Experimental and numerical study on microcrack detection using contact nonlinear acoustics

Abstract

This paper introduces a non-classical nonlinear acoustic theory for microcrack detection in materials, comparing contact nonlinearity with material nonlinearity. The paper’s main work concentrates on the experimental and numerical verification of the effectivity of contact nonlinear acoustic detection by using the contact nonlinear parameter {\beta }^{\prime }, which can be represented by the ratio of the second-harmonic amplitude to the square of the first-harmonic amplitude. Both experiments and numerical tests are performed. The results show that {\beta }^{\prime } is sensitive to the initiation of microcracks and varies with the development of the microcracks. The numerical test illustrates the decline of {\beta }^{\prime } when microcracks penetrate each other.

Keywords

microcrack detection / contact nonlinearity / numerical analysis

References

[1] Yost W T, Cantrell J H. The effects of fatigue on acoustic nonlinearity in aluminum alloys. In: Ultrasonics Symposium, 1992. Proceedings, IEEE,1992, 947–955

[2] Nagy P B. Fatigue damage assessment by nonlinear ultrasonic materials characterization. Ultrasonics, 1998, 36(1-5): 375–381

[3] Frouin J. Acoustical linear and nonlinear behavior of fatigued titanium alloys. OH: Dayton University, 2001

[4] Shah A A, Ribakov Y, Hirose S. Nondestructive evaluation of damaged concrete using nonlinear ultrasonics. Materials and Design, 2008, 30(3): 775–782

[5] Donskoy D, Sutin A, Ekimov A. Nolinear acoustic interaction on contact interfaces and its use for nondestructive testing. NDE & International, 2001, 34(4): 231–238

[6] Chen X J, Kim J Y, Qu J, Kurtis K E, Wo S C, Jacobs L J. Microcrack identification in cement-based materials using nonlinear acoustic waves. Review of Progress in Quantitative Nondestructive Evaluation, AIP Proceedings, 2007, 894: 1361–1367

[7] Solodov I Y. Ultrasonic of non-linear contacts: propagation, refection and NDE application. Ultrasonics, 1998, 36(1-5): 383–390

[8] Solodov I Y, Krohn N, Busse G. CAN: an example of nonclassical acoustic nonlinearity in solids. Ultrasonics, 2002, 40(1-8): 621–625

[9] Chen Xiajia. Study on initial damage detection and evaluation of concrete based on nonlinear acoustic features. Wuhan: Wuhan University of Technology, 2007 (in Chinese)

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg