アルミナ粒子分散エポキシ樹脂の破壊力学的特性の評価

概要

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The plane strain fracture toughness, K_<Ic>, the fracture resistance, K_R, and the crack growth characteristics of stress corrosion c racking and fatigue were investigated for an alumina particulate filled epoxide composite. Based on the results, basic fracture characteristics were evaluated. The results obtained are summarized as follows: (1) The resistance to the stable crack growth as well as the fracture initiation is described as K=K_<Ic>. (2) Below K_<Ic>, stress corrosion cracking occurs. The threshold stress intensity, K_<Iscc>, is 0.89 K_<Ic>. (3) The threshold stress intensity for fatigue crack growth is smaller than K_<Iscc>. A marked influence of the stress ratio on the fatigue crack growth rates is observed. On the other hand, there is no effect of cyclic frequency. It is judged that interaction with stress corrosion cracking is not so significant.
一般社団法人日本機械学会の論文
1988-03-25