Vivek Mishra
@tgpcet.com
Associate Professor, Department of Aeronautical Engineering
Tulsiramji Gaikwad-Patil College of Engineering and Technology, Nagpur
EDUCATION
PhD Mechanical
RESEARCH, TEACHING, or OTHER INTERESTS
Materials Science, Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Gaurav Gupta, Virendra Rajput, Bhavana Ayachit, Mantra Prasad Satpathy, Pravat Ranjan Pati, Vivek Mishra, and Alok Agrawal
SAGE Publications
Kota stone dust (KSD) is an unwanted material engendered throughout the process of manufacturing Kota stone. The present work comprises the appropriate consumption of KSD for evolving a composite system with epoxy as the base matrix material. The samples are developed by the hand lay-up technique. The micrographs clearly show that KSD is uniformly distributed within the epoxy matrix and establishes good adhesion with it. With the inclusion of filler, density unwillingly increases by 21.86%, but voids generated are limited to only 4.98% for a maximum filler content of 40 wt. %. A very low water absorption rate of 0.81% for maximum filler loading is observed. The compressive strength and micro-hardness increased by 31.8% and 26.25% respectively. Tensile strength, as well as flexural strength, improves for low filler loading of 20 wt. % and decreases thereafter. The sliding wear tests of the fabricated composites are studied in this research employing fairly advanced nature-inspired Grey wolf optimisation (GWO). The wear tests are based on a real-world issue that is framed in Taguchi L25 OA. A simple linear regression equation demonstrates adequate agreement between predicted and experimental values. The inclusion of KSD decreases the wear rate. Further, it is found that the KSD loading is the utmost significant factor, whereas normal load is the least significant factor that administrates the sliding wear rate of the composite system. Using the grey wolf optimiser, the optimal settings are 2500 m sliding distance, 40 wt.% KSD content, 52 cm/s sliding velocity, and 10 N normal load. The validation test results suggest that GWO is superior to the classical Taguchi approach. The wear loss mechanism is examined under the scanning electron microscope.
Vivek Kumar Mishra, P. Dasthagiri, E. Anil Kumar, and Sourav Mitra
Elsevier BV
Priya Upadhyay, Virendra Rajput, Pushpendra Singh Rajput, Vivek Mishra, Irshad Ahmad Khan, Alok Jha, and Alok Agrawal
Elsevier BV
S. Chandraker, J. K. Dutt, A. Agrawal, H. Roy, Rajkumar, K. Chandrakar, and V. Mishra
Springer Science and Business Media LLC
Sagar Saren, Vivek Kumar Mishra, Kyaw Thu, and Sourav Mitra
Elsevier BV
Dhananjay Yadav, G. R. Selokar, Vivek Mishra, Faizal Ahmad, and Alok Agrawal
AIP Publishing
D Yadav, G R Selokar, A Agrawal, V Mishra, and I A Khan
IOP Publishing
Abstract In recent years, natural fibers incorporation in polymeric resin has received huge attention among the research community. The reasons of demand are multiple that includes its light weight, environmental friendly nature; non-toxic, low cost, easy availability, low processing cost and most importantly they possess characteristics which are comparable to conventional material. With this approach, present work comprises of fabrication of new category of natural fiber reinforced composites with polymer as base matrix. Sisal fiber is selected as reinforcing phase with epoxy matrix. Four different combination of composites are prepared with sisal fiber loading varies from 2.5 wt. % to 10 wt. % using well-known hand lay-up method. Sisal fibers were treated with NaOH at varied concentration to observe the effect of surface modification and its concentration on the developed material. Three different concentration of NaOH is used i.e. 2 mole, 4 mole and 6 mole for preparing three sets of composites. One set is prepared with raw sisal fiber to make total of four sets of composites. Mechanical properties under investigation are tensile behaviour, compressive behaviour and flexural behaviour. The experimental results obtained are compared for optimizing the concentration of NaOH. From the analysis it is seen that composite with surface modified sisal fiber yield better results and further fiber treated with 2 mole NaOH concentration is superior among their counterpart. The maximum tensile strength, compressive strength and flexural strength obtained are 31.5 MPa, 72.5 MPa and 37.8 MPa respectively. All these values are obtained for fiber treated with 2 mole NaOH aqueous solution.
Vivek Mishra, Alok Agrawal, Saurabh Chandraker, and Abhishek Sharma
Wiley
Vivek Mishra and Alok Agrawal
Wiley
B. Laxshaman Rao, Yash Makode, Adarsh Tiwari, Ojaswa Dubey, Sanskar Sharma, and Vivek Mishra
Elsevier BV
Suveer Chandra Dubey, Vivek Mishra, and Abhishek Sharma
Elsevier BV
Alok Agrawal, Tanmay Awasthi, Dinesh Kumar Soni, Abhishek Sharma, and Vivek Mishra
Elsevier BV
Roopesh Sinha, Rajesh Purohit, and Vivek Mishra
Elsevier BV
Vivek Mishra and Sandhyarani Biswas
Wiley
In present investigation, the three‐body abrasive wear behavior of short jute fiber reinforced epoxy composites was studied. The effect of various parameters such as fiber loading, sliding velocity, normal load, and abrasive size on the abrasive wear rate of composite has been analyzed. Abrasive wear study has been carried out using a dry sand/rubber wheel abrasion tester. The abrasive wear and friction characteristics of these composites are analyzed successfully using Taguchi orthogonal array and analysis of variance. The experimental study reveals that sliding velocity, fiber loading, and abrasive size have greater influence on the specific wear rate of the composites. The results show that the specific wear rate of the composites decreases with the increase in sliding velocity whereas, with the increase in normal load the specific wear rate increases. The study also revealed that the coefficient of friction of the composites increases up to a certain value than decreases with the increase in normal load as well as sliding velocity. The worn surfaces of the abraded specimens were examined using SEM to understand the mechanism involved in material removal. POLYM. COMPOS., 270–278, 2016. © 2014 Society of Plastics Engineers
Vivek Mishra and Sandhyarani Biswas
SAGE Publications
The need of eco-friendly, sustainable, and biodegradable material for structural and non-structural application increases day by day. Jute fiber is one of the largely produced natural fibers and has properties comparable to synthetic fibers. Currently, abrasive wear of the agricultural and engineering machine components is one of the major industrial problems. An attempt has been made in this paper to study the abrasive wear behavior of bidirectional jute fiber–epoxy composites. Composites of five different compositions with fiber loading ranging from 0 to 48 wt.% were prepared using hand lay-up technique. Observations has been made under steady state condition to understand the effect of sliding velocity and normal load on the specific wear rate and coefficient of friction of the composites. It further outlines a methodology based on Taguchi's experimental design approach to make a parametric analysis of wear behavior. It has been found that the composites with 36 wt.% fiber loading exhibits minimum specific wear rate at different sliding velocity and normal load. The parametric combination of factors, such as sliding velocity of 144 cm/s, fiber loading of 48 wt.%, normal load of 40 N, sliding distance of 70 m, and abrasive size of 200 µm shows an optimum condition for minimum specific wear rate, whereas sliding velocity of 144 cm/s, fiber loading of 12 wt.%, normal load of 10 N, sliding distance of 80 m, and abrasive size of 300 µm show an optimum condition for minimum coefficient of friction. Finally, the worn surfaces were examined using a scanning electron microscope.
V. Mishra and S. Biswas
Walter de Gruyter GmbH
Abstract Now-a-days, natural fiber based composites are emerging as a supplement to the synthetic fiber composites. The aim of the present work is to investigate the three-body abrasive wear behavior of needle-punch nonwoven jute fiber reinforced epoxy (NJFE) composites in an abrasive environment. Three-body abrasion studies have been done on composites using rubber wheel abrasion tester. The design of experiments approach using Taguchi methodology is employed for the parametric analysis of abrasive wear process. The effect of the factors such as sliding velocity, fiber loading, applied load, sliding distance and abrasive size on the specific wear rate and coefficient of friction of composite has been studied. Experimental results reveal the improvement of abrasive wear behavior of the composites with the addition of fiber as compared to neat epoxy. At steady state condition, it has been observed that composites with 36 wt% fiber loading shows minimum specific wear rate. From the statistical analysis it has been concluded that the factor combination with sliding velocity of 120 cm/s, fiber loading of 36 wt%, normal load of 10 N, sliding distance of 50 m and abrasive size of 400 μm gives minimum specific wear rate whereas sliding velocity of 144 cm/s, fiber loading of 36 wt%, normal load of 10 N, sliding distance of 70 m and abrasive size of 300 μm gives minimum coefficient of friction. Finally, the worn surfaces are examined by using scanning electron microscopy (SEM) and possible abrasion wear mechanisms are discussed.
Vivek Mishra and Sandhyarani Biswas
Elsevier BV
Vivek Mishra, Aydin Nabovati, Daniel P. Sellan, and Cristina H. Amon
American Society of Mechanical Engineers
The presence of sub-continuum effects in nano-scale systems, including size and boundary effects, causes the continuum-level relations (e.g., Fourier heat equation) to break down at such scales. The thermal sub-continuum effects are manifested as a temperature jump at the system boundaries and a reduced heat flux across the system. In this work, we reproduce transient and steady-state results of Gray lattice Boltzmann simulations by developing a one-dimensional, transient, modified Fourier-based approach. The proposed methodology introduces the following two modifications into the Fourier heat equation: (i) an increase in the sample length by a fixed length at the two ends, in order to capture the steady-state temperature jumps at the system boundaries, and (ii) a size-dependent effective thermal diffusivity, to recover the transient temperature profiles and heat flux values. The predicted temperature and heat flux values from the proposed modified Fourier approach are in good agreement with those predicted by the Gray lattice Boltzmann simulations.
D. P. Sellan, V. Mishra, J. A. Malen, A. J. H. McGaughey, and C. H. Amon
American Society of Mechanical Engineers
We assess a Fourier-based thermal model used in frequency-domain thermoreflectance data analysis. The Boltzmann transport equation (BTE) is first used to simulate sub-continuum phonon transport in a semi-infinite solid. We then compare the BTE-predicted temperature profiles to those predicted by an analytical solution of the Fourier-based conduction equation. The two models agree well when ωτ < 1, where ω is the surface-temperature modulation-frequency and τ is the bulk phonon relaxation time, but diverge when ωτ > 1.