Abstract
A commercially available finite-element package (ABAQUS) has been used to analyse the forming of a circular plate subjected to simultaneous stretching and bending processes. The method is used to study the plate response under both static and dynamic loading conditions, retaining the non-linearities involved in the large changes in geometry, the continuous change in contact surface conditions and the isotropic material work-hardening characteristics. An axisymmetric model is studied and discussed in detail. For the dynamic case, the plate is assumed to be deformed by the impact of a cylindrical projectile. In the dynamic analysis response the material strain-rate dependence via the Cowper-Symonds power law is included in the analysis. An algorithm to deal with the contact between the cylindrical projectile and plate has been developed by means of the penalty approach. The interaction of the sliding surfaces is modelled with a modified Coulomb friction law. A qualitative comparison betwee the computed results and experiments is referred to in the text.
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