碳纤维复合材料损伤的超声检测与成像方法研究进展

Progress in ultrasonic testing and imaging method for damage of carbon fiber composites

  • 摘要: 碳纤维复合材料具有密度小、弹性高和韧性好等特点,被广泛应用于航空航天和汽车工业等领域。由于碳纤维复合材料制作工艺的复杂性和不稳定性及服役期间易受环境的影响,易产生分层、孔隙、纤维褶皱等各种类型的损伤。介绍了基于体波或导波的C扫描、相控阵、空气耦合、激光超声、光纤超声检测技术的原理、特点及用于碳纤维复合材料损伤检测的研究现状。综述了最具有代表性的损伤诊断成像算法,包括全聚焦成像、三维可视化成像、层析成像、逆时偏移成像和概率成像方法,这些成像方法能够有效地实现碳纤维复合材料各种类型的损伤形貌图像。从建立复杂构件的碳纤维复合材料层合板的阵列声场模型、优化损伤成像算法、构建智能/高效/实时化的结构健康监测成像系统、建立损伤定量评估标准、结合机器学习和数字孪生技术实施损伤诊断评估和寿命预测等方面进行了展望。

     

    Abstract: Carbon fiber composites are widely used in aerospace and automotive industries due to the characteris-tics of low density, high elasticity, and better toughness. Due to the complexity and instability of the manufacturing process of carbon fiber composites and their vulnerability to environmental impact during service, it is likely to generate delamination, porosity, fiber wrinkle, and other types of damage. In this paper, the principles and characteristics of C-scan, phased array, air-coupled, optical fiber-ultrasound, and laser-ultrasonic testing based on body or guided waves, as well as the research status of these technologies for damage detection of carbon fiber compo-sites, are introduced respectively. The most representative imaging algorithms for damage diagnosis are shown, including total-focus imaging, 3D visualization imaging, tomography, reverse time migration imaging, and probability imaging method, these imaging methods can effectively realize various types of damage morphology in carbon fiber composites. The prospect is made from the following aspects: The establishment of an array acoustic field model of carbon fiber composite laminates, the optimization of damage imaging method, the construction of intelligent/efficient/real-time structural health monitoring imaging system, the establishment of damage quantitative evaluation criteria, and combination of machine learning and digital twin technology for damage diagnosis assessment and life prediction.

     

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