Abstract
In this paper, the tearing behavior was studied for double-edge notched tensile specimen configurations and a corner loaded square thin sheet configuration with a center cut. Geometrically nonlinear shell element post-buckling analysis was performed accounting for wrinkle deformation. The cut extension was considered by cohesive zone modeling. A shell element compatible cohesive element was developed and inserted to ABAQUS as a user subroutine to predict the cut propagation. The material nonlinearity was also considered. Results indicated that the wrinkle formation significantly altered the load transfer. This intensified the stress concentration at the cut tip and resulted in much earlier cut extension.
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