The aim of this paper is to elaborate on two recent constitutive theories for anisotropic plastic flow: one based on microscopic considerations and another based on phenomenological thermodynamics. The merits and shortcomings of each one of these two different approaches can be deduced from the brief overviews provided and their complementarity may be judged. More work is thus required to develop a consistent and convenient framework where microscopic and phenomenlogical arguments can optimally be used to interpret anisotropic plastic flow.
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