Fe Modeling of Lamb Waves Propagation and Diffraction in Viscoelastic Composite Material Plate
作者:
Bernard Hosten,
Michel Castaings,
期刊:
AIP Conference Proceedings
(AIP Available online 1904)
卷期:
Volume 700,
issue 1
页码: 230-237
ISSN:0094-243X
年代: 1904
DOI:10.1063/1.1711629
出版商: AIP
数据来源: AIP
摘要:
A Finite Element code is used in a stationary mode to compute, at single a frequency, the stress and displacement fields in a plate made of anisotropic viscoelastic materials. An appropriated spatial load at one boundary of the plate is applied to generate a guided Lamb wave mode. The number of frequency iterations (≈ usually less than 30) is limited by the frequency content of the excitation. Then, the temporal response at any node of the plate can be reconstructed with inverse FFT. The velocity, attenuation and nature of one or several propagating modes can be identified in the classical frequency/wave number representation. This paper shows the effect of the attenuation on the propagation of Lamb waves in a cross‐ply, carbon‐epoxy material plate. Focus is made on some limitations that the attenuation causes on the detection of a delamination between plies. © 2004 American Institute of Physics
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