摘要
针对受限于复合结构的厚度、层数、材料种类等因素导致超声回波信号混叠,难以实现界面脱粘检测的问题,提出一种直接利用超声纵波反射混叠信号的能量特征进行复合结构脱粘缺陷检测的方法。首先建立单层与多层复合结构的超声信号反射与透射特性模型;然后提取并分析不同界面粘接状态下结构的超声回波能量特征,并基于该模型进行钢-橡胶-橡胶复合结构的脱粘检测仿真,通过引入能量差异值进行脱粘界面识别;最后,利用超声波探伤设备对钢-橡胶-橡胶复合结构试样进行实际脱粘缺陷检测。理论分析和实验验证均表明,该方法可以实现多层复合结构脱粘缺陷的有效检测。
In view of the aliasing of ultrasonic echo signal due to the constraints of thickness,number of layers,and types of composite materials,a method for detecting the interface debonding of composite structures was proposed in this paper,which directly used the energy characteristics of the ultrasonic longitudinal wave reflection of the aliasing signal.Firstly,the ultrasonic signal reflection and transmission characteristic model of single-and multi-layer composite structures was established.Then,the ultrasonic echo energy characteristics of structures under different interface bonding states were extracted and analyzed.Based on this model,the debonding detection simulation of steel-rubber-rubber composite structures was carried out.The interface debonding was identified by the introduction of energy difference of signals.Finally,the steel-rubber-rubber composite structural debonding samples were discovered by the ultrasonic flaw detection equipment.Both theoretical analysis and experimental verification show that the proposed method may realize effective defect detection of multi-layer composite structures.
作者
封华楠
王鉴
聂鹏飞
秦鹏
韩焱
FENG Huanan;WANG Jian;NIE Pengfei;QIN Peng;HAN Yan(Shanxi Key Laboratory of Signal Capturing&Processing,North University of China;Shanxi Research Center of Modern NDT Engineering Technology,North University of China:Taiyuan,030051,China)
出处
《航天器环境工程》
CSCD
2024年第2期211-218,共8页
Spacecraft Environment Engineering
基金
山西省基础研究计划项目(编号:202103021224189)。
关键词
多层复合结构
界面脱粘缺陷
超声反射模型
能量特征
超声检测
multi-layer composite structures
interface debonding defect
ultrasonic reflection model
energy characteristics
ultrasonic testing
