Lamb wave generation and reception with time-delay periodic linear arrays: a BEM simulation and experimental study

A time-delay periodic linear array model has been proposed for Lamb wave generation and reception in plates. The unilateral guided wave emitting and receiving have been achieved by applying the interference principle in the array designs. A hybrid BEM technique has been developed and applied to simulate the wave generation procedure with such arrays and to analyze the performance. Experimental results also are presented for two typical time-delay periodic arrays to qualitatively validate the theoretical designs. The effects of the array parameters on the array performance, such as the selectivity of Lamb modes and effectiveness of Lamb wave generation, are investigated through the 2-D phase velocity-frequency spectrum analyses as well as Lamb mode wave structure calculations.

[1]  御子柴宣夫.  B. A. Auld : Acoustic Fields and Waves in Solids, Vol. 1 and 2, John Wiley, New York and London, 1973, 2 vols., 23.5×16cm. , 1974 .

[2]  C. Fortunko,et al.  Nondestructive evaluation of planar defects in plates using low‐frequency shear horizontal waves , 1982 .

[3]  R. B. Thompson,et al.  Absolute Determination of Stress in Textured Materials , 1983 .

[4]  M. Koshiba,et al.  Finite-Element Analysis of Lamb Wave Scattering in an Elastic Plate Waveguide , 1984, IEEE Transactions on Sonics and Ultrasonics.

[5]  W. Sachse,et al.  Analysis of elastic wave signals from an extended source in a plate , 1985 .

[6]  G. Kino.  Acoustic waves : devices, imaging, and analog signal processing , 1987 .

[7]  D. Hutchins,et al.  A laser study of transient Lamb waves in thin materials , 1989 .

[8]  A. Nayfeh,et al.  Ultrasonic reflection and guided waves in fluid-coupled composite laminates , 1990 .

[9]  A. Nayfeh,et al.  Ultrasonic reflection and guided wave propagation in biaxially laminated composite plates , 1990 .

[10]  J. Domínguez,et al.  The time domain boundary element method for elastodynamic problems , 1991 .

[11]  A. H. Shah,et al.  Scattering of lamb waves by a normal rectangular strip weldment , 1991 .

[12]  S. Rokhlin.  Lamb wave interaction with lap-shear adhesive joints : theory and experiment , 1991 .

[13]  A. H. Shah,et al.  Transient response of a laminated composite plate: Results from homogenization and discretization , 1992 .

[14]  S. Lih,et al.  Elastodynamic Response of a Unidirectional Composite Laminate to Concentrated Surface Loads: Part II , 1992 .

[15]  J. Rose,et al.  An Approach to Guided Wave Mode Selection for Inspection of Laminated Plate , 1993 .

[16]  J. Rose,et al.  Excitation of Guided Waves in Generally Anisotropic Layers Using Finite Sources , 1994 .

[17]  L. Felsen,et al.  INTERACTION OF ACOUSTIC BEAMS WITH FLUID-LOADED ELASTIC STRUCTURES , 1994 .

[18]  Joseph L. Rose,et al.  Ultrasonic guided wave inspection concepts for steam generator tubing , 1994 .

[19]  Peter Cawley,et al.  The Long Range Detection of Corrosion in Pipes Using Lamb Waves , 1995 .

[20]  J. Rose,et al.  Ultrasonic Guided Waves For NDE of Adhesively Bonded Structures , 1995 .

[21]  S. Lih,et al.  Ultrasonic Characterization of Defects in Lap Joints , 1995 .

[22]  A. Mckie,et al.  Generation and Detection of Single Mode Lamb Waves Using Laser-Based Ultrasound , 1995 .

[23]  R. Burridge,et al.  A complex-transducer-point model for finite emitting and receiving ultrasonic transducers , 1996 .

[24]  Younho Cho,et al.  A boundary element solution for a mode conversion study on the edge reflection of Lamb waves , 1996 .

[25]  P. Wilcox,et al.  Flexible interdigital PVDF transducers for the generation of Lamb waves in structures , 1997 .

[26]  J. Rose,et al.  A comb transducer model for guided wave NDE , 1998 .