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DIGITAL LIBRARY: CAMX 2023 | ATLANTA, GA | OCTOBER 30-NOVEMBER 2

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Preliminary Experimental Study of Using Nano-enhanced Epoxy Adhesive to Bond Carbon Nanofibers Z-Threaded CFRP Laminates

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Title: Preliminary Experimental Study of Using Nano-enhanced Epoxy Adhesive to Bond Carbon Nanofibers Z-Threaded CFRP Laminates

Authors: Ryan A. Warren, William W. Taylor, Mohammad R. Islam, Kuang-Ting Hsiao

DOI: 10.33599/nasampe/c.23.0122

Abstract: Previous studies have provided evidence that reinforcement of epoxy adhesives with nanostructures such as carbon nanofibers (CNFs) produces higher strength bonded joints between carbon fiber reinforced polymer (CFRP) laminates and shifts bond-line failure modes from the adhesive into the laminate. Despite this, there has been no research dedicated to applying reinforced adhesives to the bonding of nano-reinforced CFRP such as CNF z-threaded carbon fiber reinforced polymer (ZT-CFRP) laminates, which have been proven to exhibit increased interlaminar shear strength, mode-I delamination toughness, and compressive strength over traditional CFRP. This study examined the effectiveness of using CNF reinforced epoxy adhesives for unidirectional ZT-CFRP laminate bonding through single-lap shear tests using the ASTM D5868-01 standard. Unidirectional CFRP laminate samples bonded with both epoxy adhesive and CNF reinforced epoxy adhesive were also tested for comparison. It was found that the average shear strength observed for ZT-CFRP samples bonded with CNF reinforced epoxy adhesive was approximately 44% and 26 % higher than that of CFRP samples bonded with epoxy adhesive and CNF reinforced epoxy adhesive, respectively. Microscopic image analysis was performed to examine the mode of bond failure. The roles of nanomaterials in the fracture mechanism of the adhesive and the composite laminates are also discussed.

References: 1. Hsiao, Kuang-Ting, et. al. “Effect of carbon nanofiber z-threads on mode-I delamination toughness of carbon fiber reinforced plastic laminates.” Composites: Part A 91 (2016): 324-335 2. Kirmse, S., Kim, K., Ranabhat, B., Hsiao, K-T. “Effects of Carbon Nanofiber Z-Threads in the Longitudinal Compressive Strength of Unidirectional CFRP Laminates”. Proceedings of International SAMPE Tech. Conf. Charlotte, NC, May 20, 2019. SAMPE- Society for the Advancement of Material and Process Engineering 3. Kirmse, S. and Hsiao, K-T. “Enhancing the Interlaminar Shear Strength of Unidirectional Carbon Fiber Reinforced Plastic (CFRP) Laminate Using a Nanofiber Z-Threading Strategy”. CAMX Conference Proceedings. Dallas, TX, October 15-18, 2018. CAMX- The Composites and Advanced Materials Expo. 4. Hsiao, Kuang-Ting, et al. “Use of Epoxy/multiwalled carbon nanotubes as adhesives to join graphite fibre reinforced polymer composites”. Nanotechnology 14 (2003): 791-793 5. Taylor, W., Uddin, M., Islam, M., Dizbay-Onat, M., Hsiao, K-T. “A Preliminary Study of Using Film Adhesives Containing Aligned and Unaligned Nanotubes and Nanofibers for Bonding CFRP Laminates and Steel Plates.” Proceedings of International SAMPE Tech. Conf. Charlotte, NC, May 23-26, 2022. SAMPE- Society for the Advancement of Material and Process Engineering 6. Sarac, Ismail, et. al. “Investigation of the effect of use of Nano-Al2O3, Nano-TiO2 and Nano-SiO2 powders on strength of single lap joints bonded with epoxy adhesive”. Composites Part B: Engineering 166 (2019): 472-482 7. Kaline, T., et. al. “Determination of the influence of adherent surface on the adhesive bond strength”. MATEC Web of Conferences 157 (2018) https://doi.org/10.1051/matecconf/201815705012 8. ASTM Standard D5868-01, 2023, “Standard Test Method for Lap Shear Adhesion for Fiber Reinforced Plastic (FRP) Bonding”. ASTM International, West Conshohocken, PA, 2023 9. Chen, Y., et, al. “Mechanical behavior and progressive failure analysis of riveted, bonded, and hybrid joints with CFRP-aluminum dissimilar materials”. Thin-Walled Structures 139 (2019): 271-280

Conference: CAMX 2023

Publication Date: 2023/10/30

SKU: TP23-0000000122

Pages: 15

Price: $30.00

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