完全脆性材料の遅れ破壊に及ぼす初期亀裂の大きさと試験片寸法の影響

概要

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In order to clarify the effect of the initial crack length α_0 and specimen size on the time to failure(T_f)as well as to find the most suitable condition for evaluating the minimum value of the stress intensity factor K_0(the threshold, the slow crack growth limit), the characteristics of static fatigue tests of brittle materials were analytically discussed and the analyzed results were verified by the tests on a soda lime glass. Both by analytical and experimental works, it was clarified that the T_f for a given value of K_<Ii>becomes shorter as α_0 decreases(K_<Ii> : the initial stress intensity). This fact indicates that to use the specimens with a smaller crack is very advantageous to characterize K_<Ii>-T_f relations as well as the K_0 value in a shorter time.
社団法人日本セラミックス協会の論文
1998-01-01