Design sensitivity and optimization of composite cylinders

Aditi Chattopadhyay, Jay Ferreira

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Composite cylinders are often used in both rotary- and fixed-wing applications where low weight and high strength are important design issues. This paper, the first of a two-phase study, addresses the failure of such cylinders, under axial compressive loading, using design optimization and sensitivity analysis procedures. Thin-walled cylinders made of different types of symmetric orthotropic laminates and several wall thicknesses are examined. Formal optimization techniques are used and the diameter and individual ply orientations are varied to maximize the critical buckling load of the cylinder. Constraints are imposed on the longitudinal, normal and inplane shear stresses of each ply. The optimization is performed using the nonlinear programming method of feasible directions. A two-point exponential approximation method is also used to reduce computational effort. Results are presented for Graphite/Epoxy, Glass/Epoxy and Kevlar/Epoxy composite cylinders with symmetric ply arrangements.

Original languageEnglish (US)
Pages (from-to)169-179
Number of pages11
JournalComposites Engineering
Volume3
Issue number2
DOIs
StatePublished - 1993

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Fixed wings
Graphite
Composite materials
Nonlinear programming
Sensitivity analysis
Laminates
Buckling
Shear stress
Glass
Design optimization
Direction compound

Cite this

Design sensitivity and optimization of composite cylinders. / Chattopadhyay, Aditi; Ferreira, Jay.

In: Composites Engineering, Vol. 3, No. 2, 1993, p. 169-179.

Research output: Contribution to journalArticle

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