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arXiv · 1710.05566

Thermodynamic dislocation theory of adiabatic shear banding in steel

Khanh Chau Le·Tuan Minh Tran·James S. Langer
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Abstract

The statistical-thermodynamic dislocation theory developed in our earlier studies is used here in an analysis of the experimental observations of adiabatic shear banding in steel by Marchand and Duffy (1988). Employing a small set of physics-based parameters, which we expect to be approximately independent of strain rate and temperature, we are able to explain experimental stress-strain curves at six different temperatures and four different strain rates. We make a simple model of a weak notch-like disturbance that, when driven hard enough, triggers shear banding instabilities that are quantitatively comparable with those seen in the experiments.

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Khanh Chau Le, Tuan Minh Tran, James S. Langer. 2017-10-16. Thermodynamic dislocation theory of adiabatic shear banding in steel. https://arxiv.org/abs/1710.05566

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