Evaluation of Ductile Fracture of Structural Steels by Microvoid Model
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概要
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In the present work, the ductile fracture of structural steels and the effect of plastic pre-strain on ductility have been investigated by tensile test. The fracture process consisting of void nucleation, growth and coalescence was observed by scanning electron microscopy (SEM). The nucleation strain of microvoid was measured experimentally. The critical interfacial strength of particle/matrix interface was calculated by dislocation model and continuum analysis, and the void growth was evaluated by Rice-Tracey model. It was found that longitudinal void coalescence does not affect fracture even though large cracks exist, but particle position affects void nucleation. Thomasons plastic limit-load model was used to predict void growth strain. Through the analysis of ductile fracture process, the influence of plastic pre-strain on ductility was discussed.
- 社団法人 日本鉄鋼協会の論文
- 1999-04-15
著者
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KISHI Teruo
Research Center for Advanced Science and Technology, The University of Tokyo
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QIU Hai
Steel Research Center, National Institute for Materials Science
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ENOKI Manabu
Research Center for Advanced Science and Technology, The University of Tokyo
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Qiu H
Research Center For Advanced Science And Technology The University Of Tokyo
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Qiu H
Steel Research Center National Institute For Materials Science
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Kishi T
National Inst. Advanced Interdisciplinary Res. Tsukuba Jpn
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Enoki Manabu
Research Center For Advanced Science And Technology The University Of Tokyo
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Mori Hisashi
Research Center For Advanced Science And Technology The University Of Tokyo
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QIU Hai
Research Center for Advanced Science and Technology, The University of Tokyo
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Kishi Teruo
Research Center For Advanced Science And Technology The University Of Tokyo
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