Title: Characterization of Adhesion Between Dissimilar Polymer-Matrix Composites

Authors: Diana G. Heflin, Joshua Dustin, and Jan-Anders E. Mansson

DOI: 10.33599/nasampe/s.19.1504

Abstract: Epoxy-matrix composites are highly brittle and tend to fail catastrophically, which can be dangerous and costly. Therefore an area of great potential in composite manufacture is improving the toughness—that is, the energy absorption ability, of the polymer matrix. Including a second, less brittle polymer phase can increase the toughness of a composite, in turn enhancing the damping and impact energy absorption. In order to take full advantage of these enhanced properties, the adhesion must be sufficient that an applied load can be transferred between the two phases without causing adhesive failure. Adhesion behavior between epoxy and polyamide 6 elastomer is examined for compression molded samples using the wedge test. The influence of processing conditions on adhesion is also investigated. The strength of the bonds suggests that these matrix combinations provide viable avenues for toughening existing composite materials.

References: 1. Jang, B.Z., et al. “Impact Resistance and Energy Absorption Mechanisms in Hybrid Composites.” Composites Science and Technology 34 (1989): 305-335. http://doi.org/10.1016/0266-3538(89)90002-X. 2. Beier, Uwe, et al. “Mechanical Performance of Carbon Fibre-Reinforced Composites Based on Preforms Stitched with Innovative Low-Melting Temperature and Matrix Soluble Thermoplastic Yarns.” Composites Part A: Applied Science and Manufacturing 39(9) (2008): 1572–1581. http://doi.org/10.1016/j.compositesa.2008.06.003. 3. Hogg, Paul J. “Toughening of Thermosetting Composites with Thermoplastic Fibres.” Materials Science and Engineering: A 412 (2005): 97–103. http://doi.org/10.1016/j.msea.2005.08.028. 4. Favre, Jean-Paul. “Improving the Fracture Energy of Carbon Fibre-Reinforced Plastics by Delamination Promoters.” Journal of Materials Science 12 (1977): 43-50. http://doi.org/10.1007/BF00738470. 5. Masters, John E. “Improved Impact and Delamination Resistance through Interleafing.” Key Engineering Materials, 37 (1989): 317–348. http://doi.org/10.4028/www.scientific.net/kem.37.317. 6. Daelemans, Lode, et al. “Using Aligned Nanofibres for Identifying the Toughening Micromechanisms in Nanofibre Interleaved Laminates.” Composites Science and Technology 124 (2016): 17–26. http://doi.org/10.1016/j.compscitech.2015.11.021. 7. Daelemans, Lode, et al. “Damage-Resistant Composites Using Electrospun Nanofibers: A Multiscale Analysis of the Toughening Mechanisms.” ACS Applied Materials & Interfaces, 8(18) (2016): 11806–11818. http://doi.org/10.1021/acsami.6b02247. 8. Akangah, Paul, et al. “Effect of Nylon-66 Nano-Fiber Interleaving on Impact Damage Resistance of Epoxy/Carbon Fiber Composite Laminates.” Composite Structures 92(6) (2010): 1432–1439. http://doi.org/10.1016/j.compstruct.2009.11.009. 9. Palazzetti, R., et al. “The Self-Reinforcing Effect of Nylon 6,6 Nano-Fibres on CFRP Laminates Subjected to Low Velocity Impact.” Composite Structures 106 (2013): 661–671. http://doi.org/10.1016/j.compstruct.2013.07.021. 10. Palazzetti, R., et al. “Influence of Electrospun Nylon 6,6 Nanofibrous Mats on the Interlaminar Properties of Gr–Epoxy Composite Laminates.” Composite Structures 94(2) (2012): 571–579. http://doi.org/10.1016/j.compstruct.2011.08.019. 11. Tsotsis, Thomas K. “Interlayer Toughening of Composite Materials.” Polymer Composites (2009): 70–86. http://doi.org/10.1002/pc.20535. 12. Daelemans, Lode, et al. “Nanofibre Bridging as a Toughening Mechanism in Carbon/Epoxy Composite Laminates Interleaved with Electrospun Polyamide Nanofibrous Veils.” Composites Science and Technology 117 (2015): 244–256. http://doi.org/10.1016/j.compscitech.2015.06.021. 13. Groleau, M.R., et al. “Mode II Fracture of Composites Interlayered with Nylon Particles.” Composites Science and Technology 56(11) (1996): 1223–1240. http://doi.org/10.1016/s0266-3538(96)00080-2. 14. Caprino, G., et al. “The Effect of Shear on the Rigidity in Three-Point Bending of Unidirectional CFRP Laminates Made of T800H/3900-2.” Composite Structures 88(3) (2009): 360–366. http://doi.org/10.1016/j.compstruct.2008.04.014. 15. Hojo, Masaki, et al. “Mode I Delamination Fatigue Properties of Interlayer-Toughened CF/Epoxy Laminates.” Composites Science and Technology 66(5) (2006): 665–675. http://doi.org/10.1016/j.compscitech.2005.07.038. 16. Cardwell, B.J. and Yee, A.F. “Toughening of Epoxies through Thermoplastic Crack Bridging.” Journal of Materials Science 33 (1998): 5473-5484. http://doi.org/10.1023/A:1004427123388. 17. Thanomsilp, C. and Hogg, P.J. “Penetration Impact Resistance of Hybrid Composites based on Commingled Yarn Fabrics.” Composites Science and Technology 63 (2003): 467-482. https://doi.org/10.1016/S0266-3538(02)00233-6 18. ASTM Standard D3762-03, 2010, “Standard Test Method for Adhesive-Bonded Surface Durability of Aluminum (Wedge Test)” ASTM International, West Conshohocken, PA, 2010, DOI: 10.1520/D3762-03R10, www.astm.org 19. Cognard, J. “The Mechanics of the Wedge Test.” The Journal of Adhesion 20(1) (1986): 1-13. http://doi.org/10.1080/00218468608073236.

Conference: SAMPE 2019 - Charlotte, NC

Publication Date: 2019/05/20

SKU: TP19--1504

Pages: 11

Price: FREE