碳纤维复合材料激光超声检测方法研究

发布时间：2018-01-05 10:15

本文关键词：碳纤维复合材料激光超声检测方法研究　出处：《压电与声光》2017年02期 　论文类型：期刊论文

【摘要】：激光超声检测技术具有非接触、快速及高效等优点,在复合材料无损检测领域应用前景较好。该文研究了激光热弹激发超声应力的机理,构建了非接触式扫描激光超声检测系统,用于碳纤维复合材料结构健康状况的实时在线检测。实验研究了超声信号与激光参数和接收距离等参数间的关系。实验结果表明,激光超声检测技术可有效用于碳纤维复合材料结构健康检测;建立的碳纤维复合材料激光超声检测系统采用了扫描激光技术,单次检测仅需0.1s,提高了检测效率,且装置简单,操作方便,易于安装调试;热弹范围内超声信号幅值随激光能量增大而增大,随接收距离增大而减小。
[Abstract]:The laser ultrasonic detection technology has the advantages of non-contact, fast and efficient advantages in the field of application of nondestructive testing of composite materials is better. This paper studies the thermoelastic mechanism of laser ultrasonic stress, constructed a non-contact scanning laser ultrasonic detection system for real-time online detection of health status of carbon fiber composite structure. Experimental study the relationship between the parameters of the ultrasonic signal and the laser parameters and the distance between the receiver. The experimental results show that the laser ultrasonic detection technology can be effectively used for carbon fiber composite structural health detection; carbon fiber composite material of the laser ultrasonic detection system using laser scanning technology, single detection is only 0.1s, and improve the detection efficiency. The device is simple, convenient operation, easy installation and debugging; the thermal elastic range of ultrasonic signal amplitude increases with the increase of laser energy, with the increase of receiving distance is reduced.

【作者单位】：西安工程大学机电工程学院;武警工程大学装备工程学院;
【基金】：国家自然科学基金资助项目(51305458) 西安工程大学学科建设经费资助项目
【分类号】：TN249;TB332
【正文快照】： 0引言碳纤维复合材料具有高强度、高硬度、小密度及轻质量等优点,已广泛应用于航空航天领域[1]。碳纤维复合材料采用碳纤维等高性能增强相增强复合材料性能,其制造工艺独特,但生产过程中工艺稳定性较差,且其包含多样组分及各项异性,使其存在制造缺陷。这些缺陷将导致碳纤维

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