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Modeling of Composite With Meso-Localized Damage Accounting for Local Stress Distribution


 The existing constitutive models of composite were usually built on the relation between the phase-average stress and strain, as treated in monolithic materials. In the present work, however, it was found that the averaged characteristic of the phase material, in which the plastic damage occurs, is quite different from that of the monolithic material. And the morphology of the non-uniform local properties remarkably gives effects on the global property of the composite. In order to model the local phenomenon in composite, a statistical distribution function was proposed to describe the local stress and the local plasticity. Furthermore by applying Localized Rigidity Method (LRM), which was proposed by the authors, a mixture law to estimate the percentage of the local plastic damage regions is developed. A numerical calculation was performed to investigate the nonlinear phenomena of the composite with the meso-localized plasticity, and the high performance of the present model was verified.