Effect of a Microdefect ahead of a Main Crack on Strength of Solids : Exact Solution to the Main Crack-Microdefect Interaction Model
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概要
- 論文の詳細を見る
In our previous paper, an approximate solution to the main crack-microdefect interaction model was derived using a main crack stress field, and the effect of a microdefect ahead of a main crack on the strength of solids was discussed in terms of the model. In the present paper, in order to investigate more precisely the above effect, the main crack-microdefect interaction model is formulated more specifically based on the method of continuously distributed theory of dislocations, and the distribution functions for both a main crack and a microdefect are obtained. As a result, we obtain stress intensity factors K both at the tip of a main crack and a microdefect in the closed form. Using these K values, we elucidate the effective range of the above model and the crack shielding effect by a microdefect. Furthermore, the crack length dependence of the fracture strength and fracture toughness of engineering ceramics can be explained well theoretically using the present model.
- 一般社団法人日本機械学会の論文
- 1996-04-15
著者
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Saito Kenji
Department Of Applied Chemistry Faculty Of Science Tokyo University Of Science
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Araki Shigetoshi
Department Of Mechanical And System Engineering Kyoto Institute Of Technology
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Araki Shigetoshi
Department Of Mechanical & System Engineering Kyoto Institute Of Technology
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NAKAMURA Teruo
Research and Development Department, TCM Toyo Umpanki Co., Ltd
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Nakamura Teruo
Research And Development Department Tcm Toyo Umpanki Co. Ltd
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Saito Kenji
Department Of Mechanical And System Engineering Kyoto Institute Of Technology
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SAITO Kenji
Department of Applied Biological Chemistry Graduate School of Agricultural and Life Sciences, The University of Tokyo
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