Plastic Deformation: Constitutive Description

A comprehensive study on constitutive equations describing the temperature and strain-rate dependent stress–strain behavior of mechanically loaded materials is given. Subsequent to a review of empirical, semi-empirical, and physically-based constitutive models, attention is devoted to the theory of thermally activated flow. An overview of work-hardening mechanisms in bcc and fcc polycrystalline solids as well as an approach to describing strain-rate and temperature dependent material behavior based on the theory of thermally activated flow are given. Furthermore, the effects of extremely high strain rates on flow stresses are shown and subsequently discussed.

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