title: Experimental study and finite element analysis based on equivalent load method for laser ultrasonic measurement of elastic constants.
abstract: The laser ultrasonic generation of Rayleigh surface wave and longitudinal wave in an elastic plate is studied by experiment and finite element method. In order to eliminate the measurement error and the time delay of the experimental system, the linear fitting method of experimental data is applied. The finite element analysis software ABAQUS is used to simulate the propagation of Rayleigh surface wave and longitudinal wave caused by laser excitation on a sheet metal sample surface. The equivalent load method is proposed and applied. The pulsed laser is equivalent to the surface load in time and space domain to meet the Gaussian profile. The relationship between the physical parameters of the laser and the load is established by the correction factor. The numerical solution is in good agreement with the experimental result. The simple and effective numerical and experimental methods for laser ultrasonic measurement of the elastic constants are demonstrated.
authors.affiliation: College of Sciences, Northeastern University, Shenyang 110819, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhan
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials Ministry of Education, Northeastern University, Shenyang 110819, China. Electronic address: csliu@mail.neu.edu.cn.
authors.forename: Changsheng
authors.initials: C
authors.lastname: Liu
authors.affiliation: College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China.
authors.forename: Fengpeng
authors.initials: F
authors.lastname: Zhang
authors.affiliation: College of Sciences, Northeastern University, Shenyang 110819, China.
authors.forename: Zhaoguo
authors.initials: Z
authors.lastname: Qiu
mesh_terms: D003198:Computer Simulation; D055119:Elastic Modulus; D054459:Elasticity Imaging Techniques / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D020342:Finite Element Analysis; D007090:Image Interpretation, Computer-Assisted; D007834:Lasers; D008422:Materials Testing; D008670:Metals / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D061088:Photoacoustic Techniques / Q000379:methods*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity
chemical_list: D008670:Metals
keywords: Elastic constants; Equivalent load method; Laser ultrasonic