低合金鋼の延性不安定破壊特性に及ぼす試験片寸法および繰返し荷重の影響

概要

論文の詳細を見る
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 (J_<inst>). For very tough material, J_<inst> depends on the testing compliance, but for not so tough material, it has little effect on J_<inst>. The value of J_<inst> under cyclic loading is found to be consistent with J_<inst> under the monotonic load condition.
一般社団法人日本機械学会の論文
1986-02-25