshown that the stress and strain singularities are, respectively, of the order （In A/r）;and（In A/r）;.where A is a constant which is related to the size of plastic region, r is the distance to the crack tip, n isthe power-law exponent.