BEM Analysis of a Cylindrical Three Point Bend Specimen with a Chevron Crack for Fracture Toughness Test of Rock

Kazuo Hayashi, Akihiko Ono, Hiroyuki AbÉ

研究成果: Article査読

4 被引用数 (Scopus)

抄録

The stress intensity factor along the periphery of a chevron crack in a cylindrical three point bend specimen (CB) is evaluated by BEM for the establishment of the rock fracture toughness test using CB specimens. So far, in the test, the stress intensity factor is assumed to be constant along the front edge of the crack and is evaluated by the compliance method. It is revealed from the present analysis that the stress intensity factor takes a minimum value at the center of the front edge so that the crack growth during the fracture toughness test makes the front edge of the crack concave. It is also shown that the stress intensity factor evaluated by the compliance method is larger than that of the concave crack with a homogeneous distribution of the stress intensity factor along the front edge. This implies that the fracture toughness test leads to over estimation.

本文言語English
ページ(範囲)1541-1545
ページ数5
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series A
54
504
DOI
出版ステータスPublished - 1988

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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