NDLI: A Combined Static/Dynamic Technique for Damage Detection of Laminated Composite Plates

Content Provider	Springer Nature Link
Author	Qiao, P. Z. Lu, K. Lestari, W.
Copyright Year	2007
Abstract	There is a growing demand to develop viable techniques for effective damage detection of composite structures, and the dynamics-based approach has been broadly used in structural health monitoring. A new combined static/dynamic technique for improved damage detection of laminated composite plates is presented. The promise of the technique is that under the sustaining static load, the abnormality of dynamic response due to damage may become more pronounced and easy to be detected. The experimental program consists of testing an E-glass/epoxy composite plate with an embedded delamination under a pre-set static compressive force, and the dynamic response of laminated composite plates is measured using two different actuator–sensor systems: (1) PZT (lead–zirconate–titanate) actuators and scanning laser vibrometer (SLV) sensing system (PZT–SLV), and (2) PZT actuators and Polyvinylidenefluoride (PVDF) sensors (PZT–PVDF). The influence of sustaining static forces to dynamic response of delaminated composite plates is evaluated. The numerical finite element (FE) analysis is also conducted to verify the effectiveness of this technique. The experimental and numerical mode shapes are used to detect the presence, location, and size of the delamination and to study the effect of static load on dynamic response. Two relatively new damage detection algorithms (i.e., Simplified Gapped Smoothing Method (GSM) and Generalized Fractal Dimension (GFD)) are employed to analyze the Uniform Load Surface (ULS) calculated from the experimental and numerical data. From the dynamic response and analysis results using the damage detection algorithms, it is observed that as the sustaining static load increases, the delamination is much easier to be identified through the enlarged damage parameters. The present combined static/dynamic technique is capable of magnifying the effect of damage, thus improving the effectiveness of damage detection.
Starting Page	17
Ending Page	35
Page Count	19
File Format	PDF
ISSN	00144851
Journal	Experimental Mechanics
Volume Number	48
Issue Number	1
e-ISSN	17412765
Language	English
Publisher	Springer US
Publisher Date	2007-06-14
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Static/dynamic technique Damage detection algorithms Laminated composite plates Delamination Dynamic modal analysis Curvature mode shapes Mechanics Vibration, Dynamical Systems, Control Structural Mechanics Applied Optics, Optoelectronics, Optical Devices Characterization and Evaluation of Materials Continuum Mechanics and Mechanics of Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical Engineering Aerospace Engineering

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