Microcanonical Entropy and Mesoscale Dislocation Mechanics and Plasticity |
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Authors: | Amit Acharya |
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Institution: | 1. Carnegie Mellon University, Pittsburgh, PA, USA
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Abstract: | A methodology is devised to utilize the statistical mechanical entropy of an isolated, constrained atomistic system to define constitutive response functions for the dissipative driving-force and energetic fields in continuum thermomechanics. A thermodynamic model of dislocation mechanics is discussed as an example. Primary outcomes are constitutive relations for the back-stress tensor and the Cauchy stress tensor in terms of the elastic distortion, mass density, polar dislocation density, and the scalar statistical density. |
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