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首页> 外文期刊>Journal of Nondestructive Evaluation >Single-Sided Ultrasonic Technique to Characterize Thick FRP Composites
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Single-Sided Ultrasonic Technique to Characterize Thick FRP Composites

机译：单面超声技术表征厚FRP复合材料

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摘要

This paper reports on the development of a single-sided, laser ultrasonic technique that is capable of measuring all of the engineering constants of a pultruded FRP composite structural member. The complex nature of these members (which are used in civil infrastructure applications) precludes the determination of all of the engineering constants using mechanical tests, while immersion ultrasonic techniques have certain drawbacks. The proposed technique, which uses a combination of contact piezoelectric and optical methodologies, does not call for cutting the specimen or placing it in an immersion tank. Optical generation and detection of ultrasound enable the direct measurement of the longitudinal and surface acoustic wave speeds in the pultrusion direction, without requiring access to the ends of the specimen, or relying on reflected quasilongitudinal waves. The measured engineering constants are compared to immersion technique results, and the advantages of the proposed technique are clearly demonstrated.
机译：本文报道了一种开发单面激光超声波技术，能够测量拉挤FRP复合结构构件的所有工程常数。这些成员的复杂性质（用于民用基础设施应用）的复杂性妨碍了使用机械测试的所有工程常数的测定，而浸入式超声波技术具有一定的缺点。所提出的技术，使用接触压电和光学方法的组合，不呼叫将样品切割或将其放入浸入罐中。光学产生和检测超声使得能够直接测量拉挤成型方向上的纵向和表面声波速度，而不需要进入样本的端部，或者依赖于反射的准波。将测量的工程常数与浸入技术结果进行比较，并且清楚地证明了所提出的技术的优点。

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