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| Content Provider | Springer Nature Link |
|---|---|
| Author | Chennamsetti, Ramadas Khan, Irfan Hood, Avinash Joshi, Makarand |
| Copyright Year | 2013 |
| Abstract | Misalignments are a major concern, when air-coupled ultrasonic probes are deployed for transmission and reception of Lamb waves. Misalignments between the air-coupled probes result in reduction in amplitude and change in arrival time of the Lamb waves. This reduction in amplitude can give a false alarm in Non-destructive Testing (NDT) applications, if amplitude is the criterion for flaw or damage detection. In the present work, one of the probe’s (transmitter or receiver) position was kept fixed, and the other probe was rotated to introduce a misalignment termed ‘rotational misalignment’. This rotation had violated the co-planarity condition, resulting in reduction in amplitude of the received fundamental anti-symmetric mode (A$_{o}$) in an isotropic material plate. Interestingly, variation in amplitude of the Ao mode with the rotational misalignment angle revealed that, at certain angular locations, there exists a local maximum and local minimum resembling sync function. Subsequently, the angular location of occurrence of these is attributed to dispersion characteristics of the A$_{o}$ mode. |
| Starting Page | 2209 |
| Ending Page | 2212 |
| Page Count | 4 |
| File Format | |
| ISSN | 22347593 |
| Journal | International Journal of Precision Engineering and Manufacturing |
| Volume Number | 14 |
| Issue Number | 12 |
| e-ISSN | 20054602 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2013-12-04 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Air-coupled probe Rotational misalignment A$_{ o }$ mode Industrial and Production Engineering Materials Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Industrial and Manufacturing Engineering Mechanical Engineering Electrical and Electronic Engineering |
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