Delamination Localization in Sandwich Skin Using Lamb Waves by Finite Element Method

Q2 Physics and Astronomy

Advances in Acoustics and Vibration Pub Date : 2018-11-28 DOI:10.1155/2018/9705407

Salah Nissabouri, M. Allami, E. Boutyour, A. Errkik

引用次数: 3

Abstract

In this work we model by finite element method (FEM) the Lamb waves’ propagation and their interactions with symmetric and asymmetric delamination in sandwich skin. The simulations were carried out using ABAQUS CAE by exciting the fundamental A0 Lamb mode in the frequency 300 kHz. The delamination was then estimated by analysing the signal picked up at two sensors using two technics: Two-Dimensional Fast Fourier Transform (2D-FFT) to identify the propagating and converted modes, and wavelet transform (WT) to measure the arrival times. The results showed that the mode A0 is sensible to symmetric and asymmetric delamination. Besides, based on signal changes with the delamination edges, a localization method is proposed to estimate the position and the length of the delamination. In the last section an experimental FEM verification is provided to validate the proposed method.

查看原文本刊更多论文

基于Lamb波的三明治皮分层定位有限元方法

本文采用有限元方法模拟了夹层中对称和不对称分层时兰姆波的传播及其相互作用。利用ABAQUS CAE软件，在300 kHz的频率上激发基本的A0 Lamb模，进行了仿真。然后通过使用两种技术分析两个传感器拾取的信号来估计分层:二维快速傅里叶变换(2D-FFT)识别传播和转换模式，小波变换(WT)测量到达时间。结果表明，A0模式对对称分层和不对称分层都很敏感。此外，基于信号随分层边缘的变化，提出了一种估计分层位置和长度的定位方法。最后通过有限元实验验证了所提方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Advances in Acoustics and Vibration ACOUSTICS-

自引率

0.00%

发文量

期刊介绍： The aim of Advances in Acoustics and Vibration is to act as a platform for dissemination of innovative and original research and development work in the area of acoustics and vibration. The target audience of the journal comprises both researchers and practitioners. Articles with innovative works of theoretical and/or experimental nature with research and/or application focus can be considered for publication in the journal. Articles submitted for publication in Advances in Acoustics and Vibration must neither have been published previously nor be under consideration elsewhere. Subject areas include (but are not limited to): Active, semi-active, passive and combined active-passive noise and vibration control Acoustic signal processing Aero-acoustics and aviation noise Architectural acoustics Audio acoustics, mechanisms of human hearing, musical acoustics Community and environmental acoustics and vibration Computational acoustics, numerical techniques Condition monitoring, health diagnostics, vibration testing, non-destructive testing Human response to sound and vibration, Occupational noise exposure and control Industrial, machinery, transportation noise and vibration Low, mid, and high frequency noise and vibration Materials for noise and vibration control Measurement and actuation techniques, sensors, actuators Modal analysis, statistical energy analysis, wavelet analysis, inverse methods Non-linear acoustics and vibration Sound and vibration sources, source localisation, sound propagation Underwater and ship acoustics Vibro-acoustics and shock.