SA-12-4(077) Viscoplasticity Model using Framework of Crystal Plasticity and Its Application of High Temperature Structural Analysis(Inelastic Modeling & Analysis 2)
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概要
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The present paper presents a constitutive model for continuum media by using the framework of crystal plasticity developed by Hutchinson. The feature of the present model utilizes kinematic hardening term to be applicable for cyclic loading problems. The viscosity is assumed to occur in proportion to the ratio of effective stress to drug stress to a power. The model includes a classical model of Norton or time-independent plasticty model by setting the parameters as a special case. The capability of the proposed model is investigated by simulating stress-strain curve and creep strain curve for SUS 304 stainless steel at elevated temperature. Considering that numbers of material constants in the present model is a few, the model can predict material behaviors well. The model is incorporated in the three dimensional finite element method to study the cyclic loading problem for the perforated plate, where the tangent modules method is employed. The feature of structural analysis is studied by changing the employed constitutive model.
- 一般社団法人日本機械学会の論文
- 2001-06-03
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