Abstract
For the situation of plane strain, yielding from an embedded crack with finite root-radius and loaded in uniform tension has been studied. The plastic zone was represented by a coplanar array of edge dislocations and the equilibrium equations were solved numerically. Approximate analytical formulae for the dependence of the plastic-zone size and of the crack opening displacement on the ratio of the applied and friction stresses were constructed. A comparison of the results with those for the situation of anti-plane strain has been made and application of these results to the study of crack initiation from a blunt notch and of fracture toughness discussed.
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