0
Research Papers

Scattering of S0 and A0 Lamb Modes in a Plate With Multiple Damage

[+] Author and Article Information
Deng Qing-tian

 School of Science, Chang’an University, Xi’an, China, 710064deng_qingtian@yahoo.com.cn

Yang Zhi-chun

 School of Aeronautics, Northwestern Polytechnical University, Xi’an, China, 710072yangzc@nwpu.edu.cn

J. Vib. Acoust 134(1), 011004 (Dec 22, 2011) (9 pages) doi:10.1115/1.4005024 History: Received September 05, 2010; Revised July 25, 2011; Published December 22, 2011; Online December 22, 2011

A study of scattering characteristics of S0 and A0 Lamb modes in an infinite isotropic plate with multiple damage is presented in this paper. Both plate theory and the wave function expansion method are utilized to derive the scattered wave field of a single damage. By using the addition theorems of Bessel functions, a complex scattering wave field of multiple damage is investigated. Measurements agreed well between theoretical results and FE simulations. Numerical results of a plate with two damage are graphically presented by considering S0 and A0 modes as an incoming Lamb wave. Effects of geometric properties of damage on the scattering wave field are discussed.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 3

Sketch of a plate with multiple circular damage

Grahic Jump Location
Figure 2

Sketch of a plate with an interior circular damage

Grahic Jump Location
Figure 1

Phase velocity dispersive curves for two fundamental Lamb modes in a steel plate

Grahic Jump Location
Figure 7

Scattered amplitudes of displacement uz by a ∅20 mm (a/h = 0.4) blind circular damage measured on a radius r1  =  50 mm (r1 /h = 2) from the center of damage 1 compared to theoretical analysis results with two different radiuses of damage 2

Grahic Jump Location
Figure 8

Scattered displacement amplitudes around damage 1 (damage 1: a/h=0.4; damage 2: a/h=0.6)

Grahic Jump Location
Figure 9

Scattered displacement amplitudes around damage 1 (damage 1: a/h=0.4; damage 2: a/h=1.2)

Grahic Jump Location
Figure 11

Scattered displacement amplitudes around damage 1 (damage 1: a/h=0.6; damage 2: a/h=1.2)

Grahic Jump Location
Figure 4

Schematic of the three-dimensional model for finite element simulation. Figure 4 Excitation of S0 Lamb wave; 4 Excitation of A0 Lamb wave.

Grahic Jump Location
Figure 5

Five-cycle Hanning window-modulated sinusoid tonebursts in a time domain

Grahic Jump Location
Figure 6

Configuration of a plate and locations of damage

Grahic Jump Location
Figure 10

Scattered displacement amplitudes around damage 1 (damage 1: a/h=0.6; damage 2: a/h=0.4)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In