On a generalized laminate theory with application to bending, vibration, and delamination buckling in composite laminates
In this study, a computational model for accurate analysis of composite laminates and laminates with including delaminated interfaces is developed. An accurate prediction of stress distributions, including interlaminar stresses, is obtained by using the Generalized Laminate Plate Theory of Reddy in which layer-wise linear approximation of the displacements through the thickness is used. Analytical as well as finite-element solutions of the theory are developed for bending and vibrations of laminated composite plates for the linear theory. Geometrical nonlinearity, including buckling and postbuckling are included and used to perform stress analysis of laminated plates. A general two dimensional theory of laminated cylindrical shells is also developed in this study. Geometrical nonlinearity and transverse compressibility are included. Delaminations between layers of composite plates are modelled by jump discontinuity conditions at the interfaces. The theory includes multiple delaminations through the thickness. Geometric nonlinearity is included to capture layer buckling. The strain energy release rate distribution along the boundary of delaminations is computed by a novel algorithm. The computational models presented herein are accurate for global behavior and particularly appropriate for the study of local effects.
- Research Organization:
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA)
- OSTI ID:
- 5940023
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
ALGORITHMS
ANALYTICAL SOLUTION
BENDING
COMPOSITE MATERIALS
COMPRESSIBILITY
DEFORMATION
FINITE ELEMENT METHOD
INTERFACES
LAYERS
MATERIALS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICAL VIBRATIONS
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
PLATES
SHELLS
STRESS ANALYSIS