1923 クリープ損傷を受けた鋼材の自己修復過程のモデリング(S19-2 構造材のクリープ・疲労・損傷解析,S19 材料の非弾性変形とそのモデル化)  [in Japanese] 1923 Modeling of Self-Repair Process of Steels Subjected to Creep Damage  [in Japanese]

The evolution equation of self-repairing is proposed based on the constrained growth model of the cavity by Dyson and continuum damage mechanics. The constitutive equation of creep by Suzuki and Hamanaka based on kinematic/isotropic hardening theory is extended to take into account the effect of damage. The constitutive modeling is identified, based on tensile creep test and sintering test by compressive loading after tensile creep for two steels, SBV2 and SUS316HTB. Consequently, the validity of the proposed modeling is illustrated through the simulations for the self-repair process of two kinds of steels damaged by creep.