Composite Piezoelectric Energy Harvesters with Symmetric Angle‐Ply Stacking Sequences and Variable Through‐the‐Thickness Poisson's Ratios. Issue 10 (9th September 2020)

• Record Type: Journal Article
• Authors: Lu, Qingqing; Liu, Liwu; Leng, Jinsong; Scarpa, Fabrizio; Liu, Yanju
• Is Part Of: Physica status solidi. Volume 257:Issue 10(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-09-09
• Subjects: auxetics -- composite laminates -- piezoelectric energy harvesters -- through-the-thickness Poisson's ratios -- zero Poisson's ratios; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201900689
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : Herein, the effect of symmetric carbon fiber composites laminates with angle‐ply stacking sequences ([± β /± θ ]S ) in the design of composite piezoelectric energy harvesters (PEHs) is evaluated. Some of those specific stacking sequences also feature negative Poisson's ratio (NPR) or near zero Poisson's ratio (NZPR) through the thickness for ply angles θ < 45°. Six different architectures with similar in‐plane elastic modulus E 1 and different positive Poisson's ratio and NPR v 13 values are considered here. Finite element models are developed to understand the distribution of the voltage density of the laminates with the different stacking sequences and their bending properties. Experimental tests (three‐point bending and vibration) are also performed. Both the simulations and the experimental results show that the PEH with the stacking sequences of near zero v 13 generate the highest power compared with the other composite energy harvesters. The maximum voltage frequency response function (FRF) happens at the fundamental resonance, and the PEH with near zero v 13 has also the lowest resonance frequency compared with the other stacking sequences. Abstract : Angle‐ply carbon fiber/epoxy laminates with variable through‐the‐thickness Poisson's ratio values are evaluated here as platforms for piezoelectric energy harvesters. Classical laminate theory, finite elements and experiments are conducted and show that composites with negative and zero through‐the‐thickness Poisson's ratio possess the highest specific output energy density at resonance and also maximum voltage under bending.