Micro-structural motivated phenomenological modelling of metal foams: experiments and modelling
作者： Anne Jung , Thilo Grammes , Stefan Diebels
DOI: 10.1007/S00419-014-0942-Y
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摘要: Cellular materials like metal foams are bio-inspired which exhibit great potential for application in lightweight construction or as kinetic energy absorber. Such cellular show a complex micro-structure significantly affects the macroscopic global properties. localised deformation expressed bands under inelastic strain conditions. Engineering with requires material models describe behaviour properly even different load cases. In this work, new modelling approach has been developed phenomenologically accounts micro-structural effects by representative volume element made of several springs. The model is experimentally validated, and its motivated parameters identified quasi-static compression tests unloading cycles. Using digital image correlation, it was possible to connect stress–strain behaviour, evaluated locally front surface specimens.
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