Effect of the patch length on the effectiveness of one-sided bonded composite repair for aluminum panels
Source abstract
Abstract
Abstract This study analyzes the effect of the patch length the repair performance of bonded composite repair. Experimental and numerical approaches are used. In the experimental part of the study, fatigue tests with a constant amplitude were performed on notched specimens of 2024 T3 and 7075 T6 aeronautical aluminum alloys. Two stress ratios of R = 0 and R=0.1 were applied. The value of the patch length was varied to highlight its effect on the fatigue life. In the numerical part, the stress intensity factor and adhesive stresses were computed for different sizes of the patch length. The experimental results show that the fatigue life of repaired plates is significantly reduced with increases in patch length irrespective of the type of aluminum alloy and the stress ratio. The numerical results show that the stress intensity factor increases with increases in the patch length, and this is in agreement with the experimental results. This effect is explained by the presence of a secondary bending moment generated by the application of a single sided composite patch.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Fatigue and fracture mechanics · Structural Load-Bearing Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
Show source-provided references
1. On the USAF ‘risk of failure’ approach and its applicability to composite repairs to metal airframes10.1016/j.compstruct.2017.01.075 ↗
2. Restoration of the mechanical performance of damaged Al panels using bonded composite repair patches10.1016/j.ijadhadh.2013.01.003 ↗
3. Advances in the proof test for certification of bonded repairs – Increasing the technology readiness level10.1016/j.ijadhadh.2015.10.008 ↗
4. Modeling and validation of composite patch repair to cracked thick and thin metallic panels10.1016/j.compositesa.2008.08.007 ↗
5. Nonlinear analysis and damage monitoring of a one-sided patch repair with delamination10.1016/j.compstruct.2005.02.013 ↗
6. Damage tolerance of bonded aircraft structures10.1016/j.ijfatigue.2008.05.001 ↗
7. Experimental and numerical analysis of bonded composite patch repair in aluminum alloy 7075 T610.1016/j.matdes.2015.02.009 ↗
8. Analysis of the disbond effect on the stress intensity factor variation for repaired cracks with bonded composite patch. Proceedings of the Institution of Mechanical Engineers
9. Pulsed thermography for non-destructive evaluation and damage growth monitoring of bonded repairs10.1016/j.compstruct.2008.02.010 ↗
10. Effects of the adhesive disband on the performances of bonded composite repairs in aircraft structures10.1016/j.matdes.2011.12.028 ↗
11. Computation of the stress intensity factors for repaired cracks with bonded composite patch in mode I and mixed mode10.1016/S0263-8223(02)00023-5 ↗
12. Fatigue life evaluation of adhesively bonded scarf joints10.1016/j.ijfatigue.2011.08.018 ↗
13. Optimization of the sizes of bonded composite repair in aircraft structures10.1016/j.matdes.2012.04.025 ↗
14. Influence of water ingress onto the crack propagation rate in a AA2024-T3 plate repaired by a carbon/epoxy patch10.1016/j.ast.2016.06.010 ↗
15. Analytical methods for designing composite repairs
16. A genetic algorithm applied to optimisation of patch repair for cracked plates10.1016/j.cma.2006.07.004 ↗
17. Three dimensional stress analysis of a composite patch using stress functions10.1016/j.ijmecsci.2010.08.006 ↗
18. Thermal stresses in plate with a circular reinforcement10.1016/S0020-7683(99)00175-4 ↗
19. Comparison between rectangular and trapezoidal bonded composite repairs in aircraft structures: a numerical analysis10.1016/j.matdes.2011.02.053 ↗
20. Numerical analysis of the patch shape effects on the performances of bonded composite repair in aircraft structures10.1016/j.compositesb.2011.08.047 ↗
21. Analysis of cracked adhesively bonded laminated structures10.2514/3.61263 ↗
22. Neutral axis offset effects due to crack patching10.1016/0263-8223(83)90010-7 ↗
23. Linear coupled bending and extension of an unbalanced bonded repair10.1016/j.ijsolstr.2006.09.012 ↗
24. Experimental analysis of the fatigue life of repaired cracked plate in aluminum alloy 7075 with bonded composite patch10.1016/j.engfracmech.2015.04.008 ↗
25. Pook · 2000
26. Bonded composite patch geometry effects on fatigue crack growth in thin and thick aluminum panels
27. Investigation of a cracked thick aluminum panel repaired with a bonded composite patch10.1016/S0013-7944(99)00032-6 ↗
28. of the adhesive failure in bonded composite repair of aircraft structures using modified damage zone theory10.1016/j.matdes.2013.03.017 ↗