Debonding criterion for the piezoelectric fibre push-out test

Authors: Wang, J.-S.¹; Qin, Q.-H.²

Source: Philosophical Magazine Letters, Volume 86, Number 2, February 2006 , pp. 123-136(14)

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Abstract:

A theoretical model of piezoelectric fibre push-out is developed within the framework of a modified shear-lag theory to study stress and electrical field transfer. Based on the model, a debonding criterion for the piezoelectric effect is presented utilizing a fracture-mechanics approach to investigate the debonding process of piezoelectric fibre in the push-out test for combined electrical and mechanical loading, and for mechanical loading only. A numerical example is considered to verify the proposed debonding criterion. The results show that stress and electrical fields can be controlled by the interface. The study also shows that interfacial properties and piezoelectric coefficients have a significant influence on the debonding process of piezoelectric fibre composites, and the energy-release rate can be enhanced or reduced depending on the direction of electrical loading, which shows that the energy-release rate can be used as the debonding criterion.

Document Type: Research article

DOI: http://dx.doi.org/10.1080/09500830600559682

Affiliations: 1: Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China 2: Department of Engineering, Australian National University, Canberra, ACT 0200, Australia

Publication date: 2006-02-01

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