碳纤维复合材料损伤的非线性超声及声发射联合检测研究  

Damages Detection of Carbon Fiber Composites Based on Nonlinear Ultrasonic and Acoustic Emission Technologies

作　　者：孙荣鑫 李伟[1] 闫孝伟 蒋鹏[1] 孙平 SUN Rong-xin;LI Wei;YAN Xiao-wei;JIANG Peng;SUN Ping(School of Mechanical Science and Engineering,Northeast Petroleum University)

机构地区：[1]东北石油大学机械科学与工程学院

出　　处：《化工机械》2022年第3期394-399,共6页Chemical Engineering & Machinery

基　　金：国家重点研发计划项目(2017YFC0805604);东北石油大学青年科学基金项目(2018QNL-32)。

摘　　要：采用非线性超声和声发射检测技术联合对复合材料损伤过程进行检测研究,实现对复合材料更完善的损伤检测,通过对复合材料各阶梯加载阶段的损伤检测,发现二次非线性系数在材料损伤早期呈现递增趋势,随着损伤的加剧二次非线性系数逐渐降低,而声发射信号则随损伤的加剧呈现单一递增趋势,实验结论表明在材料早期损伤中非线性超声比声发射技术更加敏感,且无需加载检测,而在损伤后期声发射技术与损伤程度更具有一致性。In this paper,nonlinear ultrasonic and acoustic emission detection techniques were adopted to detect damage process of composite materials and realize a more perfect damage detection of composite materials.Detecting each loading stage of composite materials finds that,the quadratic nonlinear coefficient increases gradually in early stage of the material damage and then decreases with the damage aggravation and the acoustic emission signal shows a single increasing trend with the aggravation of damage.The experimental results show that,in the early stage of material damage,nonlinear ultrasound becomes more sensitive than acoustic emission technology and the loading detection becomes unnecessary;the acoustic emission technology complies with the damage degree in the later stage of damage.

关 键 词：复合材料 非线性超声 非线性系数 声发射(AE) 损伤检测 

分 类 号：TQ050.43[化学工程]