A pre-loaded cracked cantilever beam was excited vising a random vibration signal. Excitation levels were within the range of amplitudes that caused no suspicion of non-linear behaviour in an undamaged specimen of identical dimensions and material. Spectral signatures were acquired which made it possible to discriminate between open crack, closed crack and breathing conditions. Systematic effects relating to variations in resonant frequency were largely consistent with the literature for a lightly damaged beam but were unsupported for a beam with more severe damage.
CawleyP.AdamsR. D.The location of defects in structures from measurements of natural frequencies. J. Strain Analysis, 1979, 14(2), 49–57.
2.
BrandonJ. A.A critique of location criteria in modal methods for structural damage identification. J. Sound Vibr., 1997, 203(4), 728–729.
3.
BiswasM.PandeyA. K.BluniS. A.Modified chain-code computer vision techniques for interrogation of vibration signatures for structural fault detection. J. Sound Vibr., 1994, 175(1), 89–104.
4.
MottersheadJ. E.FriswellM. I.Model updating in structural dynamics: A survey. J. Sound Vibr., 1993, 167(2), 347–375.
5.
MottersheadJ. E.FriswellM. I.NgG. T. H.BrandonJ. A.Geometric parameters for finite element model updating of joints and constraints. Mechanical Syst. and Signal Processing, 1996, 10(2), 171–182.
6.
BrandonJ. A.Strategies for Structural Dynamic Modification, 1990 (Research Studies Press).
7.
BrandonJ. A.Modal modelling of structures with isolated non-linearities. In New Advances in Modal Synthesis of Large Structures: Nonlinear, Damped and Non-deterministic Cases (Ed. JezequelL.), 1997, pp. 447–456 (Balkema, Rotterdam).
8.
BrandonJ. A.Nonlinear vibration of cracked structures: the practical implications of some recent research results. In Proceedings of 7th ISMA International Conference on Noise and Vibration Engineering, 1996, pp. 1045–1056 (Katholieke Universiteit, Leuven).
9.
Dulieu-SmithJ. M.StaszewskiW. J.WordenK. (Eds). In Euromech 365: Structural Damage Assessment Using Advanced Signal Processing Procedures, 1997 (Sheffield University Press).
10.
BrandonJ. A.SudraudC.HolfordK. M.An experimental study of the dynamics of a cracked beam. In Proceedings of Fifth International Conference on Recent Advances in Structural Dynamics, Southampton, 1994, Vol. 1, pp. 234–242 (Institute of Sound and Vibration Research).
11.
BrandonJ. A.MathiasM. H.Complex oscillatory behaviour in a cracked beam under sinusoidal excitation. J. Sound Vibr., 1995, 186(2), 350–354.
12.
BrandonJ. A.BenoitE.JezequelL.Subtle bifurcation in the vibration of a system with an interface nonlin-earity. J. Chaos, Fractals and Solitons, 1998, 9(3), 393–400.
13.
BrandonJ. A.StephensA. E.LopesE. M. O.KwanA. S. K.Regular orbits exhibiting multiple impact characteristics from a cracked beam under sinusoidal excitation. J. Chaos, Fractals and Solitons, 1998, 9(9), 1473–1480.
14.
BrandonJ. A.McLeodD.An investigation into the interface mechanics in fractures, part two: Experimental results. Interfaces in Medicine and Mechanics (Eds WilliamsK. R.), 1991, pp. 406–412 (Elsevier Applied Science).
