Fracture tests of low alloy steels based on the J-integral have been performed on compact tension and three point-bend specimens to investigate the effect of specimen size on the tearing modulus. Also, tearing instability tests have been conducted to clarify the effects of specimen size, fracture toughness and cyclic load on the tearing instability characteristic. It has been shown that the specimen size has little effect on the tearing modulus up to ω⇌2, but it has a notable effect on the critical value of the J-integral at the instability point (JInst). For very tough material, JInst depends on the testing compliance, but for not so tough material, it has little effect on JInst. The value of JInst under cyclic loading is found to be consistent with JInst under the monotonic load condition.
|ジャーナル||Transactions of the Japan Society of Mechanical Engineers Series A|
|出版ステータス||Published - 1986|
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