Tehnički vjesnik, Vol. 19 No. 4, 2012.
Izvorni znanstveni članak
Damage tolerance analysis of structural components under general load spectrum
Mirko Maksimović
; Water supply and Sewerage, Belgrade, Serbia
Vera Nikolić-Stanojević
; State University of Novi Pazar, Vuka Karadzica bb, 36300 Novi Pazar, Serbia
Katarina Maksimović
; Republic Serbia, City Administration of City of Belgrade, Secretariat for Utilities and Housing Services Water Management, Kraljice Marije 1, Belgrade, Serbia
Slobodan Stupar
; Faculty of Mechanical Engineering, Belgrade, Serbia
Sažetak
In this investigation fatigue behaviour of damaged structural components under cyclic loads constant amplitude and load spectrum is considered. Primary attention of this investigation is the establishment of computation procedure for the evaluation of the residual life of aircraft attachment lug type structural elements in the presence of initial cracks. In this investigation for residual life estimation and crack growth analysis Strain Energy Density (SED) method is used. The SED method uses the low-cycle fatigue (LCF) properties of the material in crack growth analysis. In this approach experimentally obtained dynamic properties of the material such as Forman’s constants are not required when this method is concerned. The complete computation procedure for the crack propagation analysis using low-cycle fatigue material properties is illustrated with the damaged structural elements. To determine analytic expressions for stress intensity factors (SIF) singular finite elements are used. Results of numerical simulation for crack propagation based on strain density method have been compared with own experimental results.
Ključne riječi
fatigue; residual life; cracked structural elements; aircraft attachment lugs; low-cycle fatigue properties; finite elements
Hrčak ID:
93568
URI
Datum izdavanja:
12.12.2012.
Posjeta: 2.849 *