腐蚀损伤的激光超声可视化成像检测  

Laser ultrasonic visual imaging detection of corrosion damage

作　　者：尚晓壮 刘瑶璐[1,2] 周世杰[1] 宁慧铭[1,2] 胡宁[1,3] SHANG Xiaozhuang;LIU Yaolu;ZHOU Shijie;NING Huiming;HU Ning(College of Aerospace Engineering,Chongqing 400044,P.R.China;Chongqing Key Laboratory of Heterogeneous Material Mechanics,Chongqing University,Chongqing 400044,P.R.China;School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,P.R.China)

机构地区：[1]重庆大学航空航天学院,重庆400044 [2]重庆大学非均质材料力学重庆市重点实验室,重庆400044 [3]河北工业大学机械工程学院,天津300401

出　　处：《重庆大学学报》2022年第12期94-102,共9页Journal of Chongqing University

基　　金：国家自然科学基金项目(11632004,U1864208);深空探测省部共建协同创新中心开放课题(SKTC202108);国家科技重大专项项目(2017-VII-0011-0106);河北省自然科学基金创新群体研究项目(A2020202002);河北省重点研发计划(202030507040009);天津市科技计划项目(20ZYJDJC00030);天津市自然科学基金重点项目(S20ZDF077)。

摘　　要：腐蚀损伤广泛存在于国防科技、交通运输等工业领域,严重威胁了结构的安全性和可靠性,因此对腐蚀损伤的安全检测具有重要意义。依据激光超声的基本理论,采用自主设计的全自动激光超声扫描实验系统,通过对铝板中的腐蚀损伤进行激光扫描实验,分析了Lamb波能量、幅值和腐蚀之间的关系,并依据“弹性波能流法”的原理,利用幅值最大值完成了损伤区域的可视化;提出了一种评估铝板腐蚀程度的方法——能量比较法,完成了对不同腐蚀程度的铝板的评估分析。该研究可实现腐蚀缺陷的快速检测与评估,并且检测结果直观可视,展现了巨大的应用前景。Corrosion damage exists extensively in material structures in the industries,such as national defense and transportation,which threatens the safety and reliability of the structure seriously.Therefore,it is of great significance to monitor corrosion damage in materials.In this paper,based on the theory of laser ultrasound,an automatic laser scanner detection system was designed and developed.The laser scanning experiments were carried out on the corrosion damage in the aluminum plate through this system,and the relationship among the Lamb wave energy,amplitude and corrosion was analyzed.The damage area was visualized with the maximum amplitude according to the principle of“elastic wave energy flow method”.Finally,the amplitude integral ratio method was proposed,which can be used to evaluate the degree of corrosion damage.The proposed method can realize the rapid detection and evaluation of corrosion defects with the detection results being visualized,showing a great potential in application.

关 键 词：激光超声 腐蚀损伤 LAMB波 可视化成像 损伤程度评估 

分 类 号：TB553[理学—物理]