Investigation of the Effect of Fiber Reinforcement on Adhesively Repaired Composite Plates

Abstract

In this study; fiber reinforcement effect on the circular hole perforated adhesively patch repaired woven glass fiber reinforced composite plates investigated with experimental study. The 8 layered woven glass fiber reinforced composite plates were using as composite plates and external patch. The fiber reionforcement angle of composite and external patch were changed as 0o, 15o, 30o and 45o. The circular hole in the center of composite plate was repaired with external patch and Loctite 9466 adhesive. The failure load was determined with static tensile tests. The repair performance was compared with un-perforated and un-repaired composite plates failure strength. As a result of the experimental studies; it was determined that the applied repair treatment increased the failure loads by 34% to 102% compared to notched plates. In addition, it was determined that the change in the patch fiber reinforcement angle was more effective on the failure loads. The largest failure loads were obtained for the plate repaired with a 30o fiber reinforcement angle patch compared to the notched plates.

Keywords

• Adhesively repair of composite
• Fiber reinforce angle
• Failure nalysis

Yapıştırıcı ile Onarılmış Kompozit Plakalarda Fiber Takviyesinin Etkisinin Araştırılması

Abstract

In this study; fiber reinforce effect on the circular hole perforated adhesively patch repaired wowen glass fiber reinforced composite plates investigated with experimental study. The 8 layered woven glass fiber reinforced composite plates were using composite plates and external patch. The fiber reionforce angle of composite and external patch were changed as 0o, 15o, 30o and 45o. The circular hole in the center of composite plates were repaired with external patch and Loctite 9466 adhesive. The faliure load was determined with extension tests. The repair performance was compared with un-perforated and un-repaired composite plates failure strength. As a result of the experimental studies; it was determined that the applied repair treatment increased the failure loads by 34% to 102% compared to notched plates. In addition, it was determined that the change in the patch fiber reinforcement angle was more effective on the failure loads. The largest failure loads were obtained for the plate repaired with a 30o fiber reinforcement angle patch compared to the notched plates.

Keywords

• Kompozit malzemelerin yapışma yolu ile tamiri
• fiber takviye açısı
• hasar analizi

References

1. [1] A. Albedah, K. Mohammed, S. M. A. Bouiadjra, B.A. B., Bouiadjra, F. Benyahia, “Effect of the patch length on the effectiveness of one-sided bonded composite repair for aluminum panels,” International Journal of Adhesion and Adhesives, vol. 81, pp. 83–89, 2018.
2. [2] P.C. Tse, K.J. Lau, W.H. Wong, “Stress and failure analysis of woven composite plates with adhesive patch-reinforced circular hole,” Composites Part B., Vol 33, pp. 54-65, 2002.
3. [3] B. Mohamed, K. Amari, L. Belkaddour, “Effect of the fibers orientation of the different types of composite plates notched of U-shape repaired by composite patch,” Materials Research, vol. 26, pp. 1-11, 2023.
4. [4] S. Aminallah, K. Madani, M. Benyettou, M.S.N. Boussahra, M. W. Harmel, R.D.S.G. Campilho, “Numerical analysis of composite patch repairs on damaged plates with optimized geometric modifications for improved fracture strength,” Mechanics of Advanced Materials and Structures, vol. 32, pp.1-20, 2025.
5. [5] S. Yashiro, A. Akada, S. Onodera, “Variable stiffness composite patch for single-sided bonded repair of composite structures” Advanced Composite Materials, vol.34, no. 3, pp. 495–512, 2025.
6. [6] J. Huang, R.T Haftka, “Optimization of fiber orientations near a hole for increased load-carrying capacity of composite laminates,” Structural and Multidisciplinary Optimization, vol. 30, no. 4, pp. 335–341, 2025.
7. [7] A. Aabid, M. Hrairi, J.S.M. Ali, “Optimization of composite patch repair for center-cracked rectangular plate using design of experiments method,” Materials Today: Proceedings, vol. 27, no. 2, pp. 1713-1719, 2020.
8. [8] D. Du, Y. Hu, H. Li, C. Liu, J. Tao, “Open-hole tensile progressive damage and failure prediction of carbon fiber-reinforced PEEK-titanium laminates,” Composites Part B: Engineering, vol. 91, pp. 65-74, 2016.

9. [9] M.O. Kaman, F. Çetişli, “Effect of fiber orientation angle on patch repaired composite plates,” Materials Testing, vol. 63, pp: 436-441, 2021.
10. [10] P. Cheng, X.J. Gong, D. Hearn, S. Aivazzadeh, “Tensile behaviour of patch-repaired CFRP laminates,” Composite Structures, vol. 93, no. 2, pp. 582-589, 2011.
11. [11] X. Liu, G. Wang, “Progressive failure analysis of bonded composite repairs,” Composite Structures, vol. 81, no. 3, pp. 331-340, 2007.
12. [12] K. Monika, S. B. Gursahib, A. Arockiarajan, “Nonlinear progressive damage model for woven patch-repaired laminate composites,” Composite Structures, vol. 320, no. 15, pp. 117154 – 117181, 2023.
13. [13] X.J. Gong, P. Cheng, S. Aivazzadehc, X. Xiao, “Design and optimization of bonded patch repairs of laminated composite structures,” Composite Structures, vol. 123, pp. 292–300, 2015.
14. [14] A. Çelik, K. Turan, Y. Arman, “Investigation of patch application failure behaviors according to fiber orientation difference at notched composite plates, Mechanics of advanced materials and structures,” vol. 31, no. 30, pp. 13425–13435, 2024.
15. [15] K. Turan, “Kompozit malzemelerde yapışma bağlantılarının mukavemeti üzerine yama fiber takviye açısı etkisi,” Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi, vol. 7, no. 1, pp: 129-138, 2016.