Abstract
One presents a model for coalescence of cavities in porous ductile viscoplastic solids. The representative volume element considered is schematized as a ‘sandwich’ consisting of a central porous layer surrounded by two external sound layers, the stress and strain rate tensors being considered as homogeneous in each layer. The sound layers obey the classical Norton model and the porous one some specific homogenized model for porous viscoplastic solids accounting for void shape. An important feature is the description of the peculiar evolution of this shape during coalescence. The model predictions are successfully compared to the results of some finite element micromechanical simulations. To cite this article: L. Flandi, J.-B. Leblond, C. R. Mecanique 333 (2005).
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