Abstract
The mesomechanics behavior of a polycrystalline microstructure subjected to creep and constant strain rate loadings is investigated. The analysis is based on a Voronoi polygonization strategy for the generation of grains, that are bonded to each other via interfaces along the grain boundaries. A new constitutive model is proposed for the rate-dependent debonding along these interfaces, whereby damage is kinetically coupled to viscoplastic slip and dilatation. The paper may be viewed as generalizing the rate-independent model used in Cannmo et al. (1995).
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Cannmo, P., Mähler, L. & Runesson, K. Modelling of interfacial viscoplastic slip coupled to damage in a polycrystalline microstructure. Computational Mechanics 20, 12–19 (1997). https://doi.org/10.1007/s004660050210
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DOI: https://doi.org/10.1007/s004660050210