
Accession Number : ADA153040
Title : Solution to Eigenvalue Problems of Antisymmetric CrossPly and Antisymmetric AnglePly Laminated Plates Using Affine Transformations.
Descriptive Note : Master's thesis,
Corporate Author : AIR FORCE INST OF TECH WRIGHTPATTERSON AFB OH SCHOOL OF ENGINEERING
Personal Author(s) : Chaudhry,Z A
PDF Url : ADA153040
Report Date : Dec 1984
Pagination or Media Count : 105
Abstract : Using affine transformations and suitably recasting the buckling vibration differential equations, the eigenvalue problem of antisymmetric crossply and antisymmetric angleply laminated rectangular plates has been reduced to a function of two strong material constants, the generalized rigidity ratio, whose range is in the closed interval from 0 to 1, and the ratio of principal lamina stiffness. With the reduction in number of constants an exhaustive parameter study of buckling and vibration solution trends, is possible. The buckling coefficients decrease with decreasing value of generalized rigidity ratio for both antisymmetric crossply and antisymmetric angleply laminates. For a given aspect ratio, and ratio of principal lamina stiffnesses, the buckling and frequency coefficient for antisymmetric crossply laminates vary linearly with the value of the generalized rigidity ratio, so that one may accurately interpolate between the values of the generalized rigidity ratio. The buckling and frequency coefficients increase with increasing F for antisymmetric crossply laminates. No such trend could be established for antisymmetric angleply laminates. A simple and fairly accurate method has been established for estimating the buckling and vibration coefficients for antisymmetric crossply laminates. Keywords include: Composite Materials, Laminates, Buckling, Vibration.
Descriptors : *COMPOSITE MATERIALS, *LAMINATES, RATIOS, VIBRATION, EIGENVALUES, COEFFICIENTS, BUCKLING, DIFFERENTIAL EQUATIONS, RIGIDITY, ASPECT RATIO, INTERVALS
Subject Categories : Containers and Packaging
Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE