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Finite element analysis was performed to investigate the shear stress distribution in double notched isotrop ic and orthotropic specimens under compressive loading. The shear stress distribution between the notches in the orthotropic material was found to be relatively uniform except at the notch roots where a distinct stress concentration was predicted at both for the isotropic and the orthotropic materials . In brittle or thotropic materials, microcracks initiate in the adjacent regions todoi:10.2109/jcersj.104.978 fatcat:uyaj4ncwyrgkhebvajr7qgpyta