Effect of stiffness variation in the adhesive on performance of composite-metal tubular joints
Topic(s) : Material and Structural Behavior - Simulation & Testing
Co-authors :
Olufemi TAYLOR (UNITED KINGDOM), Maria KASHTALYAN (UNITED KINGDOM), Mehmet KARTALAbstract :
Reliable joining of fibre-reinforced polymer-matrix composites to metals remains one of the technological challenges to overcome when developing multi-material structures. Bio-inspired concepts such as surface patterning [1], adherend grading [2] and 3D printed metals pins [3], to name but a few, are currently actively explored in metal-composite joint design with the view to achieve enhancements in joint strength and maximise recyclability.
In this study, 2D (axisymmetric) and 3D finite element models of bio-inspired tubular metal-composite single lap adhesive joints are developed in Abaqus to study the effects of stiffness variation in the adhesive on joint performance. Axial tension, torsion and internal pressure or combined loadings are considered. Stiffness variation in the adhesive is implemented via the user defined field subroutine, while cohesive zone model is employed for failure analysis and failure load prediction. Comprehensive parametric studies are facilitated via Python scripting. The developed models were extensively validated for different loading scenarios using results in the literature, including [4, 5].
Several U-shaped profiles of stiffness variation in the adhesive have been examined and compared with a reference joint configuration without stiffness variation. Investigated joint configurations have been shown to reduce asymmetry of stress distributions in the adhesive layer and displayed increased joint strength in comparison with the reference joint configuration. Stiffness variation profile in the adhesive is found to play a major role in joint performance. The results demonstrate that a combination of overlap length and stiffness variation profile in the adhesive can delay failure and improve joint performance.
[1] Hamilton A, Xu Y, Kartal ME, Kumar S, Gadegaard N, Mulvihill DM (2023) Optimisation of interlocking microstructured adhesive joints via finite element modelling, design of experiments and 3D printing. International Journal of Adhesion and Adhesives, 120, 103292
[3] dos Reis MQ, Marques EAS, Carbas RJC, da Silva LFM (2020) Functionally graded adherends in adhesive joints: An overview. Journal of Advanced Joining Processes, 2, 100033
[3] Bagnato T, Ravindran AR, Mirabedini A, Ladani RB, Kandare E, Orifici AC, Chang P, Wang J, Mouritz A (2023) Superior interfacial toughening of hybrid metal-composite structural joints, Composites Part A, 168, 107479
[4] Barbosa DR, Campilho RDSG, Rocha RJB, Ferreira LRF (2019) Experimental and numerical assessment of tensile loaded tubular adhesive joints. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 233, 452-464
[5] Khan MA, Kumar S (2017) Mitigating edge effects in adhesively bonded composite tubular lap joints under axial, pressure and torsional loading via stiffness tailoring, 21th International Conference on Composite Materials (ICCM21), Xi’an, 20-25th August 2017
In this study, 2D (axisymmetric) and 3D finite element models of bio-inspired tubular metal-composite single lap adhesive joints are developed in Abaqus to study the effects of stiffness variation in the adhesive on joint performance. Axial tension, torsion and internal pressure or combined loadings are considered. Stiffness variation in the adhesive is implemented via the user defined field subroutine, while cohesive zone model is employed for failure analysis and failure load prediction. Comprehensive parametric studies are facilitated via Python scripting. The developed models were extensively validated for different loading scenarios using results in the literature, including [4, 5].
Several U-shaped profiles of stiffness variation in the adhesive have been examined and compared with a reference joint configuration without stiffness variation. Investigated joint configurations have been shown to reduce asymmetry of stress distributions in the adhesive layer and displayed increased joint strength in comparison with the reference joint configuration. Stiffness variation profile in the adhesive is found to play a major role in joint performance. The results demonstrate that a combination of overlap length and stiffness variation profile in the adhesive can delay failure and improve joint performance.
[1] Hamilton A, Xu Y, Kartal ME, Kumar S, Gadegaard N, Mulvihill DM (2023) Optimisation of interlocking microstructured adhesive joints via finite element modelling, design of experiments and 3D printing. International Journal of Adhesion and Adhesives, 120, 103292
[3] dos Reis MQ, Marques EAS, Carbas RJC, da Silva LFM (2020) Functionally graded adherends in adhesive joints: An overview. Journal of Advanced Joining Processes, 2, 100033
[3] Bagnato T, Ravindran AR, Mirabedini A, Ladani RB, Kandare E, Orifici AC, Chang P, Wang J, Mouritz A (2023) Superior interfacial toughening of hybrid metal-composite structural joints, Composites Part A, 168, 107479
[4] Barbosa DR, Campilho RDSG, Rocha RJB, Ferreira LRF (2019) Experimental and numerical assessment of tensile loaded tubular adhesive joints. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 233, 452-464
[5] Khan MA, Kumar S (2017) Mitigating edge effects in adhesively bonded composite tubular lap joints under axial, pressure and torsional loading via stiffness tailoring, 21th International Conference on Composite Materials (ICCM21), Xi’an, 20-25th August 2017