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Fatigue Analysis of Pre-cracked Aluminium Alloy Thin Sheets Repaired with a CFRP Patch at Elevated Temperature

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Abstract

The effect of fatigue life was studied at an elevated temperature of 80 °C of a centre pre-cracked specimen of aluminium alloy 6061-T6, repaired with a unidirectional carbon fibre-reinforced plastic (CFRP) patch. The patch was bonded only on one face of the aluminium alloy skin and tested under tension–tension fatigue load with a stress ratio of 0.1 and a frequency of 10 Hz. The performance of the two kinds of CFRP patches was studied with three-ply and five-ply patches. The fatigue life of pre-cracked bare specimen was improved substantially by bonding the CFRP patches. The performance of five-ply patch was significantly better than the three-ply patch. At low applied loads, the repaired specimen of both kinds failed with the growth of the crack tips all the way to the specimen edges. At high loads, the initial growth of fatigue crack was observed for few millimetres and the specimen failed due to the separation of the patch. At low loads and elevated temperature, the fatigue life was increased substantially over those of tests conducted at room temperature. However, at high loads, the failure life at elevated temperature was decreased significantly.

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References

  1. A.A. Baker, R.J. Callinan, M.J. Davis, R. Jones, J.G. Williams, Repair of MIRAGE III aircraft using the BFRP crack patching technique. Theor. Appl. Fract. Mech. 2, 1–15 (1984)

    Article  Google Scholar 

  2. A.A. Baker, Fibre composite repair of cracked metallic aircraft components- practical and basic aspects. Composites 18(4), 293–308 (1987)

    Article  Google Scholar 

  3. A. Baker, Bonded composite repair of fatigue-cracked primary aircraft structure. Compos. Struct. 47, 431–443 (1999)

    Article  Google Scholar 

  4. Z. Domazet, Comparison of fatigue crack retardation methods. Eng. Fail. Anal. 3(2), 137–147 (1996)

    Article  Google Scholar 

  5. P.S. Shinde, V.K. Tripathi, K.K. Singh, P.K. Sarkar, P. Kumar, Reduction in stress intensity factor of a compact tension, specimen by bonding symmetrical GFRP patches. J. Inst. Eng. India Ser. C 94(3), 239–244 (2013). https://doi.org/10.1007/s40032-013-0074-0

    Article  Google Scholar 

  6. A. Rasane, P. Kumar, M. Khond, Analysis of the failure of bonded interface between aluminium skin and FRP patch using cohesive zone model. J. Inst. Eng. India Ser. C (2018). https://doi.org/10.1007/s40032-018-0490

    Article  Google Scholar 

  7. P. Kumar, P.S. Shinde, G. Bhoyar, Fracture toughness and shear strength of the bonded interface between an aluminium alloy skin and a FRP patch. J. Inst. Eng. India Ser. C (2018). https://doi.org/10.1007/s40032-018-0467-1

    Article  Google Scholar 

  8. P.B. Rao, A.R. Krishna, K. Ramji, A.S. Devi, Experimental investigations on fatigue damage and residual properties of interacting notched woven E-Glass/epoxy composite. J. Inst. Eng. India Ser. C 96(4), 381–388 (2015)

    Google Scholar 

  9. A. Okafor, N. Singh, U.E. Enemuoh, S.V. Rao, Design, analysis and performance of adhesively bonded composite patch repair of cracked aluminium aircraft panels. Compos. Struct. 71, 258–270 (2005)

    Article  Google Scholar 

  10. J.A. Pascoe, R.C. Alderliesten, R. Benedictus, Methods for the prediction of fatigue delamination growth in composites and adhesive bonds—a critical review. Eng. Fract. Mech. 112–113, 72–96 (2013)

    Article  Google Scholar 

  11. F. Benyahia, L. Aminallah, A. Albedah, B. Bachir Bouiadjra, T. Achour, Experimental and numerical analysis of bonded composite patch repair in aluminum alloy 7075 T6. Mater. Design 73, 67–73 (2015)

    Article  Google Scholar 

  12. B.B. Bouiadjra, F. Benyahia, A. Albedah, B.A.B. Bouiadjra, S.M.A. Khan, Comparison between composite and metallic patches for repairing aircraft structures of aluminum alloy 7075 T6. Int. J. Fatigue 80, 128–135 (2015)

    Article  Google Scholar 

  13. J. Aakkula, O. Saarela, An experimental study on the fatigue performance of CFRP and BFRP repaired aluminium plate. Compos. Struct. 118, 589–599 (2014)

    Article  Google Scholar 

  14. A. Albedah, S.M.A. Khan, F. Benyahia, B.B. Bouiadjra, Experimental analysis of the fatigue life of repaired cracked plate in aluminum alloy 7075 with bonded composite patch. Eng. Fract. Mech. 145, 210–220 (2015)

    Article  Google Scholar 

  15. A. Albedah, S.M.A. Khan, F. Benyahia, B.B. Bouiadjra, Effect of load amplitude change on the fatigue life of cracked Al plate repaired with composite patch. Int. J. Fatigue 88, 1–9 (2016)

    Article  Google Scholar 

  16. M. Usman, J.A. Pascoe, R.C. Alderliesten, R. Benedictus, The effect of temperature on fatigue crack growth in FM94 epoxy adhesive bonds investigated by means of energy dissipation. Eng. Fract. Mech. 189, 98–109 (2017)

    Article  Google Scholar 

  17. A.K. Syed, X. Zhang, J.E. Moffatt, M.E. Fitzpatrick, Effect of temperature and thermal cycling on fatigue crack growth in aluminium reinforced with GLARE bonded crack retarders. Int. J. Fatigue 98, 53–61 (2017)

    Article  Google Scholar 

  18. H. Hosseini-Toudeshky, M. Sadighi, A. Vojdani, Effects of curing thermal residual stresses on fatigue crack propagation of aluminum plates repaired by FML patches. Compos. Struct. 100, 154–162 (2013)

    Article  Google Scholar 

  19. E. Ergun, S. Tasgetiren, M. Topcu, Fatigue and fracture analysis of aluminum plate with composite patches under the hygrothermal effect. Compos. Struct. 92, 2622–2631 (2010)

    Article  Google Scholar 

  20. P. Feng, H. Lili, L. Xiao-Ling Zhao, S.X. Cheng, Study on thermal effects on fatigue behavior of cracked steel plates strengthened by CFRP sheets. Thin Walled Struct. 82, 311–320 (2014)

    Article  Google Scholar 

  21. A. Vlot, J.M.A. Massar, C.B. Guijt, S. Verhoeven, Bonded aircraft repairs under variable amplitude fatigue loading and at low temperatures. Fatigue Fract. Eng. Mater. Struct. 23, 9–18 (2000)

    Article  Google Scholar 

  22. Y. Okamoto, T. Kamizono, N. Namiki, H. Cai, Environmental fatigue test of bonded composite patch repaired metallic structure. Asia-Pacific Conference on FRP in structures, pp. 1025–1031 (2007)

  23. P.S. Shinde, P. Kumar, V.K. Tripathi, Dependence of repair strength on the size of FRP patch bonded to a cracked aluminum alloy panel. Thin Walled Struct. 124, 211–303 (2018)

    Article  Google Scholar 

  24. P.S. Shinde, P. Kumar, K.K. Singh, V.K. Tripathi, P.K. Sarkar, The role of yield stress on cracked thin panels of aluminum alloys repaired with a FRP patch. J. Adhes. 93(5), 412–429 (2017)

    Article  Google Scholar 

  25. P.S. Shinde, P. Kumar, K.K. Singh, V.K. Tripathi, P.K. Sarkar, Experimental study of CFRP patches bonded on a cracked aluminum alloy panel. Compos. Interfaces 22(4), 233–248 (2015)

    Article  Google Scholar 

  26. A. Gilat, R.K. Goldberg, G.D. Roberts, Strain rate sensitivity of epoxy resin in tensile and shear loading. J. Aerosp. Eng. 20(2), 75–89 (2007)

    Article  Google Scholar 

  27. G.E. Dieter, D. Bacon, in Mechanical Metallurgy, McGraw-Hill Series in Material Science and Engineering, 3rd edn., eds. by M.B. Bever, S.M. Copley, M.E. Shank, C.A. Wert, G.L. Wilkes (McGraw-Hill Book Company, New York, 1988), pp. 375–383. ISBN-10: 0-07-100406-8

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Acknowledgements

This work is carried out with the help of research grant from ARDB (Aeronautical Research and Development Board), DRDO, New Delhi, for the project “Fatigue growth characterization at cold and elevated temperatures of thin aluminium alloy panel repaired with polymer composite patches”.

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  1. Department of Mechanical Engineering, College of Engineering Pune, Shivajinagar, Pune, 411005, Maharashtra, India

    Hanmant Shinde, Prashant Kumar, Madhuri Karnik, Prakash Shinde & Amar Todkar

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  1. Hanmant Shinde
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  2. Prashant Kumar
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  3. Madhuri Karnik
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Shinde, H., Kumar, P., Karnik, M. et al. Fatigue Analysis of Pre-cracked Aluminium Alloy Thin Sheets Repaired with a CFRP Patch at Elevated Temperature. J. Inst. Eng. India Ser. C 101, 303–311 (2020). https://doi.org/10.1007/s40032-019-00547-5

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