Locating delaminations in laminated composite beams using nonlinear guided waves
Locating delaminations in laminated composite beams using nonlinear guided waves
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DOI：
10.1016/j.engstruct.2016.11.010
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发表时间：
2017-01
影响因子：
5.5
通讯作者：
Reza Soleimanpour;C. Ng
中科院分区：
文献类型：
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作者：
Reza Soleimanpour;C. Ng
提出了一种利用非线性导波检测和定位复合材料层合梁分层的新方法。结果表明，当入射波在分层处相互作用时，由于接触声非线性（CAN），波与分层处接触界面相互作用的非线性效应产生高次谐波导波。该方法采用换能器网络，利用高次谐波导波对分层进行检测和定位。顺序扫描通过在其中一个换能器上驱动导波的基本反对称模式（A0）来检测层合复合梁，而其余换能器用于测量冲击波。采用三维显式有限元模拟进行了一系列数值案例研究，其中考虑了不同的分层位置，长度和通过厚度位置。实验案例研究进一步验证和证明了所提出方法的能力。结果表明，该方法能够利用高次导波准确地检测和定位复合材料层合梁中的分层现象。该方法的优点之一是不依赖基线数据来检测和定位分层，因此受操作和环境条件变化的影响较小。
This paper proposes a new method for detecting and locating delaminations in laminated composite beams using nonlinear guided wave. It is shown that when incident wave interacts at the delamination, the nonlinear effect of wave interaction with contact interfaces at the delamination generates higher harmonic guided waves due to contact acoustic nonlinearity (CAN). The proposed method employs a transducer network to detect and locate the delamination using the higher harmonic guided waves. A sequential scan is used to inspect the laminated composite beams by actuating the fundamental anti-symmetric mode (A0) of guided wave at one of the transducers while the rest of the transducers are used for measuring the impinging waves. A series of numerical case studies are performed using three-dimensional explicit finite element simulations, which consider different delamination locations, lengths and through-thickness locations. Experimental case studies are carried out to further validate and demonstrate the capability of the proposed method. The results show that the proposed method is able to accurately detect and locate the delamination in the laminated composite beams using the higher harmonic guided waves. One of the advantages of the proposed method is that it does not rely on baseline data to detect and locate the delamination, and hence, it has less influence by varying operational and environmental conditions.