Effect of crack-closure by shrinkage of embedded shape memory tini fiber SMA-FEC under mixed mode loading

Akira Shimamoto, Jeonghwan Nam, Takeshi Azakami, Yasubumi Furuya

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Shape memory TiNi fiber reinforced/epoxy matrix composite (SMA-FEC) is fabricated to demonstrate the suppression effect of crack-tip stress concentration and the fracture toughness (K value) under mixed mode stresses in the composite. The test specimens have the two types of angled notches to the transverse direction of the tensile-type specimen, i. e. θ=0°, 15°, 30°, 45°, 60° with several crack lengths. The stress intensity factor at the notch tip is experimentally determined by photoelastic fringes. The decreases of K-value are attributed to the compressive stress field in the matrix which is induced when the pre-strain value of TiNi fiber (T>At). The dependencies of K value on the pre-strain value of TiNi fibers as well as on the compressive domain size between a crack-tip and are discussed.

本文言語English
ページ(範囲)288-293
ページ数6
ジャーナルNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
67
654
DOI
出版ステータスPublished - 2001
外部発表はい

ASJC Scopus subject areas

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

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