Analysis of Creep Crack Growth in Surface Cracked Specimens:Comparisons between Approaches of Fracture Mechanics and Continuum Damage Mechanics
The numerical approaches to simulate creep crack growth can be divided into two different categories. The first category is employing conventional fracture mechanics, in which the rate of crack growth is predicted by correlating it with a fracture mechanics parameter. The second category gaining much attention is on the basis of damage mechanics concept. In this paper, three dimensional analyses of creep crack growth are performed for 316 stainless steel specimens subjected to tension at high temperature with a semi-elliptical surface crack. Using two independent finite element analyses based on the fracture mechanics and continuum damage mechanics respectively, crack growth behaviors including crack profile development, crack size and propagation time are investigated and compared with each other and corresponding experimental data. The comparisons enable to show the different capabilities of the two approaches in predictions of creep crack growth.
Creep crack growth Fracture mechanics Continuum damage mechanics Finite element analysis
Jian-Feng Wen Shan-Tung Tu
Key Laboratory of Pressure Systems and Safety (Ministry of Education),School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,PR China
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）