Detection of subharmonics in ultrasonic inspection of contact surfaces under compression
| Autor: | Keiichi Naitou, Kenji Kurihara, Toshihiko Sugiura |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Subharmonic
Materials science business.industry Mechanical Engineering Acoustics Ultrasonic testing Condensed Matter Physics Compression (physics) Sizing Electronic Optical and Magnetic Materials Nonlinear system Contact surfaces Mechanics of Materials Nondestructive testing Surface roughness Electrical and Electronic Engineering business |
| Zdroj: | International Journal of Applied Electromagnetics and Mechanics. 39:237-243 |
| ISSN: | 1875-8800 1383-5416 |
| Popis: | Detection and sizing of a closed crack in structures are difficult by conventional ultrasonic testing. One of promising alternative methods is nonlinear ultrasonic testing which detects subharmonic responses from a closed crack. This study investigates generation of subharmonics at contact surfaces of two specimens, modeling a closed crack, under ultrasonic radiation. Experiments of ultrasonic inspection were carried out by preparing different kinds of surface roughness of the specimens and also by changing compression force acting on the two contacting specimens. Our experimental results show some subharmonic responses from the contact surfaces, which can be influenced by the contact pressure and the contact surface roughness. |
| Databáze: | OpenAIRE |
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