Experimental study on fatigue crack identification of 7075 aluminium alloy plate using combination NEWMS and TRA
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Title |
Experimental study on fatigue crack identification of 7075 aluminium alloy plate using combination NEWMS and TRA
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| Creator |
Gao, G L
Shi, D Q Li, D Y Dong, J W Shi, X D |
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| Subject |
Fatigue crack
Identification Intermodulation Nonlinear elastic wave modulation spectroscopy Time reversal acoustic 7075 Alumnium alloy plate |
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| Description |
377-380
According to nonlinear elastic wave modulation spectroscopy (NEWMS) and time reversal acoustic (TRA), a system is constructed to study the fatigue crack in 7075 aluminium alloy plate. Using different frequency excitation source (<i style="mso-bidi-font-style:normal">f</i><sub>1</sub>=270 kHz and <i style="mso-bidi-font-style:normal">f</i><sub>2</sub>=70 kHz), two types of samples, one is with the crack and the other is without the crack, are comparatively experimented. Intermodulation components (<i style="mso-bidi-font-style: normal">f<sub>+</sub></i>=<i style="mso-bidi-font-style:normal">f</i><sub>1</sub><i style="mso-bidi-font-style:normal">+f</i><sub>2</sub>, <i style="mso-bidi-font-style: normal">f<sub>-</sub></i>= <i style="mso-bidi-font-style:normal">f</i><sub>1</sub><i style="mso-bidi-font-style:normal">-f</i><sub>2<i style="mso-bidi-font-style: normal"> </i></sub>) around the fatigue crack are analyzed. The experimental results show <i style="mso-bidi-font-style:normal">f<sub>±</sub></i> can be used to indicate the presence of the crack. The two-dimensional contour plot of the energy from the sample surface amplitude can be used to locate the crack position. |
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| Date |
2011-12-09T11:57:03Z
2011-12-09T11:57:03Z 2011-10 |
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| Type |
Article
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| Identifier |
0975-1017 (Online); 0971-4588 (Print)
http://hdl.handle.net/123456789/13244 |
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| Language |
en_US
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Publisher |
NISCAIR-CSIR, India
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| Source |
IJEMS Vol.18(5) [October 2011]
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