Volume 17, Issue 11 (1-2018)                   Modares Mechanical Engineering 2018, 17(11): 239-246 | Back to browse issues page

‎ 20.1001.1.10275940.1396.17.11.36.6

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Hosseinzadeh E, Sodagar S. Evaluation of embedded adjacent cylinders in elastic matrix using short-pulse MIIR technique. Modares Mechanical Engineering 2018; 17 (11) :239-246
URL: http://mme.modares.ac.ir/article-15-7896-en.html
Evaluation of embedded adjacent cylinders in elastic matrix using short-pulse MIIR technique
Ehsan Hosseinzadeh1 , Sina Sodagar * 2
1- Department of Mechanical Engineering, Petroleum University of Technology
2- Assistant Professor, Department of Mechanical Engineering, Petroleum University of Technology
Abstract:   (4816 Views)
In this paper, evaluation of cylindrical targets embedded in an elastic matrix is studied using resonance scattering theory (RST). For this purpose, the finite element simulation of ultrasonic wave scattering from the embedded cylinders propagated in elastic matrix is used for resonance ultrasonic spectroscopy (RUS). To involve the frequency effects of measurement system, the modified short-pulse method of isolation and identification of resonances (MIIR) is employed to calculate the resonance modes and frequencies of the elastic target. To examine the validity of the proposed method the backscattered resonance spectrum for an embedded steel cylinder in an epoxy matrix is calculated and the numerical results are compared with the experimental and mathematical results. The FE-based resonance ultrasonic spectroscopy method is employed to investigate the behavior of far field backscattered resonance frequency spectrum for two embedded adjacent elastic cylinders. Using the proposed method to calculate the backscattered resonance spectrum from two embedded adjacent cylinders, it was shown that changing the center-to-center distance of adjacent cylindrical targets shifts the n=4 resonance frequency and changing the receiver position affect the n=3 and n=4 resonant mode frequencies.
Keywords: Ultrasonic wave, embedded elastic cylinders, resonance ultrasonic spectroscopy
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Received: 2017/08/18 | Accepted: 2017/09/24 | Published: 2017/11/18
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