Model adaptivity in the context of sheet metal forming

The use of new materials and complex part geometries poses significant challenges for modeling and finite element simulation of deep drawing processes. Due to the complexity and size of the models used, deep drawing simulation using solid continuum finite elements has proved to be too expensive in industrial engineering practice. However, small thickness to length ratio of sheet metal parts are typically computed using dimensionally reduced finite element formulations. Dimensional reduction and model assumptions provide noticeable simulation time and resource savings at the cost of solution quality. A method to obtain a realistic three-dimensional stress state without a complete nonlinear strictly three-dimensional forming analysis is being developed. The solution enhancement scheme has been efficiently applied to press force and elastic springback computations in industrial models involving up to 1.5 million degrees of freedom. The scheme is being developed and implemented as an add-on to commercial FE-Software.     «

The use of new materials and complex part geometries poses significant challenges for modeling and finite element simulation of deep drawing processes. Due to the complexity and size of the models used, deep drawing simulation using solid continuum finite elements has proved to be too expensive in industrial engineering practice. However, small thickness to length ratio of sheet metal parts are typically computed using dimensionally reduced finite element formulations. Dimensional reduction and...     »