Browsing by Author "Vijay, R"

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    Characterization of chemical treated and untreated natural fibers from Pennisetum orientale grass- A potential reinforcement for lightweight polymeric applications
    (KeAi Publishing Communications Ltd., 2020-07-15) Vijay, R; Vinod, A; Lenin ,Singaravelu. D.; Sanjay, M.R; Siengchin, Suchart
    The current work deals with the study extraction and characterization of fibers from Pennisetum orientale grass. The fibers were extracted, treated chemically with hydrochloric acid and sodium hydroxide (alkali) solutions. The chemically modified and unmodified fibers were analyzed for its thermal, chemical, crystalline, physical, morphological and tensile characteristics. The test results showed that chemical treatment using alkali helped to increase the cellulose content by 65.1% with a reduction in amorphous contents and moisture. But the hydrochloric acid treatment reduced the cellulose contents due to its more acidic attack whose values were lower than the untreated one. The crystalline size of alkali treatment based fibers had 42.92 nm, which is lower than untreated one 62.02 nm. Thus the Pennisetum orientale grass can be suggested as a potential reinforcement for light-weight polymeric applications.
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    Development and characterization of stainless steel fiber-based copper-free brake liner formulation: A positive solution for steel fiber replacement
    (Tsinghua University Press, 2019-05-10) Vijay, R; Singaravelu, D. Lenin.; Jayaganthan, R
    This study deals with the development of drum brake liner for a multi-utility vehicle possessing a hydraulic brake system by varying 7 weight % of steel fiber and stainless steel fiber each, in friction composite formulations. The developed friction composites were tested for physical, chemical, corrosion, mechanical, thermal properties, and tribological characteristics, under near-actual conditions using an inertia dynamometer as per industrial standards. Finite element analysis software (ANSYS) analysis was performed to show the thermal stress distribution of the developed friction composites at the maximum temperature rise due to heat generated during brake stops, and an extensive evaluation method was used to rank the composites. The study concludes that the brake factor of the stainless steel fiber-based friction composite produces stable performance in all conditions with a lower liner temperature rise of 340 °C and lower thermal stress at 4.255294 MPa. However, the steel fiber-based composites produced high performance at the beginning but deteriorated after a certain period due to higher levels of corrosion and a high temperature rise of 361 °C resulting in a negative fade (−0.84%) and more thermal stress (5.619102 MPa). The primary plateau, secondary plateau, back transfer of drum wear debris, and the distribution of constituents on the worn surface of the developed composites in a resin matrix were identified and studied using a scanning electron microscope (SEM) equipped with energy-dispersive spectroscopy. © 2019, The Author(s).
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    Extraction and characterization of vetiver grass (Chrysopogon zizanioides) and kenaf fiber (Hibiscus cannabinus) as reinforcement materials for epoxy based composite structures
    (Elsevier Editora Ltda, 2019-12-09) Khan, Anish; Vijay, R; Lenin, Sinaravelu D.; Arpitha, G. R.; Sanjay, M. R.; Siengchin, Mohammad; Alamry, Khalid; Asiri, Abdullah M.
    The study deals with the mechanical characterization of vetiver grass fiber and kenaf fiber reinforced epoxy-based hybrid composites. Five types of composite laminates were developed through the hand lay-up process by varying the percentage of vetiver grass and kenaf fibers. The tensile, flexural, compression and impact tests were conducted as per ASTM. The fractured surfaces of the tested specimens were studied using a scanning electron microscope. From the results, it was shown that properties of epoxy composites were improved by hybridization with vetiver grass and kenaf fibers. The improved mechanical properties of fiber-reinforced composites were noticed in increment of percentage composition of kenaf fibers