Vol. 7, No. 1, 2012

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ISSN: 1559-3959
Postbuckling and delamination growth for delaminated piezoelectric elastoplastic laminated beams under hygrothermal conditions

Ying-Li Li, Yi-Ming Fu and Hong-Liang Dai

Vol. 7 (2012), No. 1, 85–102
Abstract

The postbuckling and delamination growth for delaminated piezoelectric elastoplastic laminated beams under hygrothermal conditions are investigated. By considering hygrothermal environments, transverse shear deformation, geometrical nonlinearity and piezoelectric effect, the incremental nonlinear equilibrium equations of the piezoelectric elastoplastic laminated beams with delamination are obtained. The finite difference method and iterative method are adopted to solve the equations. Based on these, the delamination growth for the piezoelectric elastoplastic laminated beams is studied using J-integral theory. In the numerical examples, the effects of hygrothermal environments, transverse shear deformation, geometrical nonlinearity and piezoelectricity on the postbuckling behavior and delamination growth for the delaminated piezoelectric elastoplastic laminated beams are discussed in detail.

Keywords
hygrothermal conditions, piezoelectric effect, postbuckling, delamination growth, J-integral
Milestones
Received: 24 December 2010
Revised: 10 April 2011
Accepted: 11 April 2011
Published: 28 March 2012
Authors
Ying-Li Li
State Key Lab of Advanced Design and Manufacturing for Vehicle Body
College of Mechanical and Vehicle Engineering
Hunan University
Changsha, 410082
China
Yi-Ming Fu
College of Mechanical and Vehicle Engineering
Hunan University
Changsha, 410082
China
Hong-Liang Dai
College of Mechanical and Vehicle Engineering
Hunan University
Changsha, 410082
China