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Metal foams as a new class of materials with interesting properties such as high stiffness and strength to density ratios, capacity to absorb impact energy, and reproducibility, are rapidly growing their share in engineering applications such as aerospace, automotive industry, lightweight structures, and energy absorbers. Different numerical approaches have been already developed for the simulation of this class of materials from which the two-scale microplane model has been focused in this research. First a simple algorithm has been proposed for the numerical implementation of microplane model to simulate the mechanical behavior of closed-cell metal foams. The structure of foam is assumed to be an assembly of firmly bonded spherical shells. Next, in order to calibrate the microplane model, the mesostructure of foam has been simulated using non-linear finite element model. The FE model has been subjected to both uniaxial and hydrostatical loads and required steps for the extraction of model parameters from the results have been outlined. Finally, the results of microplane model and mesomodel have been compared for a more general biaxial loading condition. Despite tremendous reduction of computational cost, good agreement has been achieved.

Keywords: Closed-Cell Metal Foams, Microplane Model, Non-Linear Finite Element, Numerical Implementation, Mesostructure

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