A noise-robust damage indicator for characterizing singularity of mode shapes for incipient delamination identification in CFRP laminates

Xu, Wei1; Fang, Hongyuan2; Cao, Maosen1; Zhou, Limin3; Wang, Quan4; Ostachowicz, Wieslaw5

2019-04-15

10.1016/j.ymssp.2018.10.025

MECHANICAL SYSTEMS AND SIGNAL PROCESSING   影响因子和分区

0888-3270

Identification of delaminations in the early stage is crucial to ensure the safety of CFRP laminates. In the modal domain, high spatial sampling resolution of a mode shape is required for precise location of incipient delamination. Non-contact measurement relying on laser scanning technology allows measured mode shapes to be densely sampled. Unfortunately, noise components usually contaminate such densely-sampled mode shapes, easily causing intense noise interference that likely masks actual delamination features. To address this issue, a noise-robust damage indicator is formulated for designating the presence and location of incipient delamination in CFRP laminates under noisy environments. This damage indicator is created by introducing a 2D multi-resolution modal Teager-Kaiser energy for characterizing delamination-caused singularity of mode shapes. Proof of concept of the damage indicator is numerically undertaken in finite-element CFRP laminates with incipient delaminations, with emphasis on sensitivity to damage as well as robustness against noise. The applicability of the damage indicator is experimentally validated on a CFRP laminate with an incipient delamination, mode shapes of which are precisely acquired via the non-contact measurement using a scanning laser vibrometer. The numerical and experimental results show that the damage indicator can effectively identify the presence and location of incipient delamination in CFRP laminates under noisy environments. (C) 2018 Published by Elsevier Ltd.

CFRP laminate Incipient delamination identification Mode shape Damage indicator 2D multi-resolution modal Teager-Kaiser energy Scanning laser vibrometer

SCI ; EI

英语

其他

China Postdoctoral Science Foundation[2018T110433] ; China Postdoctoral Science Foundation[2017M610289]

Engineering

Engineering, Mechanical

WOS:000458228700013

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

20184706129141

Fiber optic sensors ; Laminates ; Location ; Nonlinear distortion ; Scanning

Information Theory and Signal Processing:716.1 ; Fiber Optics:741.1.2

ENGINEERING

Web of Science

1.Hohai Univ, Dept Engn Mech, Nanjing 210098, Jiangsu, Peoples R China
2.Zhengzhou Univ, Coll Water Conservancy & Environm Engn, Zhengzhou 450001, Henan, Peoples R China
3.Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hung Hom, Hong Kong, Peoples R China
4.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
5.Polish Acad Sci, Inst Fluid Flow Machinery, PL-80231 Gdansk, Poland

Xu, Wei,Fang, Hongyuan,Cao, Maosen,et al. A noise-robust damage indicator for characterizing singularity of mode shapes for incipient delamination identification in CFRP laminates[J]. MECHANICAL SYSTEMS AND SIGNAL PROCESSING,2019,121:183-200.

Xu, Wei,Fang, Hongyuan,Cao, Maosen,Zhou, Limin,Wang, Quan,&Ostachowicz, Wieslaw.(2019).A noise-robust damage indicator for characterizing singularity of mode shapes for incipient delamination identification in CFRP laminates.MECHANICAL SYSTEMS AND SIGNAL PROCESSING,121,183-200.

Xu, Wei,et al."A noise-robust damage indicator for characterizing singularity of mode shapes for incipient delamination identification in CFRP laminates".MECHANICAL SYSTEMS AND SIGNAL PROCESSING 121(2019):183-200.