The anisotropic propagation of ultrasonic guided waves in composite materials and implications for practical applications

被引：43

作者：

Putkis, O. ^{[1
,2
]}

Dalton, R. P. ^{[2
]}

Croxford, A. J. ^{[1
]}

机构：

[1] Univ Bristol, Ultrason & NDT Grp, Bristol BS8 1TR, Avon, England

[2] QinetiQ Plc, Farnborough GU14 0LX, Hants, England

来源：

ULTRASONICS | 2016年 / 65卷

基金：

英国工程与自然科学研究理事会;

关键词：

Ultrasonic guided waves; Anisotropic materials; Energy velocity; Minimum resolvable distance; Energy focusing factor; LONG-RANGE INSPECTION; MULTILAYERED MEDIA; LAMB WAVES; DISPERSION; VELOCITY; PLATES;

D O I：

10.1016/j.ultras.2014.11.013

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Ultrasonic guided wave propagation in anisotropic attenuative materials like CFRP (carbon fibre reinforced polymer) is much more complicated than in isotropic materials. Propagation phenomena need to be understood and quantified before reliable NDE (Non-destructive Evaluation)/SHM (Structural Health Monitoring) inspection systems can be realized. The propagation characteristics: energy velocity, dispersion, mode coupling, energy focusing factor and attenuation are considered in this paper. Concepts of minimum resolvable distance and sensitivity maps are extended to anisotropic attenuative materials in order to provide the means for comparison of different guided wave modes in composite materials. The paper is intended to serve as a framework for evaluating and comparing different modes and choosing the optimum operating conditions (frequency, sensor layout) for possible NDE/SHM applications on composite materials. Fundamental guided wave modes in the low frequency regime for highly anisotropic CFRP plates are investigated experimentally and theoretically and the implications for NDE/SHM are discussed. (C) 2015 The Authors. Published by Elsevier B.V. All rights reserved.

引用

页码：390 / 399

页数：10

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