Date of Award

12-1984

Document Type

Thesis

Degree Name

Master of Science

First Advisor

E. J. Brunelle, PhD

Abstract

Using affine transformations and suitably recasting the buckling vibration differential equations, the eigenvalue problem of anti-symmetric cross-ply and antisymmetric angle-ply 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 cross-ply and antisymmetric angle-ply laminates. For a given aspect ratio, and ratio of principal lamina stiffnesses, the buckling and frequency coefficient for antisymmetric cross-ply 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 cross-ply laminates. No such trend could be established for antisymmetric angle-ply laminates. A simple and fairly accurate method has been established for estimating the buckling and vibration coefficients for anti-symmetric cross-ply laminates.

AFIT Designator

AFIT-GAE-AA-84D-5

DTIC Accession Number

ADA153040

Comments

Zaffir Chaudry is a 2022 recipient of the AFIT International Alumni Award.

Sourced from the DTIC archival scan of microfiche.

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