Structural fatigue crack localisation based on spatially distributed entropy and wavelet transform

Cui，Shihao1; Maghoul，Pooneh1; Liang，Xihui2; Wu，Nan2; Wang，Quan3,4

2022-09-01

10.1016/j.engstruct.2022.114544

ENGINEERING STRUCTURES   Impact Factor & Quartile

0141-0296

1873-7323

Fatigue cracks are inevitable in the service life of engineering structures and can cause unexpected severe structural failures if left unattended. During structural vibrations, fatigue cracks, specifically at the initial stage, exhibit a repetitive open-close breathing-like phenomenon. Breathing cracks cause irregularities, bi-linearity, or perturbations in the vibration responses at different locations in engineering structures. Entropy can be used to quantify the different irregularities or bi-linearity induced by breathing phenomenon. This paper presents a new breathing crack localisation method based on a spatially distributed wavelet entropy approach. A numerical analysis was conducted to validate the proposed method and illustrate the fundamentals of the proposed methodology by analysing the localisation of breathing cracks at different locations in a beam structure. Furthermore, the vibration responses of the beam with predefined breathing cracks were analysed using spatial wavelet entropy in a laboratory setup to further prove the feasibility of the proposed method. It was concluded that the proposed spatial wavelet entropy approach can be effectively used for breathing crack localisation in engineering structures.

Cracklocalisation Structuralhealthmonitoring Entropy Wavelettransform Bi-linearity Crackbreathing

SCI ; EI

English

Others

Engineering

Engineering, Civil

WOS:000827392100004

ELSEVIER SCI LTD

20222612293445

Failure (mechanical) ; Fatigue crack propagation ; Numerical methods ; Spatial distribution ; Structural dynamics ; Structural health monitoring ; Vibration analysis ; Wavelet transforms

Surveying:405.3 ; Structural Design:408 ; Strength of Building Materials; Test Equipment and Methods:422 ; Thermodynamics:641.1 ; Engineering Graphics:902.1 ; Mathematics:921 ; Mathematical Transformations:921.3 ; Numerical Methods:921.6

ENGINEERING

2-s2.0-85132860249

Web of Science

1.Department of Civil,Geological and Mining Engineering,Polytechnique Montréal,Montréal,Canada
2.Department of Mechanical Engineering,University of Manitoba,Winnipeg,Canada
3.Department of Civil and Environmental Engineering,Shantou University,Shantou,China
4.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,China

Cui，Shihao,Maghoul，Pooneh,Liang，Xihui,et al. Structural fatigue crack localisation based on spatially distributed entropy and wavelet transform[J]. ENGINEERING STRUCTURES,2022,266.

Cui，Shihao,Maghoul，Pooneh,Liang，Xihui,Wu，Nan,&Wang，Quan.(2022).Structural fatigue crack localisation based on spatially distributed entropy and wavelet transform.ENGINEERING STRUCTURES,266.

Cui，Shihao,et al."Structural fatigue crack localisation based on spatially distributed entropy and wavelet transform".ENGINEERING STRUCTURES 266(2022).