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

STRENGTH ANALYSIS OF AIRCRAFT STRUCTURES WITH RESPECTS TO FATIGUE

Stevan MaksimoviĆ

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

MARIJA BLAŽIĆ

Military Technical Institute, Belgrade

IVANA VASOVIĆ

Institute Gosa, Belgrade, ivanavvasovic@gmail.com

MIRJANA ĐURIĆ

Military Technical Institute, Belgrade

MIRKO MAKSIMOVIĆ

Belgrade Waterworks and Sewerage, Belgrade

Abstract: Subject of this investigation is focused on developing computation procedure for strength analysis of aircraft structures with respects to fatigue. For that purpose here will be defined computation procedures for life estimation of constructions under cyclic loads of constant amplitude and load spectrum. An special aspect of this investigation is based on application of Strain Energy Density (SED) in residual life estimation of structural elements with initial cracks. Verification of computation procedures for life estimations will be supported with corresponding experimental tests for determination low cyclic fatigue properties of materials and corresponding parameters of fracture mechanics including fatigue tests of representative aircraft structural elements.

Key words: aircraft constructions, aircraft strength, fatigue of material, fatigue tests, fracture mechanics, life estimation, finite element method