An Elastic and Elasto-Plastic Mixed Analysis Using Overlaying Mesh Method.
An Elastic and Elasto-Plastic Mixed Analysis Using Overlaying Mesh Method.
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使用叠加网格法的弹性和弹塑性混合分析。
DOI：
10.1299/kikaia.68.603
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Ohtsubo
中科院分区：
文献类型：
--
作者：
S. Nakasumi;Katsuyuki Suzuki;D. Fujii;H. Ohtsubo
本文提出了弹塑性分析的有效方法。在叠加网格方法中，局部模型叠加在全局模型上，前者代表高分辨率的变形，后者代表粗糙的变形。然而，当使用该方法分析材料混合模型时，全局模型和局部模型之间相同部分的弹性常数必须相同。这使得建模非常不方便。在本文中，我们阐明了全局模型和局部模型之间使用不同弹性常数的情况下的行为。在这种情况下，忽略全局模型的弹性常数，并适应局部模型的弹性常数。利用该理论，全局模型和局部模型的网格不仅可以在几何形状上独立，而且在材料常数上也可以独立构建。此外，该理论还应用于弹塑性分析。该方法中，全局模型采用线性分析，局部模型采用非线性分析。我们可以通过使用这种方法来降低计算成本。
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.