著者

西岡 俊久 小林 豊 Epstein S. J.

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.59, no.561, pp.1319-1326, 1993-05-25

被引用文献数

2

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Finite element simulation was carried out for inhomogeneous elastic-plastic fracture specimens, which consist of A533B steel and HT80 steel. These two materials have considerably different yield stresses, although their elastic properties are exactly the same. The nonlinear fracture parameter, T^* integral, was extended for inhomogeneous multilayer materials. The T^* integral for inhomogeneous materials demonstrates excellent path independence, even in the stages of large plastic deformations around the crack tip and the material interface. Numerically generated moire fringe patterns are in good agreement with experimentally recorded patterns. The shapes of plastic zones appearing in the specimens reveal large inhomogeneity effects.

著者

西岡 俊久 西 正己 藤本 岳洋 坂倉 慧悟 Epstein S. Jonathan

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.59, no.559, pp.558-565, 1993-03-25

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In order to investigate inhomogeneity effects in elastic-plastic fracture, A533B steel and HT80 steel, which have considerably different yield stresses, were chosen. The moire interferometry was used for direct measurements of the crack-tip behavior in the homogeneous CT specimens of A533B and HT80, and in electron-beam-welded inhomogeneous CT specimens of these two materials. Two-dimensional moire gratings with relatively low frequency of 300 lines/mm were used to follow large plastic deformations. The near-tip deformations were compared with the corresponding HRR singular fields. Large inhomogeneity effects were observed in the moire fringe patterns as plastic deformations proceed.

著者

西岡 俊久 野村 亮 藤本 岳洋 EPSTEIN J.S.

出版者

一般社団法人日本機械学会

雑誌

材料力学部門講演会講演論文集

巻号頁・発行日

vol.2000, pp.285-286, 2000-10-05