engleski

Multiscale Modeling of Metal Foams using the XFEM

Irregular open cell cellular structures such as metal foams play an important role in lightweight structures and shock absorption components. They are tested experimentally in quasi-static and dynamic compression tests, and they are modeled numerically with finite elements and geometrical information from CT scans. Filler material within the metal foams enhances the energy dissipation properties which are important for shock absorbers. For comparison reasons the same geometrical structure of the foam needs to be modeled with and without filler material. One way to do that is the application of level sets and the XFEM to account for the jump in the strain field within an element. Since only small parts of the foam structure can be modeled, a representative volume element of the structure is used for the calculations. A comparison of the experiments as well as the numerical results of the model with and without filler material is shown.

metal foam, multiscale, XFEM

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