A new approach to determine tensile stress states from the parameters of longitudinal waves

Alves, P.R.L.; Cunha-Filho, João Sabino; Farinhas, M.G.

doi:10.1016/j.apm.2020.02.024

Cited by 1 publication

(1 citation statement)

References 29 publications

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“…Ultrasonic testing is a more convenient and efficient technique for residual-stress measurement compared with other non-destructive testing (NDT) methods. Stress measurement based on ultrasonic waves primarily involves the acousto-elastic effect, wherein the velocity of the ultrasonic wave is linearly related to the stress of the material as it propagates through the material [14][15][16]. Studies pertaining to stress measurements using the acousto-elastic effect involves multiple modes of ultrasonic waves, such as conventional bulk, guided, Rayleigh, Lamb, and longitudinal critically refracted waves [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Application of Nonlinear Lamb Wave Mixing Method for Residual Stress Measurement in Metal Plate

Jiao

Gao

et al. 2023

Chin. J. Mech. Eng.

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Harmonic nonlinear ultrasound can offer high sensitivity for residual stress measurements; however, it cannot be used for local stress measurements at a point in space and exhibits nonlinear distortions in the experimental system. This paper presents a feasibility study on the measurement of residual stress in a metal plate using a nonlinear Lamb wave-mixing technique. The resonant conditions for two Lamb waves to generate a mixing frequency wave are obtained via theoretical analysis. Finite element simulations are performed to investigate the nonlinear interactions between the two Lamb waves. Results show that two incident A0 waves interact in regions of material nonlinearity and generate a rightward S0 wave at the sum frequency. Residual stress measurement experiments are conducted on steel plate specimens using the collinear Lamb wave-mixing technique. By setting different delays for two transmitters, the generated sum-frequency component at different spatial locations is measured. Experimental results show that the spatial distribution of the amplitude of the sum-frequency component agrees well with the spatial distribution of the residual stress measured using X-rays. The proposed collinear Lamb wave-mixing method is effective for measuring the distribution of residual stress in metal plates.

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