摘要
在X6 5管线钢H2 S应力腐蚀试验的基础上 ,建立了三维弹塑性有限元模型 .通过三维弹塑性有限元的数值分析 ,得到了裂纹尖端应力场分布和氢浓度的分布特征 .通过对X6 5管线钢焊接接头的显微组织观察和基本力学性能研究 ,对影响其应力腐蚀影响因素提供了实验依据 .并根据楔形张开加载恒位移试样得出了X6 5管线钢焊接接头的临界应力强度因子KISCC和裂纹扩展速率 。
Based on the H 2S stress corrosion test for X65 pipeline steel,three-dimensional elastic-plastic finite element model was established.By the numerical analysis of the FEM,stress field and concentration distribution character of hydrogen from the crack tip were obtained.This paper surveyed the microstructure of the joints and studied on the mechanical performance of X65 pipeline steel.It provided experiment basis for the affecting factors of stress corrosion cracking.Moreover,the critical stress intensity factor K ISCC and crack propagation velocity were obtained by the wedge-open loading constant displacement specimens.The result of stress corrosion was verified by finite element numerical analysis.
出处
《中国腐蚀与防护学报》
CAS
CSCD
2004年第1期20-24,共5页
Journal of Chinese Society For Corrosion and Protection
关键词
应力腐蚀
有限元
显微组织
临界应力强度因子
stress corrosion,finite element,microstructure,critical stress corrosion factor
