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Analysis of Densification and Swelling of Solids Using Pressure Dependent Plasticity Criteria

J. Larsson1, J. Faleskog1, A.R. Massih2,3

Royal Institute of Technology, SE-100 44 Stockholm, Sweden
Malmö University, SE-205 06 Malmö, Sweden
Quantum Technologies AB, SE-751 83 Uppsala, Sweden

Computer Modeling in Engineering & Sciences 2004, 5(1), 73-80.


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 and yield criteria, where the stress response of material under compressive loads is evaluated. Finally the method is applied to the case of B$_4$C powder encased in a stainless steel tube, which is subjected to compressive loads under swelling condition.


Cite This Article

Larsson, J., Faleskog, J., Massih, A. (2004). Analysis of Densification and Swelling of Solids Using Pressure Dependent Plasticity Criteria. CMES-Computer Modeling in Engineering & Sciences, 5(1), 73–80.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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