基于临界折射纵波法的CFRP应力检测  

Stress Measurement in CFRP Composites Using Critically Refracted Longitudinal Waves

作　　者：王伟[1] 邓亚 张宇民[1] 周玉锋[1] 陈栋康康 WANG Wei;DENG Ya;ZHANG Yumin;ZHOU Yufeng;CHEN Dongkangkang(Science and Technology on Advanced Composites in Special Environments Laboratory,Harbin 150080)

机构地区：[1]哈尔滨工业大学特种环境复合材料技术国防科技重点实验室,哈尔滨150080

出　　处：《宇航材料工艺》2018年第4期67-70,共4页Aerospace Materials & Technology

基　　金：国家重点基础研究发展计划(973子课题:2014CB046505)

摘　　要：研究了不同纤维方向与应力方向对复合材料声弹性关系的影响。为了在材料内部激励临界折射纵波,本文根据斯涅耳定律设计了超声入射楔块,并搭建了声时差检测系统。并使用搭建的系统分别测量了0°、45°单向铺设的两种试样在0°、45°和90°方向的声时差变化,得到了不同加载方向和纤维方向组合情况下,由CFRP材料内部应力与声时差表征的声弹性关系。The acoustoelastic relations in different fiber and loading directions were studied.With the aim of exciting LCR waves in the material,an incidence wedge was designed according to the snell＇s law.In addition,a system for measuring the time of fight（TOF） was set up.The system was used to measure the TOF variations along 0°,45° and 90° directions of 0° and 45° specimens of CFRP composites.As results,the acoustoelastic relations expressed by internal stress and TOF in different fiber and loading directions were obtained.

关 键 词：临界折射纵波 CFRP复合材料 声弹性关系 斯涅耳定律 

分 类 号：TB332[一般工业技术—材料科学与工程]