J. Larsson1, J. Faleskog1, A.R. Massih2,3
CMES-Computer Modeling in Engineering & Sciences, Vol.5, No.1, pp. 73-80, 2004, DOI:10.3970/cmes.2004.005.073
Abstract We consider certain constitutive laws for analyzing the elastic-plastic behavior of granular material, which is subjected to compressive hydrostatic stresses and concomitantly undergoing swelling. The plastic yield functions for this kind of materials are pressure and porosity dependent. The constitutive laws are formulated in a finite element (FE) framework for applications to structures involving granular/porous materials. We have employed an implicit and unconditionally stable algorithm for numerical integration of the constitutive relations. The numerical method has been programmed in a FE computer code. The code is then used to study a plane strain problem for a range of model parameters… More >
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