Experimental, analytical and finite element studies on nano(MWCNT) and hybrid (MWCNT/glass fiber) filler reinforced poly
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ORIGINAL RESEARCH
Experimental, analytical and finite element studies on nano(MWCNT) and hybrid (MWCNT/glass fiber) filler reinforced polypropylene composites N. Rasana1,2 · K. Jayanarayanan1,2 · K. I. Ramachandran3 Received: 26 April 2020 / Accepted: 1 September 2020 © Iran Polymer and Petrochemical Institute 2020
Abstract Multiscale filler-reinforced composites are emerging category of advanced materials which can replace a range of conventional materials in various applications. The nanofiller reinforcement and the synergistic inclusion of nano- and micro reinforcements in the polymer matrix could generate composites that are suitable in applications where high modulus, strength, and reasonable ductility are required. In light of the above, the nano, micro, and hybrid filler-reinforced composites were prepared by twin screw extrusion and an effort was made to understand the tensile property of the composite through experimental, analytical, and simulation methods. Hybrid multiscale (nano and micro) filler-reinforced composites were prepared by maintaining a fixed composition of microscale glass fiber as 20% (wt) and with varying composition of nanoscale MWCNTs from 1 to 5% (wt) in PP matrix. The present study proposes the modeling of nano (MWCNT) and hybrid filler (glass fiber/ MWCNT) reinforcement in polypropylene (PP) matrix using finite-element analysis (FEA) by ANSYS. A representative volume element demonstrating the heterogeneous composite system is developed and simulated with appropriate boundary conditions. To establish the validity of FEA results, for the chosen nanocomposite and hybrid composite containing 3% (wt) of MWCNTs, finite-element modeling results were compared with experimental and micromechanical model values. It could be inferred that FEA results overpredicted the tensile strength and modulus with regard to experimental and analytical observations owing to the assumptions like perfect bonding and nanoclustering. Keywords Multiscale · Finite-element analysis · Representative volume element · Micromechanical model · MWCNTs · Glass fiber
Introduction Nano and hybrid filler-reinforced polymer composites are the materials in which the base polymer matrix is reinforced with nanoscale and a combination of nanoscale and * N. Rasana [email protected]; [email protected] 1
Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, India
2
Centre of Excellence in Advanced Materials and Green Technologies (CoE-AMGT), Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, India
3
Centre for Computational Engineering and Networking, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, India
microscale fillers. The reinforcements which are of nanofillers such as nanosilica, nanoclay, carbon nanotubes, halloysite nanotubes, graphene, nanocellulose, etc., or micron (glass fibers, talc, carbon black, calcium carb
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