REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

OPTIMAL DESIGN OF AIRCRAFT STRUCTURAL COMPONENTS

NENAD BERIĆ

Special Brigade, Pančevo, nenadberic@yahoo.com

STEVAN MAKSIMOVIĆ

Military Technical Institute, Belgrade, s.maksimovic@open.telekom.rs

Abstract: Subject of this investigation is focused on developing computation procedure for optimal design of aircraft structural components with respects to stress, displacement and technology constraints. Attention is focused on minimum weight design of plates with reinforced hole. Optimal design procedure is based on combining finite element method (FEM) for the structural analysis with using optimality criteria (OC) method in optimization process. Special attention is focused on optimal design of structural components with reinforced holes. The effect of shape of reinforcements around hole to optimal design is analyzed. Some practical design examples are used to illustrate the capability of this procedure.

Keywords: aircraft constructions, optimal design, minimum weight design, stress constraints, finite element method