重合メッシュ法を用いた弾性・弾塑性混合解析

概要

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In this paper, the effective method for an elasto-plastic analysis is presented. In the overlaying mesh method, a local model is overlaid on a global model, the former represents high resolution of deformation and the latter represents rough deformation. However, when material-mixed model is analyzed using this method, the elastic constant must be the same at identical part between global model and local model. This makes modeling very inconvenient. In this paper, we clarify the behavior in the case of different elastic constant is used between global model and local model. In this case, the elastic constant of global model is ignored, and that of local model is adapted. By this theory, mesh of global model and that of local model can be made independently not only in geometric shape but also in material constant. And furthermore, this theory is applied to an elastoplastic analysis. In this method, global model is analyzed by liner analysis, and local model by nonliner analysis. We can reduce calculation cost by using this method.