Performance evaluation of dual-scale strengthened co-bonded single-lap joints using carbon nanotubes and Z-pins with ANN
Source abstract
Abstract
Abstract Adhesive joining and Z-pinning techniques are commonly used in assembling aerospace composite parts, such as ailerons, spars, ribs, and tails. The current study reports a novel dual-scale approach to synergistically toughen the co-bonded joints (CBJs) by simultaneously loading carbon nanotubes (CNTs) and Z-pins. Shear results depict that combining CNTs and Z-pins creates a synergistic effect owing to inherent and extraneous toughening mechanisms. The results showed that combining CNTs and Z-pins endorses maximum shear strength under tensile loading with a 119.7% improvement compared to unmodified CBJs. The investigation on failure surfaces demonstrates that the dual-strengthening approach changes the sudden failure of CBJs to a steady mode owing to synergistic effects, which include rough assembly region, shear band, crack path variation, and effective linking of Z-pins. Furthermore, a vibration analysis shows that dually reinforced CBJs had higher natural frequencies than other samples. The artificial neural network (ANN) model precisely predicted the failure load with an acceptable margin of error. The results from the ANN, with R 2 values of 0.99507 for training and 0.99492 for the overall model, fall within the permissible error range, indicating that the experimental and ANN outcomes are consistent.
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Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Mechanical Behavior of Composites · Structural Load-Bearing Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham , Amritapuri , India
Centre for Flexible Electronics and Advanced Materials, Amrita Vishwa Vidyapeetham , Amritapuri , India
Mechanical and Industrial Engineering Department, College of Engineering, Qatar University , Doha , Qatar
Department of Mechanical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology , Chennai , 600062, Tamil Nadu , India
Department of Chemistry, Centre for Research and Development, Vinayaka Mission’s Kirupananda Variyar Engineering College, Vinayaka Mission’s Research Foundation (DU) , Salem , 636308, Tamil Nadu , India
Department of Physiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Science (SIMATS), Saveetha University , Chennai , 600077 , India
Department of Mechanical Engineering, Yeshwantrao Chavan College of Engineering , Nagpur , India
Division of Research and Development, Lovely Professional University , Phagwara , India
Department of Civil Engineering, College of Engineering, University of Bisha , P.O. Box 001 , Bisha , 61922 , Saudi Arabia
References (42)
Show source-provided references
1. Li H, Jiang Z, Zhang Q, Zhang H, Zhang J. Improving the mechanical property of continuous fibre reinforced composites by promoting the polymer molecular chain activity. Compos Commun. 2023;38:101518.10.1016/j.coco.2023.101518 ↗
2. Venugopal A, Sudhagar PE. Enhancing shear strength of single lap composite adhesive joint with graphene nanoparticles and Z-pins reinforcement through co-curing technique. Tribol Int. 2024;195:109636.10.1016/j.triboint.2024.109636 ↗
3. Zhang J, Yang T, Du Y, He R, Liu C. Tensile mechanical properties and damage analysis of layered woven GFRP composite bolts. Compos B Eng. 2023;271:111155.10.1016/j.compositesb.2023.111155 ↗
4. Afshin Z, Hosseini Y, Mahdi AS, Alireza Akhavan SL. Impact of the manufacturing process on the flexural properties of laminated composite-metal riveted joints: Experimental and numerical studies. Appl Compos Mater. 2023;31(2):583–610.10.1007/s10443-023-10186-w ↗
5. Catarina A, Akhavan S, Panayiotis T, Carbas RJC, Marques EASL. From fundamental concepts to recent developments in the adhesive bonding technology: A general view. Discov Mech Eng. 2023;2(1):8.10.1007/s44245-023-00014-7 ↗
6. Mohammad Reza K, Soltani P, Reinicke T. Failure and fracture in adhesively bonded 3D-printed joints: An overview on the current trends. Eng Fail Anal. 2023;153:107574.10.1016/j.engfailanal.2023.107574 ↗
7. Karthikeyan N, Naveen J, Rajesh M, Mallikarjuna Reddy D, Sudhagar PE, Norrrahim MNF, et al. Flexural and vibration behaviours of novel covered CFRP composite joints with an MWCNT-modified adhesive. Nanotechnol Rev. 2024;13(1):20240076.10.1515/ntrev-2024-0076 ↗
8. Banea MD, Rosioara M, Carbas RJC, da Silva LFM. Multi-material adhesive joints for automotive industry. Compos B Eng. 2018;151:71–7.10.1016/j.compositesb.2018.06.009 ↗
9. Thulasidhas D, Arumugam S, Rajesh M, Venkatesan R, Sasikumar R, Bandar Ali AA. Evaluating the flexural and vibrational response of carbon nanotube strengthened co-cured sandwich composites. Carbon Lett. 2024;34:1443–52.10.1007/s42823-024-00710-8 ↗
10. Ahmet Ç, Salih A. The effect of fiber length and structure on joint strength in bonded joints with fiber-reinforced composite adhesive. Int J Adhes Adhes. 2023;124:103365.10.1016/j.ijadhadh.2023.103365 ↗
11. Behera RK, Parida SK, Das RR. Effect of using fibre reinforced epoxy adhesive on the strength of the adhesively bonded single lap joints. Compos B Eng. 2023;248:110358.10.1016/j.compositesb.2022.110358 ↗
12. Li S, Liu W, Sun W, Hou S. Effects of adherend notching on the bonding performance of composite single-lap joints. Eng Fract Mech. 2023;281:109141.10.1016/j.engfracmech.2023.109141 ↗
13. Avinash T, Rahul SS. Enhancing the strength of adhesively bonded single-lap composite joints using fiber fabrics. Mater Lett. 2023;357:135664.10.1016/j.matlet.2023.135664 ↗
14. Atahan MG, Apalak MK. Finite element analysis of low-speed oblique impact behavior of adhesively bonded composite single-lap joints. Appl Compos Mater. 2023;30(3):955–85.10.1007/s10443-023-10119-7 ↗
15. Elanur O, Ceylan R, Bora MÖ, Onur Ç, Togayhan K. Effects of double and triple hybrid nanomaterial reinforcements on mechanical performance of aluminium adhesive joints. J Mater Eng Perform. 2023;33(9):4392–407.10.1007/s11665-023-08265-x ↗
16. Mouritz AP. Review of Z-pinned laminates and sandwich composites. Compos A Appl Sci Manuf. 2020;13:106128.10.1016/j.compositesa.2020.106128 ↗
17. Pegorin F, Pingkarawat K, Mouritz AP. Numerical analysis of the heat transfer properties of Z-pinned composites. Compos Commun. 2018;8:14–8.10.1016/j.coco.2018.03.002 ↗
18. Kazaz I, Akpinar S, Ozel A. The effects of thermal cycle and nanostructure reinforcement on the shear load in adhesively bonded joints. Mech Adv Mater Struct. 2018;27(19):1627–38.10.1080/15376494.2018.1522560 ↗
19. Bansal S, Khanna VT, Amrinder PS, Kumar S. Small percentage reinforcement of carbon nanotubes (CNTs) in epoxy (Bisphenol-A) for enhanced mechanical performance. Mater Today Proc. 2022;61:275–9.10.1016/j.matpr.2021.09.225 ↗
20. Hiremath VS, Reddy DM. Influence of GNP nanoparticles on shear and dynamic behaviour of flat-joggle-flat composite joints. Mater Lett. 2023;348:134713.10.1016/j.matlet.2023.134713 ↗
21. Vijaya Rajan V, Gnanavel BK. An experimental investigation on enhancing the strength and stiffness of GFRP co-cured composite joint: Effect of glass powder addition. Mater Res Express. 2022;9(8):085301.10.1088/2053-1591/ac8396 ↗
22. Venugopal A, Edwin Sudhagar P. Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique. Polym Compos. 2023;45(5):4202–20.10.1002/pc.28053 ↗
23. Hiremath VS, Reddy DM, Palaniappan SK, Mutra RR, Siengchin S, Venkatachalam G. Analysis on the effect of sodium hydroxide treatment and graphene nano‐particle reinforcement on the shear behavior and modal analysis of glass fibre reinforced polymer flat‐joggle‐flat composite joints. Polym Compos. 2025;46(6):5494–507.10.1002/pc.29306 ↗
24. Ayatollahi MR, Ahmad Lamei G, Javad M, Hadi K. Mechanical properties of adhesively single lap-bonded joints reinforced with multi-walled carbon nanotubes and silica nanoparticles. J Adhes. 2016;93(11):896–913.10.1080/00218464.2016.1187069 ↗
25. Avinc Akpinar I. The effect of chemical etching and nanostructure additive epoxy coating technique on adhesion strength in aluminum joints bonded with nanostructure additive adhesive. Int J Adhes Adhes. 2024;129:103584.10.1016/j.ijadhadh.2023.103584 ↗
26. Karthikeyan N, Naveen J, Rajesh M, Reddy DM. Secondary bonded and co‐bonded CFRP composite joints with innovative lamination technique: Flexural and failure analysis. Polym Compos. 2025;46(9):8383–93.10.1002/pc.29498 ↗
27. Konstantinos T, Barroso-Caro A, Paolo Andrea C, Vinicius Carrillo B, Floros I, Gamon W, et al. A review on failure theories and simulation models for adhesive joints. J Adhes. 2021;98(12):1855–915.10.1080/00218464.2021.1941903 ↗
28. Chang P, Mouritz AP, Cox BN. Properties and failure mechanisms of Z-pinned laminates in monotonic and cyclic tension. Compos A Appl Sci Manuf. 2006;37(10):1501–13.10.1016/j.compositesa.2005.11.013 ↗
29. Ravindran AR, Ladani RB, Wang CH, Mouritz AP. Hierarchical strengthening of carbon fibre composite T-joints using nanoparticles and Z-pins. Compos A Appl Sci Manuf. 2022;154:106775.10.1016/j.compositesa.2021.106775 ↗
30. Hiremath VS, Reddy DM. Effect of CFRP pin reinforcement and manufacturing technique on shear and dynamic properties of flat-joggle-flat composite joints. Mater Lett. 2024;357:135733.10.1016/j.matlet.2023.135733 ↗
31. Ladani RB, Ravindran AR, Wu S, Pingkarawat K, Kinloch AJ, Mouritz AP, et al. Multi-scale toughening of fibre composites using carbon nanofibres and Z-pins. Compos Sci Technol. 2016;131:98–109.10.1016/j.compscitech.2016.06.005 ↗
32. Dhilipkumar T, Rajesh M. Influence of glass fibre reinforced polymer composite pin reinforcement on shear and dynamic behaviour of composite joint manufactured through co-cure technique. J Compos Mater. 2022;56(12):1799–809.10.1177/00219983221088900 ↗
33. Thulasidhas D, Rajesh M. Influence of manufacturing process and GFRP pin loading on shear and dynamic behaviour of composite joints. J Adhes. 2022;99(4):538–57.10.1080/00218464.2022.2025782 ↗
34. Vaziri A, Nayeb-Hashemi H. Dynamic response of tubular joints with an annular void subjected to a harmonic torsional load. Proc Inst Mech Eng K J Multi-body Dyn. 2002;216(4):361–70.10.1243/146441902320992455 ↗
35. Rajesh M, Pitchaimani J. Mechanical and dynamic mechanical behaviour of novel glass–natural fibre intra-ply woven polyester composites. Sādhanā. 2017;42(7):1215–23.10.1007/s12046-017-0676-y ↗
36. Hocaoğlu M, Karagülle H. Effect of carbon nanotube reinforcement on the natural frequencies and damping ratios of nanocomposite beams. Mater Res Express. 2020;7(2):025021.10.1088/2053-1591/ab721a ↗
37. Dhilipkumar T, Rajesh M. Enhancing shear strength and structural stiffness of composite joint with carbon nanotube reinforced adhesive through co-bonding technique. J Adhes Sci Technol. 2021;36(19):2143–57.10.1080/01694243.2021.2002066 ↗
38. Akpinar S. The strength of the adhesively bonded step-lap joints for different step numbers. Compos B Eng. 2014;67:170–8.10.1016/j.compositesb.2014.06.023 ↗
39. Dhilipkumar T, Rajesh M. Multi-scale strengthening of co-cure joints through multiwall carbon nanotube modified adhesive and GFRP pins. Compos Commun. 2022;29:101056.10.1016/j.coco.2022.101056 ↗
40. Akpinar IA, Gültekin K, Akpinar S, Gürses A, Ozel A. An experimental study on composite adhesives reinforced with different types of organo-clays. J Adhes. 2016;94(2):124–42.10.1080/00218464.2016.1255606 ↗
41. Salih A, İclal Avinc A. Effect of nanostructured reinforcement of adhesive on thermal cycling performance of a single-lap joint with composite adherends. Compos B Eng. 2019;175:107106.10.1016/j.compositesb.2019.107106 ↗
42. Ahmet C, Salih A. Effect of extensometer usage on obtaining the force-displacement curve of the adhesively single lap joint. Eur Mech Sci. 2019;3(4):142–6.10.26701/ems.646610 ↗