Creep-fatigue life prediction under fully-reversed multiaxial loading at high temperatures

被引:43
作者
Shang, De-Guang [1 ]
Sun, Guo-Qin [1 ]
Yan, Chu-Liang [1 ]
Chen, Jian-Hua [1 ]
Cai, Neng [1 ]
机构
[1] Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100022, Peoples R China
基金
中国国家自然科学基金;
关键词
multiaxial fatigue; high temperature; fatigue damage; creep damage; low-cycle fatigue; COMBINED TENSION-TORSION; TIME-DEPENDENT DAMAGE; 2-1/4CR1MO STEEL; STRESS; MODEL; 600-DEGREES-C; STATE;
D O I
10.1016/j.ijfatigue.2006.06.010
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
A multiaxial fatigue damage parameter based on the critical plane approach was proposed to calculate the pure fatigue damage under Uniaxial/multiaxial loading at constant high temperatures. For the fully-reversed low-cycle fatigue loading under low frequency at high temperature, one-half of the maximum equivalent stress response value at cyclic stabilization is used as the creep stress to evaluate the multiaxial creep damage. The linear damage accumulation rule is used to predict the inultiaxial creep-fatigue life at high temperature. The creep-fatigue experimental data of thin tubular specimens with GH4169 superalloy and 2.25Ci-IMo steel were used to verify the proposed creep-fatigue life prediction model. The results showed that the proposed creep-fatigue damage calculation model can be used under either uniaxial or multiaxial nonproportional loading at high temperature. The proposed model is used to predict inultiaxial creepfatigue life, and a good agreement is demonstrated with experimental data. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:705 / 712
页数:8
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