Numerical Investigation on Creep Crack Growth of Brazed Joint Using Different Damage Models

摘要：

　　In this paper,four types of creep damage models (Kachanov-Robotnov,Liu-Murakami,Cocks-Ashby and Wen-Tu model) were used to study the creep crack growth (CCG) behavior in compact tension (CT) specimen of Hastelloy C-276/BNi-2 brazed joint.The results show that the creep damage model has a great influence on the CCG behavior of brazed joint.The crack-tip stress states,da/dt-C* curves,crack initiation time and rupture life are different for the different damage models.The Kachanov-Rabotnov model can lead to higher CCG rate and shorter rupture life,while the Cocks and Ashby model can reduce CCG rate and prolong the rupture life.The model order in terms of the CCG rate from high to low is K-R,L-M,W-T,C-A model,which is opposite order of crack initiation time.In the simulation of CCG of brazed joint,a precious damage model should be employed for life prediction.

关键词： Brazed joint Creep damage Crack growth Life prediction

作者: Yun Luo Qian Zhang Wenchun Jiang

作者单位: College of Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,PR China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 231-235

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）