Manuel George
@mangalam.ac.in
Associate Professor
Mangalam college of Engineering
Area of interest includes mechanical, thermal, tribological properties of graphene-based polymer composites. Currently working as Asst Prof in Mangalam college of engg. Since August 2021.
EDUCATION
• PhD in polymer nanocomposites
• M.Tech in Machine Design
• B.Tech in Mechanical Engg.
RESEARCH INTERESTS
composite materials
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Yang Hao, Manuel George, Rajeshkumar Selvaraj, Kundan Meshram, Amal M. Al-Mohaimeed, Rey Y. Capangpangan, Arnold C. Alguno, and Mohammed Al-Bahrani
Elsevier BV
Xianjie Liao, Apichat Manapaya, Manuel George, and Rajeshkumar Selvaraj
Elsevier BV
A. N. Shankar, Mattipally Prasad, Rajeshkumar Selvaraj, Manuel George, Akash Mohanty, and J. Sivakumar
Springer Science and Business Media LLC
Manuel George, Mattipally Prasad, Rajeshkumar Selvaraj, N. Sakthieswaran, J. Sivakumar, Amal M. Al‐Mohaimeed, Tse‐Wei Chen, Mohammed Al‐Bahrani, Rey Y. Capangpangan, and Arnold C. Alguno
Wiley
AbstractIn the present study, the dynamic behavior of rotating carbon fiber reinforced polymer (CFRP) composite tapered plates reinforced with graphene nanoparticles has been investigated using a finite element (FE) formulation. The mechanical properties of CFRP laminates containing 0–0.5 wt% graphene nanoparticles were assessed using ASTM standard tests. The experimental dynamic analysis was conducted on CFRP and graphene reinforced CFRP composites under cantilever end conditions. The first‐order shear deformation theory (FSDT)‐based FE model was developed using MATLAB software to obtain the natural frequencies of the graphene reinforced CFRP plates. The validity of the FE results is compared with literature, and it shows excellent agreement for composite structures. Furthermore, parametric analysis is performed to explore the influence of wt% of graphene, rotating speed, setting angle, and ply thickness on the dynamic responses of graphene reinforced CFRP tapered plates.Highlights Effects of graphene reinforcement in CFRP composites are investigated. The mechanical characteristics were evaluated using ASTM standards. FSDT is employed to model the rotating tapered graphene‐CFRP plates. Vibration behavior of graphene‐CFRP composites is studied experimentally. Effects of various factors on the vibrations of the CFRP plates are studied.
Manuel George, K. Pratheesh, Akash Mohanty, Nakul Suresh, Tijo Varghese, Richard Sunny, and S. Narayanan
Elsevier BV
Manuel George and Akash Mohanty
Wiley
Manuel George and Akash Mohanty
Wiley
Manuel George and Akash Mohanty
IOP Publishing
In this paper, the thermal conductivity, dielectric properties and dynamic mechanical properties were studied for Graphene Decorated with Graphene Quantum Dots (GDGQD)-epoxy nanocomposites. A maximum thermal conductivity enhancement of 19% registered for 0.75 wt% GDGQD sample where a low acoustic impedance mismatch between the interface of GDGQD fillers and the epoxy matrix occur and a dielectric constant increase of 6% due to the better charge accumulation at the conductive filler/ insulating polymer interface of the composite. Further DMA is performed using the cantilever mode. The loss modulus peak obtained for 0.75 wt% GDGQD-epoxy sample given a maximum value due to the interface interaction and the corresponding storage modulus shown a maximum increment of 21%, due to the molecular dynamics and cross-linking density of the epoxy matrix with GDGQD. The thermal stability of the samples evaluated using Thermal Gravimetric Analysis (TGA) shown an improvement in glass transition temperature (Tg) of nanocomposite for 0.75 wt% GDGQD by 11 °C where a greater dispersion of the fillers and efficient functional groups interaction are responsible factors.
Manuel George and Akash Mohanty
Informatics Publishing Limited
The paper discusses about the wear and micro hardness behavior of Graphene Decorated with Graphene Quantum Dots (G-D-GQD) reinforced epoxy composites. The samples were prepared by open mold casting method by adding 0.25–1 wt. % (in an interval of 0.25%) of GDGQD and evaluated on a reciprocating wear tester configuration for wear and coefficient of friction properties. The micro-hardness testing of the G-D-GQD particles embedded epoxy composites has been performed and the hardness value results were compared with neat epoxy to find the improvement in hardness. Significant improvements in the hardness and wear resistance of the epoxy nanocomposites was obtained by the embedding of G-DGQD fillers, which is due to the efficient bonding of GDGQD filler with the epoxy matrix. Scanning Electron Microscope (SEM) images of the worn composites were analysed to get an insight into the morphology of the surfaces. Furthermore, the coefficient of friction of the composites got increased with the wt. % of fillers in the base material, but due to the superior bond strength and lesser agglomeration of the particles, the Vicker's hardness improved and the wear loss reduced. Hence the surface area coverage of G-D-GQDs got a significant role in the reduced wear loss and thereby coming to a threshold value. The study concludes by suggesting that 0.25 wt. % GDGQD/epoxy composites shown a least wear rate and increased hardness of 0.023% and 26%, respectively thereby suggesting application involving reduced wear rates.
RECENT SCHOLAR PUBLICATIONS
MOST CITED SCHOLAR PUBLICATIONS
GRANT DETAILS
Synthesis of Graphite nanoplatelets decorated with spinel ferrite materials by using various surfactants on CF/GF composites for EMI shielding.
Funding Agency : DST-SERB,
Ongoing, Principle Investigator, Fund- 595000,
2023 - 2027