整体模压绝热结构空气耦合超声波C扫描检测

Air-coupled Ultrasonic C-scan Testing of Whole Molded Insulation Structure

整体模压绝热结构是碳纤维缠绕壳体的重要抗冲刷、抗烧蚀和承压结构。采用空气耦合超声波对整体模压绝热结构进行了检测试验。试验结果显示,空气耦合超声波C扫描检测可有效检测出整体模压绝热结构内部Φ10mm及以上的分层、脱粘缺陷。使用的探头频率越高,检测灵敏度越高,缺陷边缘越清晰。

As an important erosion resistant and pressure-bearing structure of carbon-fiber wound shell,whole molded insulation structure is widely used.The air-coupled ultrasonic testing experiments were carried out on whole molded insulation structure.The results show that the delamination and debonding defects ofΦ10mm or more in the whole molded insulation structure can be detected by air-coupled ultrasonic C-scan testing,the higher the probe frequency,the higher the detection sensitivity and the clearer the defect edge.