Reflection analysis for Stoneley waves encountering interfacial delamination
| Autor: | Zhi-yuan Zhang, Guang-yuan Gao, Bing Li, Ming-hang Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Delamination 02 engineering and technology Radius 021001 nanoscience & nanotechnology Interference (wave propagation) Computer Science::Numerical Analysis Physics::Geophysics Mathematics::Numerical Analysis Wavelength 020303 mechanical engineering & transports 0203 mechanical engineering Nondestructive testing Ceramics and Composites Reflection (physics) Stoneley wave Reflection coefficient Composite material 0210 nano-technology business Civil and Structural Engineering |
| Zdroj: | Composite Structures. 253:112771 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2020.112771 |
| Popis: | Stoneley wave is a kind of ultrasonic guided wave propagating along a solid-solid bonded interface with two different materials. In this paper, the influence of interfacial delamination size on the reflection coefficient of Stoneley waves in a double-layered medium is investigated. According to the energy distribution of Stoneley waves, an appropriate integral region is selected, and the reflection coefficient of Stoneley waves encountering delamination is derived via reciprocity theorem. An example of delamination composed of two arcs is introduced. The effects of delamination radius, delamination width and Stoneley wave wavelength on the reflection coefficient are discussed. It is observed that the reflection coefficient decreases and gradually stabilizes as the delamination radius increases. Meanwhile, the variation of reflection coefficient with the ratio of the delamination width to the Stoneley wave wavelength is half-sine and this can be interpreted by the interference principle. Finally, some experimental validations are carried out on an aluminum-steel plate. The delamination location is tested by pulse-echo approach and the half-sine variation of the reflection coefficient with the ratio of the delamination width to the Stoneley wave wavelength is measured. The variation of reflection coefficient provides a reference for the measurement of the interfacial delamination size in nondestructive testing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect