Axial stress measurement for tightened bolt based on the effect of stress on ultrasonic wave attenuation

Fu, Tao; Chen, Ping; Yin, Aijun; Peng, Xianmin

doi:10.1080/10589759.2023.2182882

Cited by 9 publications

(1 citation statement)

References 33 publications

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“…Recently, Fu et al [23,24] proposed the use of an energy attenuation coefficient to measure axial stress in bolts. The method selects a sensitive frequency band with a small range from the effective bandwidth of the ultrasonic echo signal, uses this band to calculate the energy attenuation coefficient and then establishes the relationship between the energy attenuation coefficient and the stress.…”

Section: Introductionmentioning

confidence: 99%

Measurement of axial stress in high-strength short bolts using ultrasonic attenuation

Chen

Peng

et al. 2023

Meas. Sci. Technol.

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Based on the scattering attenuation theory of loaded polycrystalline metals, a bolt axial stress measurement method using ultrasonic echo attenuation is proposed for the problem that the conventional TOF method is difficult to measure the stress of high-strength short bolts. Firstly, the attenuation coefficients of body-centered cubic crystalline materials in the Rayleigh scattering range are described, and the mathematical model between the ratio of the peak of the two bottom echoes and the axial stress of the bolt is further derived. Then, the effects of the transducer wafer diameter, mounting eccentricity and bolt thread on the ultrasonic signal were analyzed by finite element simulation, to provide a strategy for transducer selection and mounting. In addition, a magnetic ring clamping device was designed to ensure a tight fit between the transducer and the bolt, and to improve the alignment of both. Finally, a bolt axial stress ultrasonic measurement system was built, and a comparison experiment between TOF method and attenuation method was conducted to predict the axial stress of bolts. The experimental results shown that the average relative measurement error of the attenuation method proposed in this paper is 4.42%~5.76% lower than that of the conventional TOF method, which is more suitable for measuring the axial stress of bolts.

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Section: Introductionmentioning

confidence: 99%