微視的特性を考慮した粒子分散複合材の弾塑性構成則モデル

概要

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The prior theories about elastoplastic constitutive law for particle dispersed composite develop the relation between the average stress and the average strain in multiple phases. In our study, it is found that the local stress distribution in the mesoscale has a great effect on the global property of a composite that undergoes the plastic deformation. The present model considers the distributed stress in standard distribution function in each phase of the composite, where the distribution span is segmented. The macro-stress is linked with the distributed meso-stress by means of the proposed self-consistent compliance mixing law. On the other hand, a meso-mechanics analysis by FEM was conducted to investigate the interaction phenomena occurring in the composite. Also the result was used to provide a reference to the present constitutive model developed in this paper. The developed constitutive model shows an excellent correlation with the reference, thus demonstrates the effectiveness of the present model in both the elastic stage and the plastic stage.
一般社団法人日本機械学会の論文
1998-04-26