编织复合材料低速冲击损伤超声热成像检测  

Low-velocity Impact Damage Detection of Woven Composites Based on Ultrasonic Infrared Thermography

作　　者：李胤 宋远佳[1] 江海军 陈飞 张凯 LI Yin;SONG Yuanjia;JIANG Haijun;CHEN Fei;ZHANG Kai(China Aerodynamics Research and Development Center,Mianyang 621000,China;Novelteq Ltd.,Nanjing 210014,China)

机构地区：[1]中国空气动力研究与发展中心,四川绵阳621000 [2]南京诺威尔光电系统有限公司,江苏南京210014

出　　处：《红外技术》2023年第8期876-883,共8页Infrared Technology

基　　金：国家自然科学基金(52005495);中国空气动力研究与发展中心基础和前沿技术研究基金(PJD20200223)。

摘　　要：编织复合材料低速冲击损伤主要为内部的分层损伤,采用目视检测无法有效检测损伤,损伤使得结构承载能力严重降低,威胁编织复合材料构件的安全使用。本文使用超声红外热成像技术对编织复合材料低速冲击损伤进行无损检测研究,使用10J、20J、30J、40J、50J的冲击能量制作了5个试件。对超声激励过程的温升曲线、空间温度曲线进行了详细分析;对比不同冲击能量试件发现,低速冲击下损伤主要是内部损伤,冲击能量越大,损伤区域越大,且损伤具有延展性。采用曲线分类算法对损伤区域进行了定量识别,发现编织复合材料损伤面积和冲击能量成线性关系。Low-velocity impact damage of woven composites is mainly caused by internal delamination damage,which cannot be effectively detected by visual inspection;this seriously reduces the structural load-bearing capacity and threatens the safe use of the compiled composite components.In this study,ultrasonic infrared thermography was used to perform nondestructive testing of the low-velocity impact damage of woven composites,and five specimens were produced using impact energies of 10,20,30,40,and 50 J.The temperature increase and space temperature curves of the ultrasonic excitation process were analyzed.By comparing different impact energy specimens,it was found that the damage under low-speed impact was mainly internal,and the larger the impact energy,the larger the damage area.Moreover,the damage was ductile.The damage area was identified quantitatively using a curve classification algorithm.It was found that the damage area of woven composites and the impact energy were linearly correlated.

关 键 词：超声红外热成像 编织复合材料 低速冲击损伤 无损检测 

分 类 号：V45[一般工业技术—材料科学与工程]