Measurement of energy release rate and energy flux of rapidly bifurcating crack in Homalite 100 and Araldite B by high-speed holographic microscopy

Shinichi Suzuki, Kenichi Sakaue, Kazuya Iwanaga

研究成果: Article査読

18 被引用数 (Scopus)

抄録

High-speed holographic microscopy is applied to take three successive photographs of fast propagating cracks in Homalite 100 or in Araldite B at the moment of bifurcation. Crack speed at bifurcation is about 540 m/s on Homalite 100, and about 450 m/s on Araldite B. From the photographs, crack speeds immediately before and after bifurcation are obtained, and it is found that discontinuous change of crack speed does not exist at the moment of bifurcation in the case of Homalite 100, but exists in the case of Araldite B. From the photographs, crack opening displacement (COD) is also measured along the cracks as a function of distance r from the crack tips. The measurement results show that the CODs are proportional to √r before bifurcation. After bifurcation, the CODs of mother cracks are proportional to √r, though the CODs of branch cracks are not always proportional to √r. The energy release rate is obtained from the measured CODs, and it is found that energy release rate is continuous at bifurcation point in both cases of Homalite 100 and Araldite B. Energy flux that shows the energy flow toward a crack tip is also obtained.

本文言語English
ページ(範囲)1487-1512
ページ数26
ジャーナルJournal of the Mechanics and Physics of Solids
55
7
DOI
出版ステータスPublished - 2007 7
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 機械工学

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