Aramid Reinforced Polymer Composites Case Study

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1. The choice of materials and reason.  Dispersed phase: 1. Carbon fiber reinforced polymer composites (CFRPs) 2. Aramid reinforced polymer composites (ARPCs) 3. Glass fiber reinforcement composites (GFRs) **In each case the fiber is encased in a resin matrix (the continuous phase). **These matrices are usually acrylicepoxyphenolic or polyester resins. Reason for the selection: Because carbon fiber is light and able to increase the strength of the tennis rackets. Reinforcement had impact resistance, stiffness and tensile properties. It improves fatigue life and corrosion resistance.  Matrix phase: The first of these composite materials consisted of glass fibers held within a polyester resin matrix, and later rackets went on to encompass…show more content…
How to test the quality of the parts manufactured. The important properties/ parameter of tennis racket to be examined are tensile strength, stiffness and pattern density.  The head size of the tennis rackets provides the desired power. A larger head provides more power (longer head) or a better control (wider head).  The beam size (racket 's cross section) influences the racket 's stiffness and power.  Most modern racket frames are made from light-weight graphite or graphite composites allowing good frame flexibility, more power or more control, depending on the shots.  Other important aspect refers to how racket’s weight and its distribution affect balance and control. A. String testing – tensile testing - Tests are performed to measure tensile strength, elongation at break, knot strength and elongation percentage at given loads. The instrument is fitted with a 2kN horn grip. - Elongation is measured at 45kg force to replicate the ball hitting the strings. - Knot strength is measured because if this is too low, the string will break. - Full testing is carried out at regular intervals during processing (1 in 500 samples) plus product is randomly selected for further analysis. Future tests will include a load then relaxation cycle to allow tension loss over time to be…show more content…
(2017). YouTube. Retrieved 26 November 2017, from https://www.youtube.com/watch?v=QbA39s0dznQ Stringing a racquet on the Klippermate Racquet Stringing Machine. (2017). YouTube. Retrieved 26 November 2017, from https://www.youtube.com/watch?v=dH1ni6XavpM Lichtarowicz, M. (2013, March 18). Composites. Retrieved from http://www.essentialchemicalindustry.org/materials-and-applications/composites.html (2001, March 26). Advanced Materials take on Tennis. Retrieved from https://www.azom.com/article.aspx?ArticleID=216 (2013, July 19). Synthesis, Testing of Nylon 6,6/Multi-wall Carbon Nanotube and Modeling, Analysis of Tennis Racket Frame and String. Retrieved from http://www.worldacademicunion.com/journal/SSCI/SSCIvol07no02paper06.pdf (2016, June 2). High resolution imaging of impacted CFRP composites with a fiber-optic laser-ultrasound scanner. Retrieved from https://doi.org/10.1016/j.pacs.2016.05.002 (2002, August 7). Tennis Racket - Materials, Design, Evolution and Testing. Retrieved from https://www.azom.com/article.aspx?ArticleID=1559 Ltd., L. (2017). Materials Testing - Advances in String Technology in Sporting Equipment Materials. AZoM.com. Retrieved 23 November 2017, from

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