Micromechanical analysis of damping performance of piezoelectric structural fiber composites

Qingli Dai; Kenny Ng

doi:10.1117/12.851827

30 March 2010 Micromechanical analysis of damping performance of piezoelectric structural fiber composites

Qingli Dai, Kenny Ng

Proceedings Volume 7644, Behavior and Mechanics of Multifunctional Materials and Composites 2010; 76441K (2010) https://doi.org/10.1117/12.851827
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

Recent studies showed that the active piezoelectric structural fiber (PSF) composites may achieve significant and simultaneous improvements in sensing/actuating, stiffness, fracture toughness and vibration damping. These characteristics can be of particular importance in various civil, mechanical and aerospace structures. This study firstly conducted the micromechanical finite element analysis to predict the elastic properties and piezoelectrical coupling parameters of a special type of an active PSF composite laminate. The PSF composite laminates are made of longitudinally poled PSFs that are unidirectionally deployed in the polymer binding matrix. The passive damping performance of these active composites was studied under the cyclic force loadings with different frequencies. It was found that the passive electric-mechanical coupling behavior can absorb limited dynamic energy and delay the structure responses with minimum viscoelastic damping. The actuating function of piezoelectric materials was then applied to reduce the dynamic mechanical deformation. The step voltage inputs were imposed to the interdigital electrodes of PSF laminate transducer along the poled direction. The cyclic pressure loading was applied transversely to the composite laminate. The electromechnical interaction with the 1-3 coupling parameter generated the transverse expansion, which can reduce the cyclic deformation evenly by shifting the response waves. This study shows the promise in using this type of active composites as actuators to improve stability of the structure dynamic.

Citation Download Citation

Qingli Dai and Kenny Ng "Micromechanical analysis of damping performance of piezoelectric structural fiber composites", Proc. SPIE 7644, Behavior and Mechanics of Multifunctional Materials and Composites 2010, 76441K (30 March 2010); https://doi.org/10.1117/12.851827

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