The Wavefield of an Ultrasonic Angle Beam Shear Wave Transducer: An Elastodynamic Approach

Lerch, Terence P.; Schmerr, Lester W.; Sedov, Alexander

doi:10.1007/978-1-4615-5947-4_115

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Generally, a contact-type transducer array is considered to primarily generate compressional waves (p-waves) in an inspection medium. [9] Therefore, the beam steering and focusing technology of p-waves for a linear phased array were deeply studied by many investigators with an assumption of fluid mediums. [10][11][12][13][14][15] However, a linear phased array using pwaves suffers a limitation from the steering angle, due to its poor performance at a higher steering angle.…”

Section: Introductionmentioning

confidence: 99%

“…In most previous works, the SV waves directly generated by transducer array are always neglected, due to the traditional opinion that the conventional transducer array primarily generates p-waves. [9] In addition, the assumption of the fluid medium in the classical modelling approach of the field excited by the arrays also makes the SV waves neglected. [10][11][12][13][14][15] However, a number of recent studies illustrate the unique excitation and propagation mechanism of SV waves, which makes it possible to achieve beam focusing of SV waves with a contact-type transducer array.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrasonic beam focusing characteristics of shear-vertical waves for contact-type linear phased array in solid*

Dai¹,

Yan²,

Zhang³

2020

Chinese Phys. B

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We investigate the beam focusing technology of shear-vertical (SV) waves for a contact-type linear phased array to overcome the shortcomings of conventional wedge transducer arrays. The numerical simulation reveals the transient excitation and propagation characteristics of SV waves. It is found that the element size plays an important role in determining the transient radiation directivity of SV waves. The transient beam focusing characteristics of SV waves for various array parameters are deeply studied. It is particularly interesting to see that smaller element width will provide the focused beam of SV waves with higher quality, while larger element width may result in erratic fluctuation of focusing energy around the focal point. There exists a specific range of inter-element spacing for optimum focusing performance. Moreover, good beam focusing performance of SV waves can be achieved only at high steering angles.

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