Abstract
There is a great variety of joint types used in nature, from jaws, bones and tendons to root systems and tree branches. To understand how to optimise biomimetic-inspired engineering joints, first it is important to understand how biological joints work. In this paper, a review based on the functions of natural joint systems is presented. Emphasis was given to understanding natural joints from a mechanical point of view, so as to inspire engineers to find innovative methods of joining man-made structures. Nature has found many ingenious ways of joining dissimilar materials, with a transitional zone of stiffness at the insertion site commonly used. In engineering joints, one way to reduce the material stiffness mismatch is to gradually decrease the effective stiffness of the steel part of the joint by perforating it with holes. This paper investigates joining of flat perforated steel plates to a CFRP part by a co-infusion resin transfer moulding process. The joints are tested under static tensile loading. The perforated steel joints show a 175 % increase of joint strength comparing to non-perforated ones. Finite element analyses are used to interpret the experimental results.
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Banea, M.D., da Silva, L.F.M.: Adhesively bonded joints in composite materials: an overview. J. Mater. Des. Appl. 223, 1–18 (2009)
Campilho, R.D.S.G., Banea, M.D., Neto, J.A.B.P., da Silva, L.F.M.: Modelling of single-lap joints using cohesive zone models: effect of the cohesive parameters on the output of the simulations. J. Adhesion 88, 513–533 (2012)
Anyfantis, K.N.: Finite element predictions of composite-to-metal bonded joints with ductile adhesive materials. Compos. Struct. 94, 2632–2639 (2012)
Anyfantis, K.N., Tsouvalis, N.G.: Loading and fracture response of CFRP-to-steel adhesively bonded joints with thick adherents—Part I: experiments. Compos. Struct. 96, 850–857 (2013)
Anyfantis, K.N., Tsouvalis, N.G.: Loading and fracture response of CFRP-to-steel adhesively bonded joints with thick adherents—Part II: numerical simulation. Compos. Struct. 96, 858–868 (2013)
Avgoulas, E.I., Sutcliffe, M.P.F.: Biomimetic-inspired joining of composite with metal structures: a survey of natural joints and application to single lap joints. In: Proceedings of the SPIE Smart Structures and Materials: Bioinspiration, Biomimetics, and Bioreplication IV, San Diego, CA, 9–13 March 2014
Unden, H., Ridder, S.O.: Load-introducing armature as component part of a laminated structural element US Patent 4,673,606, 13 Feb 1985
Melogranaa, D.J., Grenestedt, L.J.: Improving joints between composites and steel using perforations. Compos. Part A: Appl. Sci. Manuf. 33, 1253–1261 (2002)
Cao, J., Grenestedt, L.: Design and testing of joints for composite sandwich/steel hybridic ship hulls. Compos. Part A: Appl. Sci. Manuf. 35, 1091–1105 (2004)
Burns, L.A., Mouritz, A.P., Pook, D., Feih, S.: Bio-inspired design of aerospace composite joints for improved damage tolerance. Compos. Struct. 94, 995–1004 (2012)
Mattheck, C., Bethge, K.: The structural optimisation of trees. Naturwissenschaften 85, 1–10 (1998)
Burns, L.A., Mouritz, A.P., Pook, D., Feih, S.: Strength improvement to composite T-joints under bending through bio-inspired design. Compos. Part A: Appl. Sci. Manuf. 43, 1971–1980 (2012)
Benjamin, M., Toumi, H., Ralphs, J.R., Bydder, G., Best, T.M., Milz, S.: Where tendons and ligaments meet bone: attachment sites (‘entheses’) in relation to exercise and/or mechanical load. J. Anat. 208, 471–490 (2006)
Thomopoulos, S., Genin, G.M., Galatz, L.M.: The development and morphogenesis of the tendon-to-bone insertion—What development can teach us about healing. J. Musculoskelet. Neuronal Interact. 10(1), 35–45 (2010)
Benjamin, M., Kumai, T., Milz, S., Boszczyk, B.M., Boszczyk, A.A., Ralphs, J.R.: The skeletal attachment of tendons-tendon ‘entheses’. Comp. Biochem. Physiol. A Mol. Integr. Physiol. 133(4), 931–945 (2002)
Lu, H.H., Thomopoulos, S.: Functional attachment of soft tissues to bone: development, healing, and tissue engineering. Annu. Rev. Biomed. Eng. 15, 201–226 (2013)
Waite, J.H., Lichtenegger, H.C., Stucky, G.D., Hansma, P.: Exploring molecular and mechanical gradients in structural bioscaffolds. Biochemistry 43(24), 7653–7662 (2004)
Vincent, J.F.V.: Structural Biomaterials. Princeton University Press, Princeton, NJ (1990)
Suresh, S.: Graded materials for resistance to contact deformation and damage. Science 292, 2447–2451 (2001)
Campilho, R.D.S.G., Banea, M.D., Pinto, A.M.G., da Silva, L.F.M., de Jesus, A.M.P.: Strength prediction of single- and double-lap joints by standard and extended finite element modelling. Int. J. Adhes. Adhes. 31, 363–372 (2011)
Avgoulas, E.I., Sutcliffe, M.P.F.: Numerical and experimental investigation of CFRP to perforated steel joints. In: Proceedings of the 20th International Conference on Composite Materials, Copenhagen, Denmark, 9–24 July 2015
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The authors acknowledge the financial support provided by the Engineering and Physical Sciences Research Council (EPSRC) and Dowty Propellers (part of GE Aviation).
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Avgoulas, E.I., Sutcliffe, M.P.F. (2017). Review of Natural Joints and Bio-Inspired CFRP to Steel joints. In: Cloud, G., Patterson, E., Backman, D. (eds) Joining Technologies for Composites and Dissimilar Materials, Volume 10. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-42426-2_5
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DOI: https://doi.org/10.1007/978-3-319-42426-2_5
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