Papers by Dr. K.Ch.KISHOR KUMAR
An improved whale optimization algorithm (IWOA) is developed for the model order reduction (MOR) ... more An improved whale optimization algorithm (IWOA) is developed for the model order reduction (MOR) of large-scale systems (LSS) in this paper. An equivalent reduced order model (ROM) for the higher-order system (HOS) is derived by considering integral square error (ISE) as the objective function using IWOA. Many practical systems of single-input and single-output (SISO) and multi-input and multi-output (MIMO) systems are considered to examine the worth of the proposed technique. The powerfulness and robustness of the proposed design technique are tested on various typical examples. Several simulation results have been reported to demonstrate the efficacy of IWOA. To prove the potentiality of the suggested technique, the results have been compared with the familiar classical MOR techniques as well as other heuristic algorithms available in the literature.
International Journal of Advanced Engineering Research and Science , 2017
Rotating shaft is a vital element in power stations like Gas power stations, steam power station ... more Rotating shaft is a vital element in power stations like Gas power stations, steam power station and Tidal power stations. These shaft failure or break down lead to the consequences, ranges from annoyance to the financial disaster or human damage. Hence predictive maintenance which includes early detection, identification and correction of machinery problems is paramount to anyone involved in the maintenance of industrial machinery to insure continued, safe and productive operation. Condition monitoring of machines is become necessary to run the machines efficiently. Vibrations are caused due to unbalance in the rotating components, dry friction between the two mating surfaces, misalignments, imperfect of coupling or bearings, and cracks in the shafts or blades. In predictive maintenance, vibration monitoring and analysis is essential. Health of any rotating shaft can be identified by its signature includes number of peaks. The peaks in the spectrum or signature give the information regarding the type of fault. In this paper gives a overview on vibrations analysis and faults diagnosis in various rotating machine parts and also this paper attempts to epitomize the recent research and developments in rotating element vibration analysis techniques.
Journal of Mechanical and Mechanics Engineering, 2019
The investigation of this research work study the potential grains of quarry dust (QD), fly ash (... more The investigation of this research work study the potential grains of quarry dust (QD), fly ash (FA) and silicon carbide (Sic) as a reinforcements of this hybrid metal matrix composite. In this al-6063 alloy metal matrix hybrid composite the quantity consist of 4wt%, 6wt%, and 8wt% QD-FA-SIC respectively. The Brinell hardness, tensile nature, and compression of those hybrid composites has explore the results according to ASTM grades. The particle size, grain structural boundaries have been investigate by the help of computerized inverted metallurgical microscope. Influence of quarry dust and fly ash in the hybrid metal matrix composites has the good metallurgical and mechanical properties than unreinforced matrix. For the comparison of these, of reinforced the properties of unreinforced matrix to reinforced hybrid composite was evaluated under dry laboratory conditions.
Design Engineering, 2021
In the work, the corrosion behavior of AZ31 magnesium alloy composites in NaCl solution was syste... more In the work, the corrosion behavior of AZ31 magnesium alloy composites in NaCl solution was systematically investigated to determine the performance of SiC particulates reinforced with 2%, 3%, and 4 % weight fractions in AZ31.The influence of main essential phases of corrosion behavior was studied by Scanning Electron Microscope.The casted specimens of base alloy and composites were tested for pitting corrosion behavior using potentio dynamic polarization test. The effect of duration on the Corrosion Rate and the average corrosion rate for multiple years was calculated and reported.
International Journal of Advanced Research in Science, Engineering and Technology, 2016
Health monitoring and the analysis of damage in the form of crack in beam like structures are imp... more Health monitoring and the analysis of damage in the form of crack in beam like structures are important not only for leading safe operation but also retraining system performance. Since long efforts are on their way to find a realistic solution for crack detection in beam structures in this regard many approaches have so far being taken place. When a structure suffers from damages, its dynamic properties can change and damage leads to reduction in stiffness also with an inherent reduction in natural frequency. The objective of this paper is to lend a viable relationship between the modal natural frequencies for the different crack depth for that vibration analysis is carried out on a cantilever beam with two open transverse cracks on universal vibration apparatus. Modelling and simulation is established using commercially available finite element analysis software package ANSYS.The results obtained from simulation are validated with the result obtained from the experiment.
The present study is to evaluate the mechanical properties of aluminum metal matrix composite (AM... more The present study is to evaluate the mechanical properties of aluminum metal matrix composite (AMMC). An effort is made to enhance the mechanical properties like hardness, tensile strength, yield strength, % of elongation of AMMCs by reinforcing AA6061 matrix with Boron carbide (B4C) particles. AMMCs were made, AA6061 as matrix material and B 4 C as reinforcement material, through stir casting method. AMMCs with varying percentage by different wt. %, 1%, 2 %, 2.5%, 3%, 4%, 5%, 7.5%, 10%, 15%, 20% B 4 C were considered. A systematic study of the matrix metal and AMMCs were done to evaluate the mechanical properties (hardness, yield strength and tensile strength) in as cast and heat treated condition. It was observed that in comparison to the matrix metal, the precipitation kinetic was accelerated by adding the B 4 C particles. It was noticed that, mechanical properties are increase with the increase in wt. % of the reinforcement up to 4% B 4 C further addition there is a diminution in both the conditions. It was also thought-out that 4% B 4 C composite shows better mechanical (hardness, yield strength and tensile strength) properties and low % of elongation than all other compositions in both the conditions. Optical microscopy and Scanning electron micrographs were carried out to authenticate the mechanical properties of the matrix metal and AMMCs.
IJMPERD, 2020
Refrigerationisdefined as reducing the temperature of a consideredspace by removingheat. Domestic... more Refrigerationisdefined as reducing the temperature of a consideredspace by removingheat. Domestic, Commercial, Inustrial and Trasportrefrigeration are some of the applications. Phase change phenomena of the refrigerantwillprouce the coolingeffect in vapour compression refrigeration system and the coefficient of performance of the VCR system canbeincreased by using water cooled condenser, and by introducingshell &coilheatexchanger at the end of the compressor, and by sub-coolingusingheatexchanger at condenser inlet. Otherthanthese techniques, Fromliteratureitwasfound that Nano fluids have high heattransferpotential, increased thermal properties in comparisonwith the abovediscussedmethods. It was also observed that Nano lubrication will provide higher thermal conuctivity when compared to conventional refrigerants.Thispaperinvolvesexperimental investigation of introduction of Al2O3 nanoparticles in the lubricationoilknown as Nano-lubricant. The COP iscalculated at the different volume fractions and iscomparedwiththat of the base VCR system using R410a as refrigerant. The Nano-particles in lubricant improved the tribological characteristics whenintroduced in compressorVCR system which in turnreduced the compressorwork.
International Journal of Latest Engineering Science, 2019
Al-6063 alloy is used as a matrix material and agro waste of cotton shell(CSA) ash and silicon ca... more Al-6063 alloy is used as a matrix material and agro waste of cotton shell(CSA) ash and silicon carbide(SIC) is used as hybrid-reinforcement with a percentage of 0 wt%,1 wt%, 2 wt%and 3% by using stir casting methodology. The hybrid-composites (HC) are fabricated by thereinforcement with 75 μm. The hybridcomposite accommodate with the 1wt%, 3wt% and 3 wt% CSA-SIC with percentage(%) of 3:1 respectively thoseareproduced by the bottom pouring stir-casting method.The fabricated hybrid composite is supervise various tests to evaluate the mechanical properties like lower-density, porosity, hardness and wear behavior was observed and analyze the process parameters and their influence ofcotton shell ashThe particle size,surface structure, grain-structural boundaries have been investigatingwith Trinocular metallurgical microscope the help of computerized inverted metallurgical microscope. Effect of CSA-SIC as a reinforcement of particular emphasis the result were compared with basic matrix material.
Journal of Materials Engineering and Performance, 2022
In this paper, a Whale Optimization Algorithm (WOA) is proposed for the optimization of tribologi... more In this paper, a Whale Optimization Algorithm (WOA) is proposed for the optimization of tribological parameters of AZ31-SiC metal matrix composite. Experiments were carried out by the surface of pin with the different loads of 10, 20, 30 N, velocities of 0.5, 1.0, 1.5 m s 21 and sliding distances of 500 m, 750 m, 1000 m respectively for optimization. The equations derived from the regression analysis are considered as objective functions to find the optimal parameters of wear and coefficients of friction (COF) using WOA. Considering these objective functions, the WOA is used to optimize the tribological parameters. The optimized parameters obtained from the WOA are compared with the parameters derived from PSO, DE, FFA and experimental results. The optimum wear values obtained from WOA, PSO, DE, FFA and experiment results are 3.55, 3.63, 3.60, 3.57 and 3.77 mg respectively. The optimum values of COF obtained from WOA, PSO, DE, FFA and experiment results are 0.311, 0.313, 0.314, 0.312, and 0.33 respectively. The optimum wear values obtained from WOA, PSO, DE and FFA are 6.01, 3.89, 4.69, 5.48% lower than the experimental value. The optimum COF values obtained from WOA, PSO, DE and FFA are 5.76, 5.15, 4.85, 5.45% lower than the experimental value. It is evidence from the results that WOA has provided the best wear and COF values for AZ31-SiC metal matrix composite when compared to other methods. This proposed method reduces the time and effort of the manufacturer to use the composite material in an application with the optimum operating condition for more life. The microstructural SEM micrographs reveal the distribution of reinforcement in the composite. The SEM micrographs of worn out surfaces present various wear mechanisms of the composites under variety of operating conditions.
Silicon, 2021
The present work aims to develop an AZ31D magnesium alloy-based composite with SiC reinforcement ... more The present work aims to develop an AZ31D magnesium alloy-based composite with SiC reinforcement at 1,2,3 and 4 wt.% using the stir casting route. The micro-structural changes of AZ31D/SiC composites were studied using SEM with energy dispersive spectrometry (EDS) and electron backscattered diffraction (EBSD). The addition of SiC reinforcement notably reduces the grain size of AZ31D Mg matrix. The SiC addition was seen significant change on the microstructure of AZ31D composites which induced improved mechanical properties. The AZ31D composite with 4% SiC reinforcement shows the highest compressive strength of 380.20 MPa. The hardness of AZ31D composite improved to 29% by the addition of 4% of SiC particles. The fractured tensile specimen surfaces of alloy and composites were studied, including fracture types, fracture mechanisms, and reinforcements on the fracture of AZ31D Mg composites.The homogeneous dispersion of refined SiC particles and effective load transfer between the reinforcement and matrix alloy appears to be responsible for the improved properties of AZ31D composite.
International Journal of Advanced Engineering Research and Science, 2017
Rotating shaft is a vital element in power stations like Gas power stations, steam power station ... more Rotating shaft is a vital element in power stations like Gas power stations, steam power station and Tidal power stations. These shaft failure or break down lead to the consequences, ranges from annoyance to the financial disaster or human damage. Hence predictive maintenance which includes early detection, identification and correction of machinery problems is paramount to anyone involved in the maintenance of industrial machinery to insure continued, safe and productive operation. Condition monitoring of machines is become necessary to run the machines efficiently. Vibrations are caused due to unbalance in the rotating components, dry friction between the two mating surfaces, misalignments, imperfect of coupling or bearings, and cracks in the shafts or blades. In predictive maintenance, vibration monitoring and analysis is essential. Health of any rotating shaft can be identified by its signature includes number of peaks. The peaks in the spectrum or signature give the information regarding the type of fault. In this paper gives a overview on vibrations analysis and faults diagnosis in various rotating machine parts and also this paper attempts to epitomize the recent research and developments in rotating element vibration analysis techniques.
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Papers by Dr. K.Ch.KISHOR KUMAR