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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.18 [2011] >
IJEMS Vol.18(5) [October 2011] >
| Title: | Experimental study on fatigue crack identification of 7075 aluminium alloy plate using combination NEWMS and TRA |
| Authors: | Gao, G L
Shi, D Q
Li, D Y
Dong, J W
Shi, X D |
| Keywords: | Fatigue crack
Identification
Intermodulation
Nonlinear elastic wave modulation spectroscopy
Time reversal acoustic
7075 Alumnium alloy plate |
| Issue Date: | Oct-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | 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 (f1=270
kHz and f2=70 kHz), two
types of samples, one is with the crack and the other is without the crack, are
comparatively experimented. Intermodulation components (f+=f1+f2, f-= f1-f2 ) around the fatigue crack are analyzed. The experimental
results show f± 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. |
| Page(s): | 377-380 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.18(5) [October 2011]
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