アルミナ粒子分散ガラス基複合材料におけるき裂の偏向,湾曲による高靭化の数値シミュレーション

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rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: isVersionOf: http://ci.nii.ac.jp/naid/110002291289/A numerical simulation of crack bowing and deflection was performed on glass matrix alumrnina particulate composite to evaluate the effects on these toughening mechanisms of composite and was compared with the experimental data of previous works by the authors. The numerical simulation revealed that a crack deflection was predominant in the fracture process of glass matrix alumina particulate composite and that the crack bowing hardly emerged. If it is assumed that the crack extended into all alumina particle, the crack bowing emerges. With an increase in the difference of the fracture toughness between the particles and the matrix, the toughening by crack bowing becomes more effective and is more effective than that by crack deflection. Under the assumption that the interfacial precipitation promotes the crack bowing, the results of the numerical simulation were in agreement with experimental data of the present authors.
社団法人日本セラミックス協会の論文
1995-12-01