International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 11 | Nov 2022
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e-ISSN: 2395-0056 p-ISSN: 2395-0072
Impact Testing of E Glass Fiber Epoxy Nanoclay composites P. Anjani Devi 1, P. Ravinder Reddy 2, K. Eswara Prasad 3 Chaitanya Bharathi Institute of Technology, Hyderabad ,India 3 JNTUH College of Engineering, Hyderabad, India ---------------------------------------------------------------------***--------------------------------------------------------------------results tests showed by adding nanoclay ,till 3 % of their Abstract - FRP composite materials are playing a major in 1, 2
wiight the hardness was found to increase and further addition diminished the property value. Bino Prince Raja D et al [5]investigated the mechanical properties of hybrid Glass Fiber out of which one of the properties was Impact property . Their work gave conclusion that the impact property enhanced b the addition of nano particles in the making of a composite material.
transformation of the brach f materials . they possess excellent characteristic strength to weight ratio , greatly flexible and are highly rigid made them replace the usually used traditional materials . Also being lighter adds the great benefit and their availability made them find uses in variety of engineering fields and applications in several industries. In the current work , an investigation is made in which a Glass epoxy fabricated with varying percentages of Nanoclay viz , 1.5 ,3.5 and compared with unmodified epoxy composite. Three different orientations viz unidirectional, Symmetric and Asymmetric of the laminate are considered. Impact characterization of the material is performed as per ASTM D256. Scanning Electron Microscopy of the surface is also done to characterize the material property
2. Fabrication of laminate The materials used for testing are prepared using LapoxL12 resin and K6 as a hardener. The reinforcement employed in the making of the composite sample was unidirectional EGlass fiber. The fiber was manufactured and supplied by Arrow Technical Textiles PVT LTD, Maharastra. The area weight of the fiber was about 650g/m2.For three different type of Nanoclay loading and three different orientations the laminates were fabricated using hand layup technique at a volume fraction of 60% fiber. The orientations of laminates considered are unidirectional, symmetric, and Quasi isotropic types. Also sonication process was employed for dispersing nanoclay into Epoxy resin. The mixture is sonicated for 45 minutes . There is a chance of captivity of air bubbles that consistently happen during sonication process. Therefore to takeoff the trapped air in the sonicated mixture , this is put to vacuum degasification for a time of about 6 hours. Later, hardener is added to epoxy-resin in the ratio of 1:10 and mixed thoroughly. Subsequently, Hand Layup technique is used for the manufacturing of the composites. Once fabricated the laminate is kept aside for curing for 24 hours. The manufactured samples were all subjected to post curing at 140°C for 6hours. The samples for testing cut from the laminates and the size of the samples considered is 64mm x 12.7mm x 3.2 mm as per ASTM standard.
Key Words:
Nanoclay, impact testing, Polymer composites, ASTM , Scanning Electron Microscopy
1. INTRODUCTION Fiber reinforced polymers play a dominating role and they really emerged superior materials over the traditional materials and hace abundant usues in the. Suhas Yeshwant Nayak[1] et al worked on the mechanical properties of Eglass Chopped Strand Mat (CSM) of varied weight fractions viz 15%, 30%, and 45% and the matrix material used was CNSL-epoxy resin wherein Hand layup technique was employed for the fabrication of the test piece. They found a clear indication in the improvement of micro hardness by increased in fiber content. K. Krushnamurty etal[2], made investigations by using the Nanoclay to check with the mechanical properties live impact property of E Glass epoxy composite at a 3 weight percentage, the addition of Nanoclay they found the property to increase but at weight percentage of 5 , they found the properties to diminish due to the embrittlement of the matrix..Smaranika Nayak et al[3], assessed the impact property of hybrid glass composite. The composite was diffused in water and the effect of it on the mechanical property of the composite sample was tested. The hand layup technique was employed for the assessment of the impact property of the composite . Their work gave a very good result on the impact property. Sharma et al [4]. in their present work used epoxy modified with Cloisite variety of nanoclay with three different weight percentages of 1, 3 and 5 wherein the reinforcement used was unidirectional E-glass fiber nanocomposites and hand layup technique was used to fabricate the sample. Their
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Impact Factor value: 7.529
Fig 1 Dispersion of nano clay into epoxy resin using probe sonicator
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