Experimental damage detection of cracked beams by using nonlinear characteristics of forced response

Andreaus, Ugo; Baragatti, P.

doi:10.1016/j.ymssp.2012.04.007

Cited by 110 publications

(45 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous papers have been published on the vibration analysis of a finite cracked plate by using theoretical and numerical methods [3][4][5][6][7]. Nevertheless, compared with numerical studies in the past, there have been relatively few investigations on the behavior of the cracked plates by experimental measurement [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Non-Linear Vibration Response of Cantilevered Thin Plates with Crack Using Electronic Speckle Pattern Interferometry

Tao

Jiang

et al. 2018

The 18th International Conference on Experimental Mechanics

View full text Add to dashboard Cite

Abstract:The time-averaged electronic speckle pattern interferometry (ESPI) is employed to measure the frequencies and mode shapes of thin, cantilevered plates with root-slit. The first 12 order linear resonance frequency and mode shape of an intact cantilevered plate is determined by using FEM calculation. The dynamic response of the intact specimen forced by a PZT actuator is measured and its super-harmonic resonance of forced response is investigated experimentally. The results show that the principal mode shape of super-harmonic vibration is similar to its natural modal. In contrast to linear forcing vibration, the threshold of force for super-harmonic resonance is much higher than that of the former. In addition, linear free response of four cantilevered rootslit plates with variation length of slit are analyzed by applying the FEM calculation, and their responses of forcing vibration were measured by using the ESPI method. The validity and accuracy of the numerical prediction are confirmed through experimental studies. The present work shows that the ESPI technique can provide whole-field and real-time measurement for vibration analysis and can also be employed for validation of the FEM calculation.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation on Non-Linear Vibration Response of Cantilevered Thin Plates with Crack Using Electronic Speckle Pattern Interferometry

Tao

Jiang

et al. 2018

The 18th International Conference on Experimental Mechanics

View full text Add to dashboard Cite

show abstract

“…A 2-D FE model of beam with a breathing crack was investigated in [39][40][41]. The excitation frequency corresponded to harmonics and sub-harmonics of the natural frequency of the beam.…”

Section: Introductionmentioning

confidence: 99%

Generation of higher harmonics in longitudinal vibration of beams with breathing cracks

Broda

Pieczonka

Hiwarkar

et al. 2016

Journal of Sound and Vibration

View full text Add to dashboard Cite

a b s t r a c tClassical nonlinear vibration methods used for structural damage detection are often based on higher-and sub-harmonic generation. However, nonlinearities arising from sources other than damage -e.g. boundary conditions or a measurement chain -are a primary concern in these methods. This paper focuses on localisation of damage-related nonlinearities based on higher harmonic generation. Numerical and experimental investigations in longitudinal vibration of beams with breathing cracks are presented. Numerical modelling is performed using a two-dimensional finite element approach. Different crack depths, locations and boundary conditions are investigated. The results demonstrate that nonlinearities in cracked beams are particularly strong in the vicinity of damage, allowing not only for damage localisation but also for separation of crack induced nonlinearity from other sources of nonlinearities.

show abstract

“…These approaches are probably more realistic, but they can also be impractical for crack detection since the computation time is often prohibitive, especially in relatively complex structures such as thin-walled beams. Furthermore, experimental tests could be needed in order to validate numerical methods devoted to the identification of breathing cracks [38].…”

Section: Introductionmentioning

confidence: 99%

Non-linear dynamic response to simple harmonic excitation of a thin-walled beam with a breathing crack

Dotti

Cortínez

Reguera

2016

Applied Mathematical Modelling

View full text Add to dashboard Cite

The dynamic response of a thin-walled beam with a breathing crack is studied by employing a refined one-dimensional model introduced for such purpose. It is shown that, due to the nonlinearity of breathing, some effects take place which are impossible by using a completely open crack model. Even with the simplest of sinusoidal excitations, the system under study reveals a rich and complex dynamics. Some of the topics emphasized in the article are self-excitation of harmonic resonances, period doubling and the presence of quasi-periodic motion. Furthermore, the possibility of chaotic vibrations is analyzed.

show abstract

Experimental damage detection of cracked beams by using nonlinear characteristics of forced response

Cited by 110 publications

References 52 publications

Investigation on Non-Linear Vibration Response of Cantilevered Thin Plates with Crack Using Electronic Speckle Pattern Interferometry

Investigation on Non-Linear Vibration Response of Cantilevered Thin Plates with Crack Using Electronic Speckle Pattern Interferometry

Generation of higher harmonics in longitudinal vibration of beams with breathing cracks

Non-linear dynamic response to simple harmonic excitation of a thin-walled beam with a breathing crack

Contact Info

Product

Resources

About