3-D Stress Analysis of Cross-Ply Laminated Composites

[+] Author and Article Information
C. C. Chao, T. P. Tung, H. H. Li

Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, ROC

J. Energy Resour. Technol 116(3), 240-249 (Sep 01, 1994) (10 pages) doi:10.1115/1.2906449 History: Received July 10, 1993; Revised April 14, 1994; Online April 16, 2008


A consistent higher-order theory is presented for static deformation and stress analysis of cross-ply thick laminates. Emphasis is placed on consistence with the 3-D boundary conditions and interlaminar stress continuity, exterior and interior, respectively, to the simply supported rectangular plate. All edges and lateral surfaces are considered stress-free, while surface traction and applied load equilibrium is maintained in the loading area. Individual layer displacement fields are expressed in terms of in-plane double Fourier series and cubic polynomials in thickness coordinates with continuity of interlaminar displacements and transverse stresses observed. A system of equations is derived with all these necessary conditions satisfied by means of the higher-order terms of the displacement fields in the extended Rayleigh-Ritz procedure. 3-D displacement and stress components, as compared well with exact solution cases available, can be found throughout the plate for 3-D analysis of localized damage. Thickness shrinking is noted with no mid-surface symmetry of stress distribution.

Copyright © 1994 by The American Society of Mechanical Engineers
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