Skip to the main content

Technical gazette, Vol. 25 No. 6, 2018.

Preliminary communication

https://doi.org/10.17559/TV-20171007105350

Fatigue Life Estimation of Damaged Integral Wing Spar Using XFEM

Khalid Ahmed Eldwaib ; Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade, Serbia
Aleksandar Grbović orcid id orcid.org/0000-0001-9525-4270 ; Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade, Serbia
Aleksandar Sedmak orcid id orcid.org/0000-0002-5438-1895 ; Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade, Serbia
Gordana Kastratović ; Faculty of Transport and Traffic Engineering, University of Belgrade, Vojvode Stepe 305, 11000 Belgrade
Danilo Petrasinović ; Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade, Serbia
Simon Sedmak orcid id orcid.org/0000-0002-2674-541X ; Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11120 Belgrade, Serbia

Full text: english pdf 3.333 Kb

page 1837-1842

downloads: 1.099

cite

Abstract

This paper presents the application of the extended finite element method (XFEM) in crack propagation simulation on the integral wing spar that should replace existing differential spar of the light aircraft UTVA 75. Numerical model of integral spar was developed in software Abaqus. Stress intensity factors (SIFs) were calculated using add-in Morfeo/Crack for Abaqus and obtained number of cycles that would propagate crack to certain length was compared to the experimentally obtained number of cycles for differential spar. Numerical analysis showed that integral spar with the same dimensions as differential spar has significant increase in fatigue life. Analysis that was carried out showed that XFEM could be efficient and cost beneficial tool for simulation of crack propagation in the 3D structures (such as wing spar) and that it should be used in the future for fatigue analysis of newly designed structures in all phases of development and production.

Keywords

crack propagation; fatigue life; stress intensity factor; XFEM

Hrčak ID:

212841

URI

https://hrcak.srce.hr/212841

Publication date:

16.12.2018.

Visits: 2.308 *