Comparison of Stroboscopic Shearography and Time-Average Shearography Methods for Nondestructive Testing

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Asemani H.R.; SOLTANI N.

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Journal: Modares Mechanical Engineering Year:2020 | Volume:20 | Issue:4 Page(s): 1089-1098

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Information Journal Paper

Title

Comparison of Stroboscopic Shearography and Time-Average Shearography Methods for Nondestructive Testing

Author(s)

Asemani H.R. | SOLTANI N. | Issue Writer Certificate

Keywords

Nondestructive TestingQ1

Stroboscopic ShearographyQ1

Time-Average ShearographyQ1

Piezoelectric Excitation SystemQ1

Abstract

Shearography is a powerful optics method, which is capable of measuring derivatives of displacement, surface strains, and Nondestructive Testing. Time-Average Shearography and Stroboscopic Shearography have been developed for full-field vibration analysis. In this paper, the capability of Time-Average Shearography and Stroboscopic Shearography for Nondestructive Testing has been compared using a proposed shearography configuration. In order to generate vibration, the proposed experimental system was equipped with a piezoelectric excitation mechanism. The time-average and Stroboscopic Shearography inspections were carried out by sweeping the excitation frequency of the piezoelectric. Stroboscopic Shearography successfully detected the defect in the frequency ranges of 1300-1600, 6000-8000 Hz and 12600-13300 Hz, while Time-Average Shearography detected the defect only in the frequency ranges of 6000-8000 Hz, and 12900-13100 Hz. The results of inspections of propylene specimen with a 10 mm circular hole indicated that Stroboscopic Shearography provides a more reliable assessment than Time-Average Shearography. Compared to Time-Average Shearography, Stroboscopic Shearography gives more clear fringes in the all frequency range. In addition, Stroboscopic Shearography could recognize the defect in wider frequency ranges.

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APA: Copy

Asemani, H.R., & SOLTANI, N.. (2020). Comparison of Stroboscopic Shearography and Time-Average Shearography Methods for Nondestructive Testing. MODARES MECHANICAL ENGINEERING, 20(4 ), 1089-1098. SID. https://sid.ir/paper/179612/en

Vancouver: Copy

Asemani H.R., SOLTANI N.. Comparison of Stroboscopic Shearography and Time-Average Shearography Methods for Nondestructive Testing. MODARES MECHANICAL ENGINEERING[Internet]. 2020;20(4 ):1089-1098. Available from: https://sid.ir/paper/179612/en

IEEE: Copy

H.R. Asemani, and N. SOLTANI, “Comparison of Stroboscopic Shearography and Time-Average Shearography Methods for Nondestructive Testing,” MODARES MECHANICAL ENGINEERING, vol. 20, no. 4 , pp. 1089–1098, 2020, [Online]. Available: https://sid.ir/paper/179612/en

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