New three-dimensional plastic potentials for porous solids with a von Mises matrix - 03/02/15
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Abstract |
In this paper, new 3-D plastic potentials for a porous solid with a von Mises matrix are obtained. First, a strain rate based potential is derived, the noteworthy result being its centro-symmetry. Moreover, it is revealed that the couplings between invariants are very specific, the most important influence of the third invariant being for axisymmetric states. It is demonstrated that the exact stress-based potential of the porous material should have the same key properties. Furthermore, it is deduced a new analytic 3-D stress-based potential that satisfies these properties. Compared to the existing criteria for porous solids with a von Mises matrix, this model is the only one that captures the specific couplings between all stress invariants and is exact for axisymmetric states.
Le texte complet de cet article est disponible en PDF.Keywords : Three-dimensional strain rate potentials, Three-dimensional stress-based potentials, Porous Mises solid, Coupled effects of stress invariants
Plan
Vol 343 - N° 2
P. 77-94 - février 2015 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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