多結晶金属の塑性挙動に対する微視不均一の影響

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概要

The relation between the macroscopic plastic response and the corresponding grain scale plastic events for a polycrystalline aggregate was studied by using the finite element method. The numerical model used was based on the constitutive relation combining a few simple and fundamental semi microscopic plastic mechanisms which can describe a large variety of plastic behaviors observed in lots of experments. The numerically evaluated plastic accommodation parameter, or the principle and representative scalar function, which relates the microscopic mechanisms on the grain scale with the macroscopic behavior, was compared with those suggested by other theories accepted in polycrystalline plasticity.

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