Accession Number:

ADA243866

Title:

The Use of a Higher Order Kinematic Relationship on the Analysis of Cylindrical Composite Panels

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1991-12-01

Pagination or Media Count:

258.0

Abstract:

An analytical study was performed to determine the critical buckling loads and natural frequencies for composite cylindrical shells, including transverse shear effects and constant through the thickness direct strain epsilon sub z. A linearized form of Sanders shell equations are derived, including a parabolic transverse shear strain distribution. Higher order laminate constitutive relations are developed. Hamiltons Principle is applied to derive five partial differential equations of motion and the associated boundary conditions, which are then solved using the Galerkin technique. Ply layups of 090, 45-45, and 045-4590 were investigated under three boundary conditions, simply supported, clamped, and a combination simple- clamped. Symmetric and nonsymmetric laminates were investigated. Curvature is shown to have a important effect on all panels investigated, due to membrane and bending coupling. Buckling loads for deeper shells are significantly higher than for flat plates. The effect on frequencies is not as great. Comparisons between various ply layups and boundaries show results are greatly dependent on the shell geometry, curvature, and boundary conditions.

Subject Categories:

  • Structural Engineering and Building Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE