Finite Element Simulation of the Creep Behavior of 2.25Cr-1Mo-0.25V Steel Based on Continuum Damage Mechanics

摘要：

　　The creep behavior of 2.25Cr-1Mo-0.25V ferritic steel was investigated using a set of physically-based creep damage constitutive equations.The appropriate material constants were determined according to the creep experimental data under multi-stress levels, using an efficient genetic algorithm.The user-defined subroutine for creep damage evolution was developed based on the commercial finite element software ANSYS and its user programmable features (UPFs), and the numerical simulation of the stress distribution and the damage evolution of the semi Ⅴ-type notched specimen during creep was studied.The results showed that the genetic algorithm is a very efficient optimization approach for the parameter identification of the creep damage constitutive equations, and finite element simulation based on continuum damage mechanics can be used to analyze and predict the creep damage evolution under multi-axial stress states.

关键词： continuum damage mechanics genetic algorithm finite element simulation creep damage

作者: Yu Zhou Xuedong Chen Zhichao Fan Yichun Han

作者单位: National Engineering Technical Research Center on PVP Safety,Hefei General Machinery Research Instit National Engineering Technical Research Center on PVP Safety,Hefei General Machinery Research Instit

会议类型: 国际会议

会议名称: 2014 International Symposium on Structural Integrity,ISSI2014(2014国际结构完整性学术会议)

会议地点: 兰州

会议语种:英文

页码: 401-406

在线出版日期: 2014-08-20（万方平台首次上网日期，不代表论文的发表时间）