Deformation and Failure of Amorphous Solidlike Materials

Details Deformation and Failure of Amorphous Solidlike Materials Deformation and Failure of Amorphous Solidlike Materials

2010-04-27

arxiv.org/abs/1004.4684v2

Physics

Condensed Matter

Statistical Mechanics

28 pages, 4 figures, submitted to Annual Reviews of Condensed Matter Physics

Scientific paper

Since the 1970's, theories of deformation and failure of amorphous, solidlike materials have started with models in which stress-driven, molecular rearrangements occur at localized flow defects via "shear transformations". This picture is the basis for the modern theory of "shear transformation zones" (STZ's), which is the focus of this review. We begin by describing the structure of the theory in general terms and by showing several applications, specifically: interpretation of stress-strain measurements for a bulk metallic glass, analysis of numerical simulations of shear banding, and the use of the STZ equations of motion in free-boundary calculations. In the second half of this article, we focus for simplicity on what we call an "athermal" model of amorphous plasticity, and use that model to illustrate how the STZ theory emerges within a systematic formulation of nonequilibrium thermodynamics.

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