Conference Papers

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Author: search.filters.author.Bharath, J.

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    Frequency and deflection analysis of cenosphere/glass fiber interply hybrid composite cantilever beam
    (American Institute of Physics Inc. subs@aip.org, 2018) Bharath, J.; Joladarashi, S.; Biradar, S.; Kumar, P.N.
    Interply hybrid laminates contain plies made of two or more different composite systems. Hybrid composites have unique features that can be used to meet specified design requirements in a more cost-effective way than nonhybrid composites. They offer many advantages over conventional composites including balanced strength and stiffness, enhanced bending and membrane mechanical properties, balanced thermal distortion stability, improved fatigue/impact resistance, improved fracture toughness and crack arresting properties, reduced weight and cost. In this paper an interply hybrid laminate composite containing Cenosphere reinforced polymer composite core and glass fiber reinforced polymer composite skin is analysied and effect of volume fraction of filler on frequency and load v/s deflection of hybrid composite are studied. Cenosphere reinforced polymer composite has increased specific strength, specific stiffness, specific density, savings in cost and weight. Glass fiber reinforced polymer composite has higher torsional rigidity when compared to metals. These laminate composites are fabricated to meet several structural applications and hence there is a need to study their vibration and deflection properties. Experimental investigation starts with fabrication of interply hybrid composite with cores of cenosphere reinforced epoxy composite volume fractions of CE 15, CE 25, CE15-UC as per ASTM E756-05C, and glasss fiber reinforced epoxy skin, cast product of required dimension by selecting glass fibre of proper thickness which is currently 0.25mm E-glass bidirectional woven glass fabric having density 2500kg/m3, in standard from cast parts of size 230mmX230mmX5mm in an Aluminum mould. Modal analysis of cantilever beam is performed to study the variation of natural frequency with strain gauge and the commercially available Lab-VIEW software and deflection in each of the cases by optical Laser Displacement Measurement Sensor to perform Load versus Deflection Analysis. Young's Modulus values obtained from deflection equation of cantilever beam with different respective load versus deflection values are compared and validated with value obtained using first mode of natural frequency equation of cantilever beam. © 2018 Author(s).
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    Investigation of static and dynamic properties of cenosphere reinforced polymer matrix composite beams
    (American Institute of Physics Inc. subs@aip.org, 2019) Bharath, J.; Joladarashi, S.; Nagiredla, S.; Kumar, H.
    Polymer Matrix Composites (PMC) plays a conspicuous role in engineering application. Cenosphere reinforced polymer matrix composite has higher strength, stiffness, lesser density and also saving in cost. These particulate composites are manufactured to meet several structural requirements. Thus there is a need to study their static and dynamic properties. In this work polymer epoxy polymer composites reinforced with cenosphere are fabricated and their static and dynamic properties are analyzed. Experimental investigation involves fabrication of specimen of polymer matrix reinforced with cenosphere by varying volume fractions of 25%, 30%, 35%, and 40%. Tensile and compressive properties are tested on UTM as per ASTM standard. Microstructures of composites are assessed with SEM and also Model analysis of cantilever beam is performed as per ASTM standard in Engineering Data Management System (EDM 7.0) of Crystal Instruments to study variation of natural frequency in each case. The natural frequency results are compared with the commercially available ANSYS FE software by assigning the material propertied obtained by static analysis. Thus effects of volume fraction of cenosphere on static and dynamic characteristics of particulate composites are studied. © 2018 Author(s).