A multiaxial creep-damage model for creep crack growth considering cavity growth and microcrack interaction

被引：118
作者：
Wen, Jian-Feng [1 ]
Tu, Shan-Tung [1 ]
机构：
[1] E China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2014年 / 123卷
基金：
中国国家自然科学基金;
关键词：
Creep damage; Crack growth; Cavity growth; Multiaxial fracture; Finite element analysis; CONSTITUTIVE-EQUATIONS; DIFFUSIVE CAVITATION; FAILURE SIMULATIONS; CONTINUUM DAMAGE; STRESS; BEHAVIOR; 316H; MECHANISMS; PREDICTION; DUCTILITY;
D O I：
10.1016/j.engfracmech.2014.03.001
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
This article presents a concise multiaxial creep-damage model for creep crack growth considering the cavity growth and microcrack interaction. Special emphasis is put on developing and validating the multiaxial creep ductility factor (MCDF) based on power-law creep controlled cavity growth theory. Good agreements with the theoretical and experimental data prove the effectiveness of the proposed MCDF. The application of the proposed creep-damage model through finite element simulation of the creep deformation and crack growth in C-Shaped Tension and Compact Tension specimens of 316H tested at 550 degrees C confirms the predictive capability of the proposed model. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：197 / 210
页数：14
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