玻璃纤维增强复合材料超声检测声场的CIVA仿真与试验研究

CIVA simulation and experimental study on ultrasonic testing sound field of glass fiber reinforced composites

针对单晶片超声检测玻璃纤维增强复合材料层压板内声场分布,使用CIVA软件得到了不同楔块厚度下材料内部声场的变化规律;同时进行试块内不同规格的预制缺陷仿真试验,通过对缺陷进行B扫图及A扫回波波形分析,得到不同深度缺陷回波特点及波高规律。最后,使用超声检测仪器对制作的玻璃纤维层压板进行实际检测验证试验。试验结果表明:不同尺寸及埋深的分层缺陷的波形特点及检测结果与仿真试验结果相同;当缺陷距离表面太近时,检测得到的尺寸比实际缺陷大很多;当缺陷位于层压板中间时,检测结果均接近实际尺寸;当缺陷位于层压板底部时,检测结果比实际尺寸小。

For ultrasonic testing of the sound field distribution in the glass fiber reinforced laminate,the change law of the sound field in the material with different thickness wedges was obtained by using CIVA software.At the same time,conducting the simulation test of prefabricated defects with different specifications in the test block,through the analysis of B-scan and A-scan echo waveforms of defects,the echo characteristics and wave height rules of defects with different depths are obtained.Finally,the ultrasonic testing instrument is used to carry out the actual inspection and verification test on the glass fiber laminate made.The test results show that the waveform char-acteristics and detection results of layered defects with different sizes and buried depths are the same as the simula-tion test results.When the defect is too close to the surface,the detected size is much larger than the actual defect;when the defect is in the middle of the laminate,the detection results are close to the actual size;when the defect is at the bottom of the laminate,the detection result is smaller than the actual size.