Article

Journal of Mechanical Science and Technology

, Volume 27, Issue 11, pp 3207-3214

First online:

Numerical simulation of ultrasonic minimum reflection for residual stress evaluation in 2D case

  • Maodan YuanAffiliated withSchool of Mechanical Engineering, Sungkyunkwan University
  • , To KangAffiliated withSchool of Mechanical Engineering, Sungkyunkwan UniversityNuclear Convergence Technology Development Division, Korea Atomic Energy Research Institute (KAERI)
  • , Jianhai ZhangAffiliated withSchool of Mechanical Engineering, Sungkyunkwan University
  • , Sung-Jin SongAffiliated withSchool of Mechanical Engineering, Sungkyunkwan University Email author 
  • , Hak-Joon KimAffiliated withSchool of Mechanical Engineering, Sungkyunkwan University

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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.

Keywords

Rayleigh angle Schoch effect Minimum reflection profile Material damping Residual stress