Influence of UHMWPE fiber and Ti6Al4V metal surface treatments on the low-velocity impact behavior of thermoplastic fibe
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ORIGINAL RESEARCH
Influence of UHMWPE fiber and Ti6Al4V metal surface treatments on the low-velocity impact behavior of thermoplastic fiber metal laminates Logesh Shanmugam 1 & M. E. Kazemi 1 & Cheng Qiu 1 & Ma Rui 2 & Lei Yang 2 & Jinglei Yang 1 Received: 14 October 2020 / Revised: 24 October 2020 / Accepted: 10 November 2020 / Published online: 23 November 2020 # Springer Nature Switzerland AG 2020
Abstract The unique combination of alternate thin layers of metal and complete thermoplastic fiber-reinforced polymer (FRP) gives birth to a new generation of hybrid thermoplastic fiber metal laminates (T-FML), which are considered for high impact resistance applications. T-FML is fabricated by Ti6Al4V metal alloy and ultra-high molecular weight polyethylene (UHMWPE) with infusible liquid methyl methacrylate thermoplastic resin (Elium®). The impact damage resistance of T-FML depends on the interlaminar interface and metal thermoplastic composite interface (MTCI). Higher interfacial properties provide improved stiffness and resistance to the delamination of crack growth in T-FML during an impact loading. Fiber and metal surfaces are modified to enhance the interlaminar interface and MTCI. The fiber surface is treated by a simple deposition of polydopamine (PDA) with the addition of 0.03 wt.% multiwalled carbon nanotubes (MWCNT), and the metal surface is treated by using an electrochemical process. Experimental investigations were carried out on the T-FML composite laminates to determine the lowvelocity impact behavior at three different impact energies (43 J, 50 J, 80 J). The results revealed that the non-impacted Ti alloy face sheet on the rear side of the T-FML plays an important role in absorbing the impact energy by creating a single crack in the rolling direction. Also, the single crack growth is suppressed when the MTCI is improved after the fiber and metal surface treatment. Keywords UHMWPE fibers . Surface treatment . Thermoplastic FML . MTCI . Low-velocity impact
1 Introduction Thermoplastic fiber metal laminate (T-FML) is an advanced material system that is made by combining alternate thin metal layers and thermoplastic-based fiber-reinforced polymer (FRP) composites. High impact resistance, lightweight, flaming resistance, corrosion resistance, and high tensile strength and modulus are highlighting properties of FML’s [1–5]. The combination of ductile metal layers and thermoplastic FRPs
* Lei Yang [email protected] * Jinglei Yang [email protected] 1
Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR
2
College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, China
formulates a unique combination and provides higher impact resistance compared to the traditional thermoset-based or thermoplastic-based FRP composite systems [4, 6]. During an impact testing, in the unique combination of FML, the ductile nature of metal absorbs a large amount of energy in the elastic region and forms a large strain rat
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