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Porous piezoelectric materials for energy harvesting

Martinez-Ayuso, G, Friswell, M, Adhikari, S, Haddad Khodaparast, H and Featherston, Carol. 2016. Porous piezoelectric materials for energy harvesting. Presented at: 27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, Leuven; Belgium, 19-21 September 2016.

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Abstract

In this paper, we assess the energy harvesting capabilities of porous piezoelectric material under harmonic excitation and investigate the advantages of functionally grading the air inclusions. A cantilever beam energy harvester with base excitation is used to demonstrate the effects of porosity on the power generated. A homogenization step using the analytical Mori-Tanaka approach is performed initially to reduce the computational requirements. This homogenization will estimate the material properties for different levels of porosity. An Euler-Bernoulli beam model is used to efficiently estimate the power generated for a piezoelectric sensor with uniform properties. A 2D finite element model is then developed to verify the beam model; this detailed model may be used to analyze harvesters where the porosity varies through the thickness or along the length of the beams. An optimization is performed, focusing on the impact of the percentage of inclusions on the energy harvesting efficiency

Item Type: Conference or Workshop Item (Paper)
Date Type: Completion
Status: Unpublished
Schools: Engineering
Date of First Compliant Deposit: 28 June 2017
Last Modified: 04 Jul 2019 13:41
URI: http://orca.cf.ac.uk/id/eprint/100652

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