Abstract
A number of interesting phenomena at fluid-solid interfaces can be observed when the incident angle approaches the Rayleigh angle, including Schoch displacement and leaky Rayleigh waves. Besides the experimental and theoretical research on these problems, numerical tools have been more and more widely used for these complex problems. Based on previous experimental and numerical researches, a 2D finite element model has been built to reproduce the Schoch effects. With the same model, the minimum reflection profile is investigated for the feasibility of material characterization, especially for residual stress evaluation. Residual stress is one of the important properties for structures, and its measurement is a popular research topic in nondestructive evaluation. However, it is not possible to put the residual stress into the numerical model directly. According to the relation of residual stress with mechanical properties, the material damping and wave speed have been alternatively adopted in this work. The influence of minimum reflection profile by residual stress has been shown by the change of wave speed and damping factor. Simulation results show that the minimum reflection profile is a potential method for residual stress evaluation.
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Sung-Jin Song received his B.S. in Mechanical Engineering from Seoul National University, Seoul, Korea in 1981, his M.S. in Mechanical Engineering from Korea Advanced Institute of Science and Technology in 1983, and his Ph.D. in Engineering Mechanics from Iowa State University, Ames, Iowa, USA in 1991. He worked at Daewoo Heavy Industries, Ltd., Incheon, Korea for 5 years from 1983, where he was certified as ASNT Level III in RT, UT, MT and PT. He worked at Chosun University, Gwangju, Korea as Assistant Professor from 1993. Since 1998 he has been at Sungkyunkwan University, Suwon, Korea and is currently Professor of Mechanical Engineering.
Maodan Yuan is a Ph.D. student in Graduate School of Mechanical Engineering from Sungkyunkwan University, Suwon, Korea. His current research interests include nondestructive evaluation for material characterization, numerical simulation for wave propagation, surface wave propagation and nonlinear ultrasonic testing.
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Yuan, M., Kang, T., Zhang, J. et al. Numerical simulation of ultrasonic minimum reflection for residual stress evaluation in 2D case. J Mech Sci Technol 27, 3207–3214 (2013). https://doi.org/10.1007/s12206-013-0843-y
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DOI: https://doi.org/10.1007/s12206-013-0843-y