The impact of MWCNT modification on the structural performance of polymeric composite profiles
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The impact of MWCNT modification on the structural performance of polymeric composite profiles Ali Tabatabaeian1 · Ahmad Reza Ghasemi1 Received: 27 June 2019 / Revised: 27 November 2019 / Accepted: 27 December 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The significant advantages of nanoparticles have motivated engineers to focus on development of structural integrity by use of these materials. This paper presents a comprehensive experimental study on the impact of nanomodification in laminated composite structures. The influence of nanomaterials on the mechanical performance is examined through the assessment of “residual stress,” “weight loss under thermal fatigue” and “delamination damage in machining operations” of glass fiberreinforced polymer (GFRP) composites. In this case, different composite specimens were fabricated with 0% and 1% weight fraction of multi-walled carbon nanotubes (MWCNTs). Then, the slitting method as an accurate semi-destructive technique was performed to measure the non-uniform residual stresses in terms of MWCNTs content. Also, the role of MWCNTs in the weight loss of the specimens with different thicknesses under thermal fatigue was analyzed. Additionally, the rotary ultrasonic drilling technique as a high-tech drilling operation was carried out and delamination damage of the GFRPs under machining process was measured. The results indicated that the addition of 1% MWCNTs results in a decrease of 30% and 2.33% in residual stress and delamination states, respectively. Keywords Glass fiber-reinforced polymer (GFRP) · Multi-walled carbon nanotubes (MWCNTs) · Residual stress measurement · Weight loss · Delamination · Experimental test
Introduction Composite materials today have an extensive application, ranging from automotive and wind energy to dental and biomedical industries. They are basically a mixture of two phases, including a matrix phase and a fiber reinforcement. Realistic proportion * Ahmad Reza Ghasemi [email protected] 1
Composite and Nanocomposite Research Laboratory, Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Kashan 87317‑53153, Iran
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of these components leads to significantly high thermo-mechanical properties such as high-specific strength, good wear resistance and elevated temperature properties [1–4]. This combination, however, could bring about its drawbacks as well. The mismatch between matrix and fiber due to the different coefficient of thermal expansion (CTE), for example, is likely to happen, leading to the creation of residual stresses during the manufacturing process, or crack progression and delamination under machining operations. One possible approach, in this case, would be to use nanomaterials. So, it appears essential to more deeply analyze the application of nanoparticles. Over the past decade, the use of nanoparticles has gained a great deal of attention in the field of polymer composites. The change from micro-sized fillers to
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