激光超声检测碳纤维增强树脂基复合材料的缺陷评估技术研究

Evaluation of Defects in Carbon Fiber-Reinforced Composites by Laser Ultrasonic Technique

摘要: 采用激光超声检测技术，研究了碳纤维增强树脂基复合材料中常见缺陷的激光超声信号特征与缺陷识别评估方法。结果表明，利用L波的特征和变化，可有效地提取反映复合材料中缺陷的声波信息；根据L波的幅值和衰减变化规律，可进行缺陷的判别，确定缺陷的性质。

Abstract: Laser ultrasonic technique has been applied to nondestructive evaluation of defects in carbon fiber-reinforced composites (CFRCs). The results presented in this paper have shown that the ultrasonic signal characterization associated with the defects in CFRCs can be extracted from longitudinal (L) wave. The amplitude and attenuation of L wave can be used to discriminate and evaluate defects.