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首页> 外文期刊>Journal of Composite Materials >Qualitative comparison of non-destructive methods for inspection of carbon fiber-reinforced polymer laminates
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Qualitative comparison of non-destructive methods for inspection of carbon fiber-reinforced polymer laminates

机译：碳纤维增强聚合物层压板检查非破坏性方法的定性比较

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In the rapidly expanding composite industry, novel inspection methods have been developed in recent years. Particularly promising for air-coupled testing are cellular polypropylene transducers which offer better impedance matching to air than piezoelectric transducers. Furthermore, broadband transmitters (laser-induced ultrasound and thermoacoustic emitters) and receivers (optical microphones) have opened a completely new chapter for advanced contact-free ultrasound inspection. X-ray dark-field radiography offers a different approach to detect porosity and microcracks, employing small angle X-ray scattering. These innovative ultrasonic and radiographic alternatives were evaluated in comparison with well-established inspection techniques. We applied thirteen different non-destructive methods to inspect the same specimen (a carbon fiber-reinforced polymer laminate with induced impact damage): air-coupled ultrasound testing (using piezoelectric transducers, broadband optical microphones, cellular polypropylene transducers, and a thermoacoustic emitter), laser-induced ultrasound testing, ultrasonic immersion testing, phased array ultrasonic testing, optically excited lock-in thermography, and X-ray radiography (projectional absorption and dark-field, tomosynthesis, and micro-computed tomography). The inspection methods were qualitatively characterized by comparing the scan results. The conclusions are advantageous for a decision on the optimal method for certain testing constraints.
机译：在快速扩大的复合行业中，近年来开发了新的检验方法。特别是对空气耦合测试的承诺是蜂窝聚丙烯换能器，其提供比压电换能器的空气更好的阻抗匹配。此外，宽带发射器（激光诱导的超声波和热声发射器）和接收器（光学麦克风）已经为先进的无接触超声检查打开了全新的章节。 X射线暗场造影提供了一种不同的方法来检测孔隙率和微裂纹，采用小角度X射线散射。与良好的检查技术相比，评估了这些创新的超声波和放射线照相替代品。我们应用十三种不同的无损方法来检查相同的样本（碳纤维增强聚合物层压板，诱导抗冲击损伤）：空气耦合超声检测（使用压电换能器，宽带光学麦克风，蜂窝聚丙烯传感器和热声发射器） ，激光诱导超声检测，超声浸渍测试，相控阵超声波检测，光学激发锁定热成像，以及X射线放射线照相（突出射击和暗场，自来合成和微计算断层扫描）。通过比较扫描结果，定性表征检查方法。结论是有利的关于某些测试限制的最佳方法的决定。

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