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首页> 外文期刊>International Journal of Microstructure and Materials Properties >Laser ultrasonic guided wave methods for defect detection and materials characterisation
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Laser ultrasonic guided wave methods for defect detection and materials characterisation

机译:激光超声导波方法用于缺陷检测和材料表征

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摘要

Laser ultrasonic sources and guided wave sensing methods, using non-contact transducers or sub-wavelength miniature sensors, are utilised to nondestructively evaluate structural defects or composite material properties. These methods enable in-plane ultrasonic signal testing and very accurate measurements of the ultrasonic directional velocities. Additionally, sensing of the guided wave modes changes, in the geometrically complex composite structures, enables detection of the material structural damage. Experimental data demonstrates reproducibility and feasibility of such tests to sense discontinuity (crack) type defects and characterise micro structural damage in the composite materials.
机译:使用非接触式换能器或亚波长微型传感器的激光超声源和导波感测方法可用于无损评估结构缺陷或复合材料性能。这些方法可以进行面内超声信号测试,并且可以非常精确地测量超声方向速度。另外,在几何复杂的复合结构中,通过检测导波模式的变化,可以检测材料的结构损伤。实验数据证明了这种测试的可重复性和可行性,以检测不连续(裂纹)类型的缺陷并表征复合材料中的微观结构损伤。

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