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Damage zone length limit during the dislocation-crack interaction under shearing mode

In this paper, limiting the damage zone length in mode II during the interaction between a main crack and a surrounding dislocation in a brittle material is considered. This study is mainly based on the strain and stress field generated by varying the distance between the dislocation and a main crack by taking into consideration several cracks’ length.The proposed model is a dish element having an edge crack surrounded by an arbitrarily dislocation anduniformly loaded under the shearing mode II. The problem is then analyzed using Finite Element Method (FEM) along with the software ABAQUS. For each distance between the main crack and the dislocation, stress and strains fields are determined and then, the limiting length of damage zone is drawn. The results are compared with those found for the opening mode I.