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Predictions of plastic stress-strain relations of polycrystals based on the Lin model
Affiliation:1. Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan 523808, China;2. Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
Abstract:A uniaxial stress-strain curve is calculated for a polycrystal consisting of numerous nonhardening FCC crystals based on the Lin model. The coefficient matrix relating the deviation of plastic strain to the one of stress in the Lin model turned out to be singular. The simplex method is used to determine slips of all slip systems in constituent crystals. The calculated curves lie between the KBW model and the Hill model.
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