NONLINEAR ULTRASONIC CHARACTERIZATION USING THE NONCOLLINEAR METHOD
NONLINEAR ULTRASONIC CHARACTERIZATION USING THE NONCOLLINEAR METHOD
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DOI：
10.1063/1.3591872
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
A. Croxford;B. Drinkwater;P. Wilcox
中科院分区：
文献类型：
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作者：
A. Croxford;B. Drinkwater;P. Wilcox
使用超声波测量材料非线性是一个很有吸引力的概念，它提供了比传统技术更早检测疲劳损伤的可能性。尽管有这种优势和在该领域的大量工作，目前开发的方法主要限于实验室环境。这是由于很难将材料非线性与设备产生的非线性分开。本文报道了一种消除这一问题的方法。当两个剪切波相互作用时，由于材料的非线性而产生第三波。本文展示了如何这种相互作用可以用来测量材料性能受损标本。它继续表明，这种方法可以用于测量材料的非线性跨越试样。
The measurement of material non‐linearity using ultrasound is an attractive concept, offering the potential to detect fatigue damage earlier than is possible with conventional techniques. Despite this advantage and much work in the field the currently developed approaches are primarily limited to the lab environment. This is due to the difficulty in separating the material nonlinearity from that generated by equipment. This paper reports on an approach that eliminates this problem. When two shear waves interact a third wave is generated due to the material nonlinearity. This paper shows how this interaction can be used to measure material properties in damaged specimens. It goes on to show that this approach can be used to make measurements of material non‐linearity both across a specimen.