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Structural Engineering and Mechanics Volume 91, Number 4, August 2024 , pages 357-368 DOI: https://doi.org/10.12989/sem.2024.91.4.357 |
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Simulation of Rayleigh wave |
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Guadalupe Leon and Hung-Liang (Roger) Chen
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| Abstract | ||
| In this study, a finite-element surface wave simulation using an effective elastic constant (EEC) was developed to calculate the Rayleigh wave velocity change and polarization change in aluminum, steel, and concrete under uniaxial stress. Under stress, an isotropic medium behaves like an anisotropic material during the wave propagation. The EEC is an equivalent anisotropic stiffness matrix which was derived to simulate the acoustoelastic effect using classical finite-element software. The vertical and horizontal surface displacements located 8-mm from a 1-us excitation load were used to find the acoustoelastic coefficients kv and kp and compared to an analytical scheme. It was found that kv for aluminum and concrete matched within 4% of the analytical solution. The finite-element simulation showed that the Rayleigh wave arrival time for concrete and aluminum was greatly influenced by the stress level. Thus, predicting the stress level using concrete and aluminum's acoustoelastic effect is applicable. | ||
| Key Words | ||
| acoustoelastic coefficient; effective elastic constant; finite element; polarization; Rayleigh wave | ||
| Address | ||
| Guadalupe Leon: Department of Engineering and Physics, Doane University, 1014 Boswell Avenue, Crete, NE 68310, USA Hung-Liang (Roger) Chen: Department of Civil and Environmental Engineering, West Virginia University, Morgantown, WV 26506, USA | ||