Effect of damage and support damping mechanisms on unimorph piezoelectric energy harvester. (September 2019)

• Record Type: Journal Article
• Authors: Khazaee, Majid; Rezania, Alireza; Rosendahl, Lasse
• Is Part Of: Journal of vibration and control. Volume 25:Number 18(2019)
• Page Start: 2409
• Page End: 2422
• Publication Date: 2019-09
• Subjects: Piezoelectric energy harvesting -- unimorph -- damping effect -- debonding effect -- support loss; Vibration -- Periodicals; Damping (Mechanics) -- Periodicals; 620.3
• DOI: 10.1177/1077546319855162
• Languages: English
• ISSNs: 1077-5463

Abstract

Damping plays a critical role in power generation by piezoelectric energy harvesting, and yet there is a lack of sensitivity studies on different sources of damping. In this paper, two damping sources in unimorph piezoelectric energy harvesters, namely support loss and damage damping mechanisms, are experimentally investigated. Variations of the power generation are evaluated with respect to the sources of damping. Accordingly, the power generation model is developed according to the experimental results in this work and using a single degree of freedom analytical model. This study focuses on the debonding effect, as an internal damping source, and support loss, as a critical source of external energy dissipation. The results show that the debonding reduces the output power dramatically at resonance and, particularly, at anti-resonance frequencies. Moreover, investigation of the support loss shows that the material of clamp as well as installation torque have an impact on the support loss and, consequently, affect the output power.