複合階層塑性変形モデルの新たな展開

概要

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The multiple strata plasticity model, which was presented in the previous paper by introducing the tensor Q expressing the activating state of slip systems in the polycrystalline metal, has been developed with a new internal state factor B_5. This factor B_5 denotes the ratio of the grains having the activating slip systems greater than five to the total grains. The variation features of B_5 and Q can be computationally evaluated with a virtual polycrystalline specimen. The microstructure state such as dislocation density and so on can be reflected in the internal structure variablle A in this model. The relation between B_5 and A has been examined on the tensile flow curve of pure copper. As a result, a simple formula connecting the A with B_5 was found. Moreover, it has been clarified that this formula is applicable for describing the plastic deformations under another proportional loadings.
一般社団法人日本機械学会の論文
1999-06-25