|Table of Contents|

Study of Laser-generated Transient Lamb Wave by Experiment and Numerical Simulation(PDF)


Research Field:
Publishing date:


Study of Laser-generated Transient Lamb Wave by Experiment and Numerical Simulation
NiXiaowu ChenXiao XuBoqiang XuRongqing ShenZhonghua LuJian
School of Sciences,NUST,Nanjing 210094
Lamb w ave opt ical deflection method f inite element method ablat ion model
In order to study the generat ion and propagation characteristics of laser-generated Lamb wave in a solid plate, this paper presents the fiber-coupled optical deflect ion method to detect and to further discuss the detection principle in detail. Besides, based on the ablation model, the development of t ransient Lamb is simulated by the f inite element method. The result s of the numerical simulat ion are in good agreement w ith laser Lamb w aveforms detected in experiment. This detection technique has a great potent ial in laser ult rasonic.


1  袁易全, 陈思忠. 近代超声原理与应用[ M] . 南京: 南京大学出版社, 1996.
2  Rose L R F. Point-source representation for laser- g enerated ultr asound[ J] . J Acous Soc Am,1984, 75 ( 3) : 723~ 732.
3  Zhang X R, Zhang W, Wang X D, et al. Laser ultr asound char acterization o f chemically prepared nano- structured silver [ J] . Appl Phys A, 2000, 70: 573~ 580.
4  Aussel J D, Brun A L, Baboux J C. Gener ating acoustic waves by laser: Theoretical and experimental study of the emission source[ J] . Ultrasonics, 1988, 26: 245~ 255.
5  Farson D F, Kim K R. Generation of optical and acoustic emission in laser weld plumes[ J] . J Appl Phys, 1999, 85( 3) : 1 329~ 1 338.
6  Lu J, Hou R, Chen J P, et al. A new detection technique for laser- generated Rayleig h wave pulses[ J] . Opt Comm, 2001, 195: 221~ 224.
7  Dewhurst R J, Edw ards C E, Mckie A D W, et al. Estimate of the thickness o f thin metal sheet using laser generated ultr asound[ J] . Appl Phys Lett, 1987, 51: 1 066~ 1 071.
8  Weaver R M, Pao Y H. Ax isymmetric elastic w av e excited by a point source in a plate[ J] . J Appl Mech, 1982, 49: 821~ 825.


Last Update: 2013-03-17