THROUGH-THE-THICKNESS STRESS PREDICTIONS FOR LAMINATED PLATES OF ADVANCED COMPOSITE-MATERIALS
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A finite element formulation is developed with emphasis primarily focused on providing stress predictions for thin to moderately thick plate (shell) type structures. Plate element behaviour is specified by prescribing independently the neutral surface displacements and rotations, thus relaxing the Kirchhoff hypothesis. Numerical efficiency is achieved due to the simplicity of the element formulation, i.e. the approach yields a displacement dependent multilayer model. Inplane layer stresses are determined via the constitutive equations, while the transverse shear and shorttransverse normal stresses are determined via the equilibrium equations. Accurate transverse stress variations are obtained by appropriately selecting the displacement field for the element. A selective reduced integration technique is utilized in computing element stiffness matrices. Static and spectral (eigenvalue) tests are performed to demonstrate the element modelling capability. Copyright 1985 John Wiley & Sons, Ltd
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
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ENGBLOM, J. J., & OCHOA, O. O.
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