4006 多段レオロジーモデルに基づくクリープ疲労変形表示式について(S25-2 疲労・クリープ疲労,S25 材料・構造の非弾性挙動・高温強度・損傷評価)

抄録

The present paper investigates the applicability of the multistage spring, slider and dashpot rheological model to description of creep-fatigue deformation behavior of materials, where it is assumed that the frictional stress of each slider element is dependent on the applied strain rate and is related with other model parameters. The equations to describe the stress versus strain relationships of materials subjected to creep-fatigue loadings, such as so-called PC or CP straining, were derived based on this model. The creep-fatigue deformation behaviors of 316LC steel at 1023K were estimated by using these equations, where the model parameters determined for 316LC steel by GA analysis in the previous report were used.