室温における316FR鋼の単軸ラチェット特性 : 第1報, 実験的検討

概要

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Uniaxial ratchetting characteristics of 316 FR steel at room temperature are studied experimentally. "Strain-controlled ratchetting" tests, in which maximum strain increases every cycle by prescribed amounts of strain, are done systematically in addition to conventional monotonic, cyclic, and ratchetting tests. Thus hysteresis loop closure, cyclic hardening and viscoplasticity are discussed in the context of constitutive modeling for ratchetting. The strain-controlled ratchetting tests reveal that very slight opening of hysteresis loops occurs, and that neither accumulated inelastic strain nor maximum inelastic strain induces significant isotropic hardening when strain range is relatively small. These findings allow us to conclude that uniaxial ratchetting of the material at room temperature can be brought about by slight opening of hysteresis loops as well as viscoplasticity without noticeable influence of isotropic hardening.
社団法人日本機械学会の論文
1998-11-25