室温における316FR鋼の単軸ラチェット特性 : 第2報, 構成式によるシミュレーション

概要

論文の詳細を見る
Uniaxial ratchetting experiments discussed in the 1st report are simulated using a new extension of the kinematic hardening model based on the critical state of dynamic recovery. The extension is formulated on the assumption that the dynamic recovery of back stress, which is decomposed into parts, is activated to some extent in proportion to the magnitude of each part before reaching the critical state. The extension is simple and featured by the capability of representing steady-state ratchetting. The two versions of the model considered previously are also applied to the experiments. It is shown that the extension is effective for simulating the experiments, in which accumulation of strain under uniaxial cyclic loading takes place due to slight opening of stress-strain hysteresis loops as well as viscoplasticity. It is also shown that the effect of viscoplasticity on the accumulation of strain becomes saturated in an early stage of cyclic loading when stress ratio is negative.
一般社団法人日本機械学会の論文
1998-12-25