EFFECT OF MATERIAL NONLINEARITY ON BUCKLING AND POSTBUCKLING OF FIBER-COMPOSITE LAMINATED PLATES AND CYLINDRICAL-SHELLS

Citation
Ss. Wang et al., EFFECT OF MATERIAL NONLINEARITY ON BUCKLING AND POSTBUCKLING OF FIBER-COMPOSITE LAMINATED PLATES AND CYLINDRICAL-SHELLS, Composite structures, 33(1), 1995, pp. 7-15
Citations number
17
Categorie Soggetti
Materials Sciences, Composites
Journal title
ISSN journal
02638223
Volume
33
Issue
1
Year of publication
1995
Pages
7 - 15
Database
ISI
SICI code
0263-8223(1995)33:1<7:EOMNOB>2.0.ZU;2-#
Abstract
An analytical study is presented in this paper on the effect of materi al nonlinearity on buckling and postbuckling of fiber composite lamina te plates and shells subjected to general mechanical loading. The mate rial nonlinearity of the composite is modelled by power-law type, nonl inear shear constitutive equations for each lamina. The nonlinear effe ctive composite constitutive equations in an incremental form are inco rporated into a geometrically nonlinear analysis for studying buckling and postbuckling deformations of composite laminate structures. A mod ified Riks' solution scheme with an updated Lagrangian formulation is used to construct the equilibrium path during composite postbuckling. Numerical examples are given to illustrate the effect of material nonl inearity on buckling load, postbuckling stiffness, and associated mode shape change of a composite structure under axial and pressure loadin g. Influences of lamination parameters, geometric imperfection, and lo ading mode on the postbuckling equilibrium path and load-bearing stren gth of the composite structure with the nonlinear material properties are also studied.