Abstract
Ultrasonic spot welding (USSW) is a widely used technique for joining thermoplastics where high frequency, low amplitude vibrations are applied through an ultrasonic horn resting on the polymer surface to create frictional heat, producing a solid state joint between polymer sheets. Advantages such as short weld cycle time, fewer moving components and reproducibility make this technique attractive for automation and industrial use. The goal of this work was to evaluate the feasibility and analyze the lap shear and impact strength of a composite material joint created using ultrasonic spot welding. The base material used for the joints was a composite consisting of a polycarbonate matrix with chopped glass fibers. The strength of the lap joints was determined through experimental lap shear and impact testing. A finite element analysis was conducted for more thorough insight into the stress patterns in the lap joints. Experiments showed that the ultrasonically spot welded joints tested in tensile lap shear loading carried a load 2.3 times higher than adhesive joints and the impact tested joints had an impact strength 3.5 times higher than adhesive joints. The results of this work suggest ultrasonic spot welding as a viable joining method for thermoplastic composite materials.
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References
Hull, D., Clyne, T.W.: An Introduction to Composite Materials. Cambridge University Press, Cambridge (1996)
Yousefpour, A., Hojjati, M., Immarigeon, J.P.: Fusion bonding/welding of thermoplastic composites. J. Thermoplast. Compos. Mater. 17(4), 303–341 (2004)
Vinson, J.R.: Adhesive bonding of polymer composites. Polym. Eng. Sci. 29(19), 1325–1331 (1989)
Banea, M.D., da Silva, L.F.: Adhesively bonded joints in composite materials: an overview. Proc. Inst. Mech. Eng. Part L: J. Mater. Des. Appl. 223(1), 1–18 (2009)
Ageorges, C., Ye, L., Hou, M.: Advances in fusion bonding techniques for joining thermoplastic matrix composites: a review. Compos. A: Appl. Sci. Manuf. 32(6), 839–857 (2001)
Ageorges, C., Ye, L.: Fusion Bonding of Polymer Composites: From Basic Mechanisms to Process Optimization. Springer, London (2002)
Friedrich, K., Almajid, A.A.: Manufacturing aspects of advanced polymer composites for automotive applications. Appl. Compos. Mater. 20(2), 107–128 (2013)
Stavrov, D., Bersee, H.E.N.: Resistance welding of thermoplastic composites—an overview. Compos. A: Appl. Sci. Manuf. 36(1), 39–54 (2005)
Ahmed, T.J., Stavrov, D., Bersee, H.E.N., Beukers, A.: Induction welding of thermoplastic composites—an overview. Compos. A: Appl. Sci. Manuf. 37(10), 1638–1651 (2006)
Benatar, A.: Ultrasonic welding of advanced thermoplastic composites. Doctoral dissertation, Massachusetts Institute of Technology (1987)
Bates, P., Couzens, D., Kendall, J.: Vibration welding of continuously reinforced thermoplastic composites. J. Thermoplast. Compos. Mater. 14(4), 344–354 (2001)
Stokes, V.K.: Joining methods for plastics and plastic composites: an overview. Polym. Eng. Sci. 29(19), 1310–1324 (1989)
Weber, A.: Welding Still Ensures High-Strength Joints (2007, November)
Troughton, M.J.: Handbook of Plastics Joining: A Practical Guide, 2nd edn. William Andrew, Norwich (2008)
The Welding Institute. “Ultrasonic welding of injection moulded components.” TWI. http://www.twiglobal.com/technical-knowledge/job knowledge/ultrasonic-welding-of-injection-moulded-components-part-1-process-and-equipment-061/. Accessed 21 Jul 2016.
Dukane Intelligent Assembly Solutions. “What is Ultrasonic Welding?” Dukane. http://www.dukane.com/us/PPL_whatisUPA.htm. Accessed 21 Jul 2016.
Ensinger Inc. “TECANAT GF20 glass filled PC.” Ensinger. Accessed 21 July 2016. http://www.ensingerinc.com/products.cfm?page=product&product=tecanat+gf20+glass+filled+pc. Accessed 21 Jul 2016.
Hart-Smith, L.: Adhesive-bonded single-lap joints. Technical Report NASA CR 112236 (1973)
Barlow, C., Kumar, V., Flinn, B., Bordia, R., Weller, J.: Impact strength of high density solid-state microcellular polycarbonate foams. J. Eng. Mater. Technol. 123, 229–233 (2001)
Goland, M., Reissner, E.: The stresses in cemented joints. J. Appl. Mech. 11, A17–A27 (1944)
Pace Technologies. “Metallographic Castable Mounting.” Pace Technologies. http://www.metallographic.com/Technical/Castable%20Mount.htm. Accessed 21 Jul 2016.
LeGrand, D.: Handbook of Polycarbonate Science and Technology. Marcel Dekker, New York (2000)
Davis, M.J., Bond, D.A.: The importance of failure mode identification in adhesive bonded aircraft structures and repairs. In: ICCM 12, Paris, France (1999)
Suzuki, K., Ohsawa, I., Uzawa, K., Nagata, K., Matsuo, T., Yamane, M., Takahashi, J. (2012): Joint Efficiency of Ultrasonic Welding of CFRTP (Carbon Fiber Reinforced Thermoplastics) for Structural Applications
Srinivasa, V., Shivakumar, V., Nayaka, V., Jagadeeshaiaih, S., Seethram, M., Shenoy, R., Nafidi, A.: Fracture morphology of carbon fiber reinforced plastic composite laminates. Mater. Res. 13(3), 417–424 (2010)
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Degen, C.M., Kjerengtroen, L., Valseth, E., Newkirk, J.R. (2017). Impact and Lap Shear Properties of Ultrasonically Spot Welded Composite Lap 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_7
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DOI: https://doi.org/10.1007/978-3-319-42426-2_7
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