| DOI | Resolve DOI: https://doi.org/10.1016/j.ndteint.2009.01.012 |
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| Author | Search for: Mabrouki, F.1; Search for: Thomas, Michael; Search for: Genest, M.1; Search for: Fahr, A.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Aerospace Research
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| Format | Text, Article |
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| Subject | closed crack detection; vibrothermography; finite element modeling; frictional heating |
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| Abstract | This paper investigates vibrothermography for the detection of fatigue cracks in steel compact tension specimens using combined experimental and numerical analyses. First, a numerical modal analysis is carried out to predict the optimal excitation parameters. A coupled thermo-mechanical model is then built to simulate the thermographic inspection. The model predicts the detection of cracks as short as 0.1 mm that is also confirmed experimentally using a commercial infrared camera with a maximum error of 2.13% on the temperature distribution. The model reveals that the specimens’ temperature increases at the crack vicinity according to the excitation frequency and is modulated due to the nonlinearity induced by the crack. The model also shows that the stress at the crack tip is lower than the material's yield stress, which makes the test truly non-destructive. |
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| Publication date | 2009-02-13 |
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| Publisher | Elsevier |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | SMPL-2008-0123 |
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| NPARC number | 8929022 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 359f235b-19bc-4f00-a3f1-b5efc2ee321c |
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| Record created | 2009-04-23 |
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| Record modified | 2020-04-16 |
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