Paper number 909
|APPLICATION OF A DAMAGE MODEL FOR HIGH RATE DEFORMATION OF COMPOSITE STRUCTURES|
H. Eskandari and J. A. Nemes
Department of Mechanical Engineering, McGill University
817 Sherbrooke St. West, Montreal, Quebec, H3A 2K6, Canada
|Summary||After implementing the model into ABAQUS/Explicit software, a plate with a hole is analyzed. First, mesh objectivity of the model in the context of finite element analysis is addressed, and it is shown, by analyzing four different mesh refinements, that the model is objective with respect to the mesh size. Then the model is employed to predict the failure load of a plate with a hole of various diameters. Two different techniques are investigated for failure load prediction namely: mesh and stress limiter. Mesh limiter is based on using a specific mesh size. The stress limiter is based on limiting the minimum stress after damage. Both techniques rely on a known failure load of a particular geometry to evaluate the limits. The failure loads predicted using both techniques conform reasonably well to those predicted by Whitney and Nuismer's model and experiment.
||Keywords|| continuum damage, mesh sensitivity, high-rate deformation, graphite epoxy, rate dependence, isotropic damage tensor.
Theme : Composite Structures ; Simulation
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