Effect of a Microdefect ahead of a Main Crack on Strength of Solids : Exact Solution to the Main Crack-Microdefect Interaction Model

• NAKAMURA Teruo

• SAITO Kenji

• ARAKI Shigetoshi

抄録

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.

収録刊行物

• JSME international journal. Ser. A, Mechanics and material engineering

  JSME international journal. Ser. A, Mechanics and material engineering 39 (2), 231-236, 1996-04-15

  一般社団法人 日本機械学会

キーワード

• Main Crack
• Microdefect
• Crack Shielding
• Stress Intensity Factor
• Fracture
• Fracture Strength
• Fracture Toughness
• Ceramics

詳細情報

• CRID: 1390282680409732480
• NII論文ID: 110002964456
• NII書誌ID: AA10888746
• DOI: 10.1299/jsmea1993.39.2_231
• ISSN: 13408046
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1993/39/2/39_2_231/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可