Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type Transducer
The ultrasonic nonlinearity parameter is used to evaluate the nonlinear elasticity of a material, which is determined from the displacement amplitude of the fundamental and second-order frequencies components in an ultrasonic wave propagating through a material. However, the displacement amplitude o...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/23/8661 |
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| author | Jongbeom Kim Hong-Pil Ha Kyung-Mo Kim Kyung-Young Jhang |
| author_facet | Jongbeom Kim Hong-Pil Ha Kyung-Mo Kim Kyung-Young Jhang |
| author_sort | Jongbeom Kim |
| collection | DOAJ |
| description | The ultrasonic nonlinearity parameter is used to evaluate the nonlinear elasticity of a material, which is determined from the displacement amplitude of the fundamental and second-order frequencies components in an ultrasonic wave propagating through a material. However, the displacement amplitude of the second-order harmonic component generated during propagation through a material is very weak because it is easily affected by measurement conditions such as surface roughness. In this study, we analyzed the influence of surface roughness on the measurement of the ultrasonic nonlinearity parameter. For this purpose, Al6061-T6 and SUS304 specimens were prepared with different surface roughness ranging from 0.5 to 2.9 μm. Then, the absolute and relative ultrasonic nonlinearity parameter measurements were conducted using a through-transmission technique involving two cases: both surfaces being rough, and one being a rough surface and the other being a smooth surface. The experimental results showed that the surface roughness had a lesser influence on the absolute measurement than on the relative measurement and that the transmission surface was less affected by the reception surface. These results were similar regardless of the types of specimens. Therefore, to perform accurate measurements, it is desirable to measure the nonlinearity parameter after polishing the material surface. |
| first_indexed | 2024-03-10T14:20:33Z |
| format | Article |
| id | doaj.art-7c285e75f133423eabaa9ef6a140a8e8 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:20:33Z |
| publishDate | 2020-12-01 |
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| series | Applied Sciences |
| spelling | doaj.art-7c285e75f133423eabaa9ef6a140a8e82023-11-20T23:24:47ZengMDPI AGApplied Sciences2076-34172020-12-011023866110.3390/app10238661Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type TransducerJongbeom Kim0Hong-Pil Ha1Kyung-Mo Kim2Kyung-Young Jhang3Korea Atomic Energy Research Institute, Daejeon 34057, KoreaKorea Aerospace Industries, Ltd., Sacheon-si 52529, KoreaKorea Atomic Energy Research Institute, Daejeon 34057, KoreaSchool of Mechanical Engineering, Hanyang University, Seoul 04763, KoreaThe ultrasonic nonlinearity parameter is used to evaluate the nonlinear elasticity of a material, which is determined from the displacement amplitude of the fundamental and second-order frequencies components in an ultrasonic wave propagating through a material. However, the displacement amplitude of the second-order harmonic component generated during propagation through a material is very weak because it is easily affected by measurement conditions such as surface roughness. In this study, we analyzed the influence of surface roughness on the measurement of the ultrasonic nonlinearity parameter. For this purpose, Al6061-T6 and SUS304 specimens were prepared with different surface roughness ranging from 0.5 to 2.9 μm. Then, the absolute and relative ultrasonic nonlinearity parameter measurements were conducted using a through-transmission technique involving two cases: both surfaces being rough, and one being a rough surface and the other being a smooth surface. The experimental results showed that the surface roughness had a lesser influence on the absolute measurement than on the relative measurement and that the transmission surface was less affected by the reception surface. These results were similar regardless of the types of specimens. Therefore, to perform accurate measurements, it is desirable to measure the nonlinearity parameter after polishing the material surface.https://www.mdpi.com/2076-3417/10/23/8661surface roughnessultrasonic nonlinearity parameterabsolute nonlinear measurementrelative nonlinear measurement |
| spellingShingle | Jongbeom Kim Hong-Pil Ha Kyung-Mo Kim Kyung-Young Jhang Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type Transducer Applied Sciences surface roughness ultrasonic nonlinearity parameter absolute nonlinear measurement relative nonlinear measurement |
| title | Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type Transducer |
| title_full | Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type Transducer |
| title_fullStr | Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type Transducer |
| title_full_unstemmed | Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type Transducer |
| title_short | Analysis of the Influence of Surface Roughness on Measurement of Ultrasonic Nonlinearity Parameter Using Contact-Type Transducer |
| title_sort | analysis of the influence of surface roughness on measurement of ultrasonic nonlinearity parameter using contact type transducer |
| topic | surface roughness ultrasonic nonlinearity parameter absolute nonlinear measurement relative nonlinear measurement |
| url | https://www.mdpi.com/2076-3417/10/23/8661 |
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