PSI - Issue 14

K. Shridhar et al. / Procedia Structural Integrity 14 (2019) 375–383 Author name / Structural Integrity Procedia 00 (2018) 000–000

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 For the radius ratio=3, the number of cycles to failure is found to be 36, 34,386cycles.  For the given loading, lug with radius ratio 3 has higher fatigue life than lug with radius ratio 1.5. From this it can be concluded that fatigue crack growth rate is higher in lugs with lesser radius ratios.

Acknowledgements The authors thank Director, NAL, and the Head, STTD, NAL, Bangalore for their support and encouragement during this work. The Principal and Head, Department of Mechanical Engineering, B.M.S College of Engineering, is thanked for their support during the course of this work. References J.C. Ekvall., 1986.Static strength analysis of pin-loaded lugs. Journal of Aircraft 23,pp.438-443. Schijve.j.,Hoeymakers., 1979.Fatigue crack growth in lugs.Fatigue of Engineering Materials and Structures1,pp.185-201. Elber.W.,1971.The significance of fatigue crack closure, In: Damage tolerance in aircraft structure. American Society for Testing and Materials, pp.230-242. Walker.E.K.,1970.The effect of stress ratio during crack propagation and fatigue for 2024-T3 and 7076-T6 aluminum, In: Effect of environment and complex load history on fatigue life.American Society for Testing and Materials,pp.1-14. R.J. Grant., J. Smart.and P. Stanley,.1994.A parametric study of the elastic stress distribution in pin-loaded lugs.,Journal of Strain Analysis 29,pp.299–307. Boljanovic Slobodanka., Maksimovic Stevan., 2014.Fatigue crack growth modeling of attachment lugs.International Journal of Fatigue Boljanovic. S., Maksimovic. S., Carpinteri.A.,2013. Fatigue life evaluation of damaged aircraft lugs.Scientific Technical Review63, pp.3-9. Maksimovic M., Nikolic-Stanojevic V., Maksimovic K., Stupar.S.J., 2012.Damage tolerance analysis of structural components under general load spectrum.Technical Gazette 19, pp. 931-938, Naderi M., Iyyer N.,2015.Fatigue life prediction of cracked attachment lugs using XFEM. International Journal of Fatigue77, p.186-193. J. Gilbert Kaufman.,2001.Fracture Resistance of Aluminum Alloys. United States of America: ASM International,pp.98-103. Michael Bauccio.,1993.ASM Metals Reference Book.Third edition, ASM International,Materials Park.