Accession Number : ADA304616

Title :   Shear-Flexible Finite-Element Models of Laminated Composite Plates and Shells.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Noor, Ahmed K. ; Mathers, Michael D.

PDF Url : ADA304616

Report Date : DEC 1975

Pagination or Media Count : 113

Abstract : Several finite-element models are applied to the linear static, stability, and vibration analysis of laminated composite plates and shells. The study is based on linear shallow-shell theory, with the effects of shear deformation, anisotropic material behavior, and bending-extensional coupling included. Both stiffness (displacement) and mixed finite-element models are considered. Discussion is focused on the effects of shear deformation and anisotropic material behavior on the accuracy and convergence of different finite-element models. Numerical studies are presented which show the effects of (a) increasing the order of the approximating polynomials, (b) adding internal degrees of freedom, and (c) using derivatives of generalized displacements as nodal parameters.

Descriptors :   *STRESS ANALYSIS, *LAMINATES, *FINITE ELEMENT ANALYSIS, *DEFORMATION, STRESS STRAIN RELATIONS, MATHEMATICAL MODELS, LINEAR SYSTEMS, STABILITY, VIBRATION, STATIC LOADS, STRUCTURAL MECHANICS, STIFFNESS, DISPLACEMENT, MODULUS OF ELASTICITY, COMPOSITE STRUCTURES, SHELLS(STRUCTURAL FORMS), DEGREES OF FREEDOM, CYLINDRICAL BODIES, PLATES, APPROXIMATION(MATHEMATICS), ANISOTROPY, SHEAR STRESSES, POLYNOMIALS, INTERPOLATION, BUCKLING, CONVERGENCE, BENDING STRESS, SHEAR STRENGTH.

Subject Categories : Laminates and Composite Materials
      Mechanics
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE