著者

中曽根 祐司 松尾 唯史

出版者

一般社団法人日本機械学会

雑誌

計算力学講演会講演論文集 (ISSN:1348026X)

巻号頁・発行日

vol.2005, no.18, pp.275-276, 2005-11-17

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The present study has applied Hori and Kameda's stress inversion method to the estimation of elasto-plastic stress distributions in Al-Mg polycrystalline materials. The method can estimate 2D elasto-plastic stress distributions from deformation distributions measured in a structure by using only the elastic moduli of the material of the structure. First, computer codes have been developed based on the present stress inversion method. Then, elasto-plastic 2D FEM analyses of stress concentration problems caused by elliptic holes and rectangular inclusions were made. Comparison of the results obtained by the FEM analyses and the stress inversion method showed that the stress inversion method can estimate elastic and elasto-plastic stress distributions from deformation/strain distributions with reasonable accuracy. Finally, the elasto-plastic stress distributions in Al-Mg were estimated by using deformation distributions measured by the digital image correlation method and it was found that stress concentration occurred near triple junctions of grain boundaries.