Computational mechanics and optimization-based prediction of grain orientation in anisotropic media using ultrasonic response
| Autor: | Jonghwan Suhr, Kyongmo Kim, Myung-Won Suh, Munsung Kim, To Kang, Sung-Jin Song, Seong-In Moon |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Optimization
Materials science 020209 energy Acoustics Physics::Medical Physics 02 engineering and technology 030218 nuclear medicine & medical imaging 03 medical and health sciences Ultrasonic wave 0302 clinical medicine Transverse isotropy Distortion Nondestructive testing Computational mechanics 0202 electrical engineering electronic engineering information engineering Dissimilar metal welds Anisotropy Piping business.industry TK9001-9401 Physics::Classical Physics Pressure vessel Grain orientation Nuclear Energy and Engineering Nuclear engineering. Atomic power Ultrasonic sensor business |
| Zdroj: | Nuclear Engineering and Technology, Vol 53, Iss 6, Pp 1846-1857 (2021) |
| ISSN: | 1738-5733 |
| Popis: | Ultrasonic nondestructive testing is important for monitoring the structural integrity of dissimilar metal welds (DMWs) in pressure vessels and piping in nuclear power plants. However, there is a low probability of crack detection via inspection of DMWs using ultrasonic waves because the grain structures (grain orientations) of the weld area cause distortion and splitting of ultrasonic beams propagating in anisotropic media. To overcome this issue, the grain orientation should be known, and a precise ultrasonic wave simulation technique in anisotropic media is required to model the distortion and splitting of the waves accurately. In this study, a method for nondestructive prediction of the DMW grain orientations is presented for accurate simulation of ultrasonic wave propagation behavior in the weld area. The ultrasonic wave propagation behavior in anisotropic media is simulated via finite-element analysis when ultrasonic waves propagate in a transversely isotropic material. In addition, a methodology to predict the DMW grain orientation is proposed that employs a simulation technique for ultrasonic wave propagation behavior calculation and an optimization technique. The simulated ultrasonic wave behaviors with the grain orientations predicted via the proposed method demonstrate its usefulness. Moreover, the method can be used to determine the focal law in DMWs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|