The Numerical Analysis and Experimental Study of the Stress Intensity Factor and Outer Surface Strain of the Pressure Pipe with Internal Longitudinal-Cracks

摘要：

　　The strain characteristics in the outer surface of the pipe and the stress intensity factor in crack front with internal longitudinal-cracks were analyzed by the finite element method.According to the results of analysis,the outer surface strain variation to crack size was got and the relationship of stress intensity factor and crack size was known.Based on resistance strain gauges and fiber optic sensing technology,pressure pipe crack extension monitoring device was designed and the outer surface circumferential strain were tested.The results of finite element analysis and experiment are in good agreement.The outer surface strain variation in this paper can be used to analyze the situation of internal longitudinal-cracks exten sion.That relationship of stress intensity factor and crack size has an important reference to the safety assessment of pipe with internal longitudinal-crack.

关键词： internal longitudinal-crack fiber grating sensor strain variation the stress intensity factor

作者: HE Jia-Sheng Yan Mengqi ZHU Xiao-Ming

作者单位: School of Mechanical Engineering,Wuhan Institute of Technology,Wuhan 430074,China Wuhan Subsidiary company,China Petrochemical Co.Ltd.,Wuhan 430082,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: 221-225

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）