Incipient Crack Identification in Beam Structures Using the Slope of the Anti-Resonance Curve
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.
L. Garibaldi, C. Surace, K. Holford and W.M. Ostachowicz
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