Finite Element Analysis of MB326H Macchi Wing Lower Spar Cap Fatigue Cracks
AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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A three dimensional finite element analysis of cracks in the MB326H Macchi wing lower spar cap is presented. The case of cracks emanating from the intersection of a wing attachment fitting bolt hole and a web attachment fastener hole at wing station Y900 is considered. Stress intensity factors for two proposed crack geometries and the residual strength of the ligament above the web attachment fastener hole in the spar cap flange are calculated. CrackingFracturing, HolesOpenings, Stress intensity factors, Finite element analysis Macchi MB326H aircraft.