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

页码：197 / 210

页数：14

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