摘要
针对4层"钢-铅-钢-铅"的粘接结构,分别采用红外热像法、激光超声成像法和中子照相法等进行非接触检测,并对其优势和劣势进行了分析。研究结果表明:红外热像法能实现"钢-铅"粘接结构的非接触检测,但检测时加载的强烈热信号降低了缺陷信号的信噪比,使图像清晰度及大小的准确定量受到影响,需改进电磁热激励线圈的设计,并采用仿真建模分析解决上述问题;激光超声成像法能有效检测出2层粘接结构中准2以上的脱粘缺陷,但对于多层粘接结构需通过更加复杂有效的缺陷特征信号分析和提取方法等达到目的;中子照相法在检测"钢-铅"结构中的EP(环氧树脂)胶粘剂分布方面具有特殊优势,能检测出4层"钢-铅"粘接结构中准1的脱粘缺陷,是一种较理想的检测方法。
The four layers-bonding structure with steel-lead -steel-lead was respectively tested by some noncontact methods such as infrared thermal-imaging method,laser-ultrasonic imaging method and neutron radiography method. And their advantages and disadvantages were analysed. The research results showed that the non-contact testing of bonding structure with steel-lead could be realized by infrared thermal-imaging method, but the signal-to-noise ratios of defect signals were reduced by intense heat-signals of excitation at testing,so the image resolution and size at accurate ration were affected ,the design of electromagnetic thermal excitation coil need be improved,and the aforementioned problems were solved by simulation modeling analysis. The defects more than ~b2 in two layers-bonding structure could effectively detected by laser-ultrasonic imaging method,but the aforementioned defects in muhilayers-bonding structure could be detected by more complex-effective analysis and extraction method of characteristic signals from defects. The neutron radiography method was an ideal method because it had some special advantages in detecting EP（epoxy resin） adhesive distribution with ＂steel-lead＂ structure ,and the debonding defects of Ф1 in four layers-bonding structure with ＂steel-lead＂ could be detected.
出处
《中国胶粘剂》
CAS
北大核心
2013年第7期21-24,33,共5页
China Adhesives
基金
国防科工委技术基础课题基金项目(Z112011C001)
关键词
非接触
粘接结构
无损检测
多层结构
non-contact
bonding structure
nondestructive testing
muhilayer structure
