An Experimental Evaluation of Static Strength and Fatigue Life on Composite Patch Repaired AA2024-T4 Plate

Abstract:

AA2024-T4 Al substrate with and without bonded E-glass/Epoxy patches were undergone for the experimental study of tensile strength and fatigue behavior. The Al substrates were machined to edge cracked specimens. The strength of the substrate was decreased due to the presence of crack when compared with un-cracked Al substrate. The patches were made in liquid epoxy resin instead of film adhesives and it was discovered that the both static strength and fatigue life were significantly increased for bonded composite patches. Different ply patches were applied on the cracked Al substrates and it was noted that the 9ply patch demonstrated its effectiveness in preventing static failure and increasing fatigue life of the cracked substrates

• Periodical: Advanced Materials Research (Volumes 984-985)
• Pages: 233-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.984-985.233
• Online since: July 2014
• Authors: V. Mathan*, S. Sheeju Selva Roji, J. Jebeen Moses
• Keywords: Aircraft Repair, Bonded Repair, Crack Patching, Fatigue Life, Tensile

References

[1] A.A. Baker, Bonded Composite Repair of Metallic Aircraft Components-Overview of Australian Activities, AGARD – Compos Repair of Military Aircraft Struct (1995) (1) 1-14.

[2] T. E. Tay, F. S. Chau, C. J. Er., Bonded boron-epoxy composite repair and reinforcement of cracked aluminium structures. Compos Struct 34 (1996) 339-347.

DOI: 10.1016/0263-8223(95)00159-x

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

DOI: 10.1016/s0263-8223(00)00011-8

[4] Ki-Hyun Chung, Won-Ho Yang, A study on the fatigue crack growth behavior of thick aluminum panels repaired with a composite patch, Compos Struct 60 (2003) 1–7.

DOI: 10.1016/s0263-8223(02)00338-0

[5] Jones R, Chiu WK, Sawyer JPG, Composite repairs to cracks in thick metallic components. Compos Struct (1999) 44(1): 17–29.

DOI: 10.1016/s0263-8223(98)00108-1

[6] P Poole, A Young, A S Ball, Adhesively Bonded Composite Patch Repair of Cracked Aluminium Alloy Structures, AGARD - Compos Repair of Mil Aircraft Struct. (1995) (3) 1-12.

[7] Wei-Chung Wang, Jiong-Shiun Hsu, Investigation of the size efect of composite patching repaired on edge-cracked plates, Compos Struct. 49 (2000) 415-423.

DOI: 10.1016/s0263-8223(00)00076-3

[8] Cong N. Duong, Chun Hui Wang, Composite repair theory and design, First ed, UK, (2007).

[9] Liyong Tong Adrian, P. Mouritz, Michael K. Bannister, 3D Fibre Reinforced Polymer Composites, First ed, UK, (2002).

DOI: 10.1016/b978-008043938-9/50012-0

[10] H. Hosseini-Toudeshky, G. Sadeghi , H.R. Daghyani, Experimental fatigue crack growth and crack-front shape analysis of asymmetric repaired aluminium panels with glass/epoxy composite patches, Compos Struct. 71 (2005) 401-406.

DOI: 10.1016/j.compstruct.2005.09.032

[11] H. Hosseini-Toudeshky, Effects of composite patches on fatigue crack propagation of single-side repaired aluminum panels. Compos Struct. 76 (2006) 243-251.

DOI: 10.1016/j.compstruct.2006.06.028

[12] R. Jones, S. Barter, L. Molent, S. Pitt, Crack patching: an experimental evaluation of fatigue crack growt, Compos Struct. 67 (2005) 229–238.

DOI: 10.1016/j.compstruct.2004.09.020

[13] Q.Y. Wang, R.M. Pidaparti, Static characteristics and fatigue behavior of composite-repaired aluminum plates, Compos Struct. 56 (2002) 151-155.

DOI: 10.1016/s0263-8223(01)00176-3

[14] Klug JC, Maley S, Sun CT, Characterization of fatigue behavior of bonded composite repairs. J Aircraft. (1999) 36(6) 1016–22.

DOI: 10.2514/2.2543

[15] Emin Ergun, Süleyman Tasgetiren, Muzaffer Tocu, Fatigue and fracture analysis of aluminum plate with composite patches under the hygrothermal effect, Compos Struct, 92 (2010) 2622–2631.

DOI: 10.1016/j.compstruct.2010.03.015