Inspection of the residual stress on welds using laser ultrasonic supported with finite element analysis

Ume, I. Charles; Zhou, Yuanlai; Reddy, Vishnu V. B.

doi:10.1051/mfreview/2019001

Cited by 4 publications

(4 citation statements)

References 28 publications

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“…The experimental results were similar to those obtained using the X-ray method, demonstrating the high precision and accuracy of the laser ultrasonic detection method in measuring stress. Ye et al [18] proposed a method for measuring residual stress on the surface/subsurface of welded components. Pan et al [19] explored the significant quantitative relationship between laser ultrasonic velocity and residual stress in high-temperature alloys and verified the method using X-ray detection results, realizing the quantitative detection of alloy stress.…”

Section: Introductionmentioning

confidence: 99%

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

Tian,

Kong,

Liu

et al. 2024

Buildings

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Accurate measurement of the stress in steel structures is crucial for structural health monitoring. To achieve this goal, a novel technique, the laser ultrasonic technique, was used in absolute stress measurement in this study. The feasibility of this technique has been verified through theoretical analysis and finite element (FE) analysis. A stress measurement experiment in steel specimens was conducted and the relationship between ultrasonic relative wave velocity and stress was explored. The results revealed that there is a similar linear correlation between the ultrasonic relative wave velocity and absolute stress. The stress can be obtained based on ultrasonic relative wave velocity. According to the stress measurement results, it was found that the absolute error between the measured stress and theoretical stress was largest when the stress level was low, and that the measured error of stress gradually decreased with increases in the applied stress. The relative error between the measured stress and the theoretical stress was within 10% when the stress was higher than 100 MPa. This further verifies the reliability of the laser ultrasonic technique under high-stress conditions. Additionally, the impact of temperature and surface roughness on stress measurement was analyzed. The stress error in stress measurement increased similarly linearly with the increase in temperature and increased non-linearly with the increase in roughness. The corresponding compensation methods were proposed to effectively improve the accuracy of measurement.

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Section: Introductionmentioning

confidence: 99%

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

Tian,

Kong,

Liu

et al. 2024

Buildings

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“…However, the conventional contact ultrasonic method is not suitable for the in-service monitoring of pillar porcelain insulators, due to the high voltage induced damage to the electrical instrument. The laser ultrasonic testing method is a potential method for the load monitoring with the advantage of noncontact and remote stimulation and picking ultrasound [15][16][17][18][19][20]. Laser ultrasonic testing allows rapid scanning of the metal material to obtain the residual stress distribution on the two-dimensional plane.…”

Section: Introductionmentioning

confidence: 99%

“…Laser ultrasonic testing allows rapid scanning of the metal material to obtain the residual stress distribution on the two-dimensional plane. Ye et al [20] used the surface wave coupled with laser-electromagnetic ultrasonic technology to study the surface/subsurface longitudinal residual stress distribution generated by gas metal arc welding. Duquennoy et al [6] used laser ultrasound to study the residual stress of Q235 bars, the results showed that the residual stress value has a strong influence on the surface wave velocity.…”

Section: Introductionmentioning

confidence: 99%

A laser-induced dual ultrasonic wave method for noncontact load monitoring of pillar porcelain insulators

Zhao

Qian²,

Ye³

et al. 2022

Meas. Sci. Technol.

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In this paper, a noncontact load monitoring method based on laser-induced synchronous ultrasonic surface wave and air wave is presented to improve the accuracy of load measurement on pillar porcelain insulator. In order to eliminate the measurement error caused by insulator deformation, a correction algorithm for surface wave velocity calculation is established by introducing the air wave propagation time. An experimental setup of the load measurement system for pillar porcelain insulators based on laser-induced dual ultrasonic waves was assembled. A load calibration experiment and load detection experiment were carried out under various bending and torsional loads. The results showed that the proposed method is effective to solve the problem of the surface wave propagation time changing abruptly, greatly increasing the accuracy of load measurement. In the monitoring experiments, the relative error between the calculated load value and the actual applied load value was small, the average measurement error of the bending load was 16.20%, and the average measurement error of the torsional load was 11.38%. This proved that the measurement of the insulator load value using a laser ultrasonic surface wave is more precise than the traditional methods, making it more suitable for engineering inspection.

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“…Methods for studying the state of a material are effective, in which measurements of the velocity of SAW are used [6,7,11,16,19,23]. The velocity of SAW depends on the elastic characteristics of the material and its density and is sensitive to the occurrence of plastic deformation [18], as well as mechanical stresses [2,13,14] in the material.…”

Section: Introductionmentioning

confidence: 99%

The use of surface acoustic waves to evaluate of the near-surface layers of metal processed shot peening

Skal’s’kyi¹,

Студент²,

Mokryy³

et al. 2021

Diagnostyka

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The surface layers of low-carbon steel metal subjected to shot peening were studied. The velocity of Rayleigh surface waves of various frequencies in the range of 3-9 MHz by the phase-pulse method using contact piezoelectric transducers measured. The study of the distribution of residual mechanical stresses in depth was carried out using the etching of the surface layer of the metal and the use of a strain gauges. The characteristics of the roughness of the surface layer of the metal, which has arisen as a result of shot peening, have been determined.The effect of roughness and plastically deformed layer on the velocity of surface acoustic waves (SAW) is estimated by the method of layer-by-layer grinding of the surface layers of the metal.Based on the determination of the magnitude of the residual mechanical stresses and the known acoustoelastic coefficients, the magnitude of the change in the velocity of SAW under the action of these stresses is estimated.

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Inspection of the residual stress on welds using laser ultrasonic supported with finite element analysis

Cited by 4 publications

References 28 publications

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

A laser-induced dual ultrasonic wave method for noncontact load monitoring of pillar porcelain insulators

The use of surface acoustic waves to evaluate of the near-surface layers of metal processed shot peening

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