静载下CFRP加固管柱的AE特征信号分析  

Analysis of AE Characteristic Signal of CFRP-reinforced Tubular Columns Under Static Loading

作　　者：王朋飞 石健[1] 邵永波[2] 朱红梅 WANG Pengfei;SHI Jian;SHAO Yongbo;ZHU Hongmei(School of Mechanical Engineering,Southwest Petroleum University,Chengdu 610500,China;School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]西南石油大学土木测绘学院,成都610500

出　　处：《机械科学与技术》2023年第11期1937-1945,共9页Mechanical Science and Technology for Aerospace Engineering

基　　金：四川省青年科技创新研究团队(2019JDTD0017)。

摘　　要：为研究腐蚀管柱加固前后的承载力变化,使用声发射仪采集了准静态压缩过程中有腐蚀缺陷和经碳纤维增强复合材料(CFRP)加固的管柱构件的声发射参数。通过比较声发射的撞击数、幅度、均方根植(RMS)、振铃计数率和累积能量计数等参数,对构件的承载力进行了研究。结果表明:声发射特征参数能够较好的体现构件材料的弹性阶段、屈服阶段、强化阶段、颈缩和断裂过程;幅度和RMS可以反映试验过程中试件内部损伤破坏进程;振铃计数和累积能量的变化趋势能够体现管柱构件的压缩变形过程;CFRP加固后的管柱变形小,承载力提高,声发射振铃计数降低,累积能量计数增大。To study the changes in the bearing capacity of the corroded pipe string before and after reinforcement,the acoustic emission instrument was used to collect the acoustic emission parameters of the tubular column members with corrosion defects and carbon fiber-reinforced polymer(CFRP)reinforcement during the quasi-static compression process.By comparing the number of hits,amplitude,root of mean square(RMS),counts rate,and cumulative energy count of acoustic emission parameters,the bearing capacity of the components was studied.The result shows that the acoustic emission characteristic parameters can better reflect the elastic phase,yielding phase,strengthened phase,necking,and fracture process of component materials.Amplitude and RMS can reflect the internal damage and destruction process of the specimen during the test.The changing trend of acoustic emission counts and acoustic emission accumulated energy can reflect the compression process of tubular columns.The deformation of the tubular columns with CFRP-reinforced is small,the bearing capacity is improved,the acoustic emission count is reduced,and the acoustic emission accumulated energy is increased.

关 键 词：声发射 腐蚀缺陷 管柱 静态压缩 承载力 

分 类 号：TE58[石油与天然气工程—油气田开发工程]