Incipient Crack Identification in Beam Structures Using the Slope of the Anti-Resonance Curve

Abstract:

Article Preview

Crack damage brings a serious threat to the safety of mechanical and civil structures, and the problem of incipient damage identification of structures has been paying attention as a puzzle by many researchers in recent years. To seek for an alternative solution of the problem, a method for incipient crack localization using the slope of the anti-resonance curve is proposed in this paper. The method makes use of the driving-point mechanical impedance characteristics of cracked beams stimulated by harmonic force. To characterize the local discontinuity due to the presence of crack, a simplified rotational spring model is presented to model the crack. Subsequently, the proposed method is verified by a numerical example of cracked beam under simple support or cantilever boundary conditions.

Info:

Periodical:

Edited by:

L. Garibaldi, C. Surace, K. Holford and W.M. Ostachowicz

Pages:

601-606

Citation:

D. S. Wang et al., "Incipient Crack Identification in Beam Structures Using the Slope of the Anti-Resonance Curve", Key Engineering Materials, Vol. 347, pp. 601-606, 2007

Online since:

September 2007

Export:

Price:

$38.00

[1] S. W. Doebling, C. R. Farrar and M. B. Prime et Al: Shock and vibration Digest, Vol. 30(1998), p.91.

[2] A. D. Dimarogonas: Vibration Engineering (West Publishers, St. Paul, MA 1976).

[3] P.F. Rizos, N. Aspragathos, A.D. Dimarogonas: Journal of Sound and Vibration, Vol. 138(1990). P. 381.

[4] M. Dilena, A. Morassi: Journal of Sound and Vibration, Vol. 276(2004), p.195.

[5] G. Bamnios, A. Trochides: Applied Acoustics, Vol. 45(1995), p.97.

[6] Y. Bamnios, E. Douka, and A. Trochidis: Journal of Sound and Vibration, Vol. 256(2002), p.287.

[7] D. S. Wang, H. P. Zhu: Proceedings of the Second International Conference on Structural Health Monitoring of Intelligent Infrastructure, 16-18, Nov, 2005, Shenzhen, China, p.771.

[8] D. S. Wang, H. P. Zhu: Key Engineering materials, Vol. 293-294(2005), p.557.