Abstract

The anisotropic hyperelastic model (MAT_249) and Non-Orthogonal Model (MAT_293) are the material models developed recently to simulate the forming process of dry fabric and fabric-reinforced thermoplastic prepregs. In this study, the prediction capabilities of these two models in terms of shear angle distribution and boundary profile of the deformed fabric are compared over a hemispherical forming simulation of a plain weave E-glass fabric reinforcement. According to the results, in the simulation performed with MAT_293, it is seen that excessive distortions occur in the meshes at the advanced stages of the deformation in the fabric. In addition, after a certain punch stroke, the shear angle distribution obtained with MAT_293 starts to deviate rapidly from realistic results. MAT_249 produces consistent results even in large deformations.

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