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Guided Wave Based Damage Assessment in X-COR Composite Sandwich Structures

机译：X-COR复合夹芯结构中基于导波的损伤评估

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摘要

A Lamb wave based numerical model is developed to qunaitfy the effect of different sizes of damages on the wave propagation behavior in X-COR composites. Two models are developed (i) model with homogenized material properties (ii) model with explicit modeling of carbon pins. The differences in sensor signals between the homogenized and non-homogenized model are studied and quantified using the time-of-flight and wave amplitudes. Next, the changes in displacement fields and sensor signals due to the presence of delamination damage are investigated, and the results show that the delamination can be detected by comparing the signal features with those obtained from the healthy plate, even in the presence of the through thickness carbon pins. At last, the simulation results indicate that the size of delamination damage effects on the output sensor signal showing the potential in developing a predictive model for real-time damage quantification.
机译：建立了基于Lamb波的数值模型，以研究不同大小的损伤对X-COR复合材料中波传播行为的影响。开发了两个模型（i）具有均质材料特性的模型（ii）具有显式建模碳销的模型。使用飞行时间和波幅来研究和量化均质模型和非均质模型之间传感器信号的差异。接下来，研究了由于分层破坏的存在而引起的位移场和传感器信号的变化，结果表明，即使在存在贯通孔的情况下，也可以通过将信号特征与从健康平板获得的信号特征进行比较来检测分层。厚度的碳销。最后，仿真结果表明分层损伤对输出传感器信号的影响，表明了开发实时损伤定量预测模型的潜力。

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