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TECHNICAL PAPERS

Nonlinear Theory for Composite Laminated Shells With Interfacial Damage

[+] Author and Article Information
Zhen-qiang Cheng

Department of Modern Mechanics, University of Science and Technology of China Hefei, Anhui 230026, P. R. China

S. Kitipornchai

Department of Civil Engineering, The University of Queensland, Brisbane, QLD 4072, Australia

J. Appl. Mech 65(3), 711-718 (Sep 01, 1998) (8 pages) doi:10.1115/1.2789115 History: Received July 30, 1997; Received November 03, 1997; Online October 25, 2007

Abstract

Interfacial damage is incorporated in the proposed nonlinear theory. for composite laminated shells. A spring-layer model is employed to characterize damaged interfaces spanning from perfect bonding to different degrees of imperfect bonding in shear. By enforcing compatibility conditions for transverse shear stresses both at interfaces and on two bounding surfaces of a laminated shell, only five unknowns are needed for modeling its behavior. The principle of virtual work is used to derive the governing equations, which are of 14th order in lines of curvature coordinates, variationally self-consistent with seven prescribed boundary conditions. This theory includes the conventional higher-order zigzag model for a perfectly bonded shell as a special case. Numerical results provide a physical understanding of the effect of interracial damage on bending and buckling responses of composite laminated shells.

Copyright © 1998 by The American Society of Mechanical Engineers
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