A generalized thermodynamically consistent distortional hardening model for Mg alloys

作者: Baodong Shi , Yan Peng , Fusheng Pan

DOI: 10.1016/J.IJPLAS.2015.06.010

关键词:

摘要: Abstract In the current work, a generalized distortional hardening model is developed by assuming each part of dissipation non-negative. More precisely, quadratic forms are assumed for and thermodynamical consistency fulfilled naturally. order to balance contributions isotropic into dissipation, weighting coefficient w introduced in contrast work Feigenbaum Dafalias (2007). It found that saturation directions governed this , which related with deformation modes. particular, setting w = 2, recover one based on convex plastic potential, cf. Shi Mosler (2013), thus Armstrong–Frederick type law obtained. The predictive ability verified comparison experimental observations three cases: stress-strain behaviours along different directions, biaxial tensile test compression test. evolution normalized yield surfaces cases briefly discussed.

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