Non-destructive testing of large area aluminum plate using stroboscopic shearography

Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

WMECH04_095

تاریخ نمایه سازی: 11 خرداد 1397

Abstract:

Shearography is an approved and powerful tool that is suitable for nondestructive inspection. In this paper,stroboscopic shearography and PZT excitation network are proposed for nondestructive evaluation of a large area object.For this purpose, a bi-concave lens was embedded in the front of Michelson interferometer to overcome the limitation ofthe Michelson angle of view. Vibration loading is the most appropriate stressing method where an in-situ inspection fora large structure is required. A thin, light PZT patch was attached to the back side of the aluminum specimen to generatevibration in the structure. The attached PZT patch was excited with various frequencies using a function generator anda voltage amplifier. The experiment was successfully carried out on a large area aluminum plate including a large wallthinning.The anomaly in the shearography fringe pattern reveals and localizes the wall-thinning over a wide vibrationfrequency range.

Authors

H Asemani

PhD student, Intelligence Based Experimental Mechanics Center, Department of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran.

N Soltani

Professor, Intelligence Based Experimental Mechanics Center, School of Mechanical Engineering, College of Engineering,University of Tehran, Tehran, Iran

A Shivaei Kojouri

M.Sc. student, Intelligence Based Experimental Mechanics Center, School of Mechanical Engineering, College ofEngineering, University of Tehran, Tehran, Iran