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Evaluating the Von Mises Effect of HSS Twist Drilled Hole on Untreated Sandwich Composites by FE Analysis

Journal of The Institution of Engineers (India): Series D 2024年 1-8页

作者： Nagamadhu, M. Sathishkumar, S. Pushpavathi, S.M. Prasad, Shikandar Patil, Sachinkumar Hrishikesh Kumar, Prakash Kivade, S.B. Department of Mechanical Engineering BMS Institute of Technology and Management Karnataka Bangalore560064 India Department of Mechanical Engineering Rajiv Gandhi Institute of Technology Karnataka Bengaluru560032 India Department of Mechanical Engineering Government Engineering College Karnataka Ramanagar562159 India Department of Mechanical Engineering Government Engineering College Nawada India School of Mechanical Engineering Reva University Karnataka Bengaluru560064 India Department of Mechanical Engineering Gaya College of Engineering Gaya India Department of Metallurgical and Materials Engineering National Institute of Technology Jamshedpur Jamshedpur India Department of Mechanical Engineering Sri Jayachamarajendra College of Engineering Karnataka Mysore570017 India

The combination of strength, rigidity, and low weight is the biggest benefit of composite materials. Manufacturers are able to create characteristics that precisely match the specifications for a specific structure for a specific purpose by selecting the right mix of reinforcement and matrix material. However, drilling causes a variety of damage to composite plates, such as extrusion or delamination, fibre/matrix delamination, cracks in the lamellas or thermal damage. Flaking is caused by cutting forces that press into the ground and cut the material against the groove surface. The present wok focuses on analysing drilling processing parameters, a JFRPPU-foam sandwich composites to minimum the delamination. This sandwich composite modelled discretized by means of finite element solver ANSYS with SOLID85 elements. Analysis in this model, for different von Mises stresses and deflection of plate under a force, is determined with the help of ANSYS. The stress distribution effect around the hole is determined with modelled results. The high speed steel twist drilling hole results show lower stress found for an load of 105 N, drill diameter 4 mm, speed of 500 rpm, and feed rate of 80 mm/min in untreated sandwich composite. Also, it was observed that untreated composite structures show lesser delamination between interface of foam and face sheet, due to better interfacial bonding. © The Institution of Engineers (India) 2024.

关键词： Plates (structural components)

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Recycling waste tires into sustainable biofuel for replacing petroleum fuel in diesel engines using nanoparticles and biohydrogen

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Environmental Science and Pollution Research 2024年第52期31卷 61835-61844页

作者： Dewangan, Ashish Ahmad, Aqueel Yadav, Ashok Kumar Department of Mechanical Engineering Galgotias College of Engineering and Technology Greater Noida India Dehradun India Department of Mechanical Engineering Raj Kumar Goel Institute of Technology Ghaziabad India

In this paper, the production of pyrolyzed oil in lab scale plant and its possible use in variable speed diesel engine with nanoparticle and secondary fuel oxy-hydrogen gas is investigated. The pyrolyzed oil is produced from waste tires in lab scale plant, and after its distillation, it is blended with neat diesel in the proportion of 20:80 (TDF). The different testing fuels are prepared by mixing nanoparticle CeO2 (NP) at the concentrations 50 ppm and 100 ppm with blended fuel (named as TDF-NP50 and TDF-NP100). While in the testing phase, the HHO gas is supplied through specially designed venturi at fixed flow rate (fuel designated as TDF-NP50-HHO and TDF-NP100-HHO). The focus of current investigation is to investigate the combined impact of inducting HHO with nanoparticle mixed pyrolyzed blends on engine performance and emissions characteristics. The pyrolyzed blended fuel deteriorate the BTE, BSFC, emissions of HC and NOx while improves the CO emission. The improvement in all the characteristics can be achieved by introducing CeO2 nanoparticle at 50 ppm and 100 ppm which improves BTE by 15–24%, BSFC by 2.2–4.2%, HC by 8–18%, CO by 7–12%, and NOx by 7–16%. The further improvement can be achieved by inducting HHO gas, which are BTE 11%, BSFC 5–8%, HC 15%, and CO 13–16%. However, the NOx emission is increased by 14–17%. Hence, the waste tire-derived pyrolyzed oil along with green hydrogen and nanoparticles CeO2 can be used as a sustainable transportation fuel in existing CI engine. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Effluent treatment

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Thermophysical properties of TiO2/CuO hybrid nanofluids for heat transfer applications

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Materials Research Innovations 2024年第2期28卷 83-93页

作者： Mande, Ravi Kumar Rama Raju, Sita Varma, K. P.V. Krishna Research Scholar Department of Mechanical Engineering JNTUH College of Engineering Telangana Hyderabad India Department of Mechanical Engineering Geethanjali College of Engineering and Technology Telangana Hyderabad India Department of Mechanical Engineering Geethanjali College of Engineering Anurag University Telangana Hyderabad India Mechanical Engineering Raghu Engineering College Andhra Pradesh Visakhapatnam India

Hybrid nanofluids are emerging as a new generation fluids because of their enhanced heat transport properties. In this work, thermal transport properties were investigated for TiO2/CuO hybrid nanofluids. Morphological characteristics were studied using SEM (Scanning Electron Microscopy). Elemental composition and average crystallite size were determined using XRD (X-ray Diffraction) and EDX (Energy Dispersive Spectroscopy). Hybrid nanofluids were produced by suspending TiO2/CuO nano powder of 1–50 nm into the water. Three different concentrations (0.01%, 0.03% and 0.05%) of the hybrid nanofluids were prepared. Thermal transport properties like density, viscosity, specific heat and thermal conductivity were assessed experimentally. The results depict that the thermal conductivity was enhanced by 65.8% in contrast to the base fluid at a volume concentration of 0.05%. Density, as well as dynamic viscosity, of TiO2/CuO hybrid nanofluids at 0.05% concentration is increased and specific heat is decreased with the increase in volume concentration. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Scanning electron microscopy

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A review of emerging hydroforming technologies: design considerations, parametric studies, and recent innovations

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Journal of engineering and Applied Science 2024年第1期71卷 205页

作者： Chinchanikar, Satish Mulik, Harsh Varude, Param Atole, Sameer Mundada, Neha Department of Mechanical Engineering Vishwakarma Institute of Technology Maharashtra Pune India Department of Mechanical Engineering Vishwakarma Institute of Information Technology Pune India

Hydroforming is a modern metal-forming process prominently used in the shipbuilding, aerospace, and automotive industries for forming lightweight, complex-shaped geometries due to their inherent process benefits. But this process faces challenges such as limited material selection, high tooling costs, and complex process control for obtaining a defect-free part with uniform thickness. Researchers are constantly innovating and advancing hydroforming technologies to overcome these limitations. This work reviews emerging tube and sheet hydroforming technologies, considering parametric effects and design considerations, particularly for micro-domain applications. Further, a wider acceptance of the hydroforming process in different industries is explored by discussing the studies that tried to improve the efficiency and quality of the hydroforming process. This study observed that better formability could be achieved in hydroforming with appropriate intermediate heat treatment, proper lubrication, the correct design of loading paths, and temperature distribution. In tube hydroforming, wrinkles, necking, and cracking observed to be largely reduced by properly selecting the internal pressure and feeding. The precise protrusion height and uniform thickness at different joint cross-sections in tube forming are found to be significantly influenced by the strain-hardening exponent, loading path, and friction coefficient. Electrohydraulic forming is found being increasingly used due to its higher productivity and lower product cost. However, further research is required to achieve complex sheet geometries with sharp corners. This research emphasizes that advanced research, artificial intelligence integration, and the exploration of alternative materials can improve the performance of the hydroforming process. © The Author(s) 2024.

关键词： Automotive industry

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Utilization of Wind Tunnels for Subsonic and Transonic Flow for Aeronautical and Non-aeronautical Applications: A Review

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Journal of The Institution of Engineers (India): Series C 2024年第4期105卷 921-931页

作者： Yarlagadda, Sai Sravan Sikha, Siddharth Sriram Pandey, Gaurav Kumar Varshith, Pedi Reddi Gundabattini, Edison School of Mechanical Engineering Vellore Institute of Technology Vellore632014 India Department of Thermal and Energy Engineering School of Mechanical Engineering Vellore Institute of Technology Vellore632014 India

Wind tunnels are built with a certain function in mind and a certain speed range in mind. In this paper, the utility of wind tunnels for varied flow conditions which affect forces on the objects is discussed. As time progresses, more work is being done on wind tunnels which reflects a skilful combination of technology whose roots are based on principles of wind tunnels. Facility characteristics, the principles of operation and therefore the evolution of wind tunnels came to be as they are in today’s world are reviewed. Computational analysis, design criteria and flow physics for subsonic and transonic flows are discussed in this article for closed section testing. Subsonic flow around a circular cylinder and transonic flows over a lambda wing is taken as specific cases. The developed analytical models and closed-circuit wind tunnel tests are compared to validate. The average value of drag coefficient in a circular cylinder subsonic flow indicated a 25–9% variation between the numerical models and the wind tunnel in the specific range of fluid flow (Re). The average value of pressure suction coefficient in a circular cylinder subsonic flow indicated a 27 to − 6% variation between the numerical models and the wind tunnel in the same range of fluid flow. The flow topologies measured using different turbulence models are in good agreement with the schlieren images obtained through the wind tunnel testing for a transonic flow over a lambda wing. © The Institution of Engineers (India) 2021.

关键词： Wind tunnels

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Thermal performance evaluation and multi-objective optimization of a hybrid system integrating biogas gas turbine, CO2 cycles, cold energy recovery, cooling and hydrogen production

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International Journal of Hydrogen Energy 2025年 144卷 760-772页

作者： Khanmohammadi, Shoaib Soyturk, Gamze Kizilkan, Onder Department of Mechanical Engineering Kermanshah University of Technology Kermanshah Iran Department of Mechanical Engineering Faculty of Technology Isparta University of Applied Sciences Isparta32200 Turkey

This research presents thermodynamic analysis and optimization of a biogas-fed integrated plant designed to generate power, cooling, and hydrogen (H2) simultaneously. Utilizing biogas as the mainly energy resource, the system integrates power generation with an organic Rankine cycle (ORC), cooling through absorption refrigeration (ARS), and H2 generation via steam reforming. The research focuses on maximizing energy efficiency by conducting both energetic and exergetic analyses while advanced optimization techniques are applied to define the optimal working conditions. According to the analysis results, the gas turbine (GT) cycle produces 33233 kW, the supercritical carbon dioxide (sCO2) cycle 5159.5 kW, the liquified natural gas (LNG) turbine 1000.7 kW, and the transcritical carbon dioxide (tCO2) cycle 498.02 kW. The cooling cycle power output is 473.52 kW. It was also concluded that the H2 production of the hybrid plant is 7.265 kg/h. The analysis results stated that the hybrid system's most destructive part was the combustion chamber (CC), which had 61 % (27029 kW). Additionally, the sustainability index (SI) analysis shows that the sCO2-BC pressure ratio and the GT pressure ratio significantly impact SI. According to the optimization results, the optimum conditions of the biogas-fed trigeneration system were determined using a multi-objective optimization method. It was found that in the selected optimum condition, the total energetic efficiency and exergy destruction rates are 50.69 % and 42590.74 kW. The consideration of scatter distribution of the decision variable offers that selecting the sCO2 pressure ratio (PR) in the upper bound of the allowable range can improve both total energy efficiency and exergy destruction ratio as objective functions. © Hydrogen Energy Publications LLC

关键词： Exergy

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Noise effects, analysis and control in hospitals - A review

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Noise and Vibration Worldwide 2024年第3期55卷 123-134页

作者： Raghuwanshi, Naresh K Yadav, Sarvesh Kumar Jayaswal, Pratesh Parey, Anand Department of Mechanical Engineering Malaviya National Institute of Technology Jaipur Jaipur India Department of Mechanical Engineering Madhav Institute of Technology and Science Gwalior Gwalior India Department of Mechanical Engineering Indian Institute of Technology Indore Indore India

Noise pollution is a growing problem in hospitals. Noise is a common complaint among hospital staff, patients, and their families in hospitals. Research shows the negative impact of noise on patients. The common effects of noise on patients and staffs in hospitals are annoyance, irritation, high blood pressure, stress, poor mental health, and fatigue. But peoples are unaware about these effects. There are different noise sources in the hospitals e.g., medical equipment, talking of patient’s family members, staff conversation, opening-closing doors etc. There is need to control the noise level in the hospitals from the above noise sources. In this review paper, the noise effects on patients, noise sources in hospitals and noise controlling strategies are summarised and discussed. The aim of this review work is to increase the awareness about the noise effects on human health and show the actual condition of the hospital noise. Further, to increase the researcher’s curiosity to do in-depth research on noise pollution and control in hospitals. © The Author(s) 2024.

关键词： Hospitals

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Model for atomization droplet size and energy distribution ratio at the distal end of an electrostatic nozzle

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Frontiers of mechanical engineering 2024年第5期19卷 33-58页

作者： Dongzhou JIA Keke JIANG Yanbin ZHANG Zhenlin LV Changhe LI College of Mechanical Engineering and Automation Liaoning University of TechnologyJinzhou 121001China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China

Electrostatic atomization minimum quantity lubrication(EMQL)employs the synergistic effect of multiple physical fields to atomize minute quantities of *** innovative methodology is distinguished by its capacity to ameliorate the atomization attributes of the lubricant substantially,which subsequently augments the migratory and infiltration proficiency of the droplets within the complex and demanding milieu of the cutting *** with the traditional minimum quantity lubrication(MQL),the EMQL process is further complicated by the multiphysical field *** presence of multiple physical fields not only increases the complexity of the forces acting on the liquid film but also induces changes in the physical properties of the lubricant itself,thus making the analysis of atomization characteristics and energy distribution particularly *** address this objective reality,the current study has conducted a meticulous measurement of the volume average diameter,size distribution span,and the percentage concentration of inhalable particles of the charged droplets at various intercept positions of the EMQL nozzle.A predictive model for the volume-averaged droplet size at the far end of the EMQL nozzle was established with the observed statistical value F of 825.2125,which indicates a high regression accuracy of the ***,based on the changes in the potential energy of surface tension,the loss of kinetic energy of gas,and the electric field work at different nozzle orifice positions in the EMQL system,an energy distribution ratio model for EMQL was *** energy distribution ratio coefficients under operating conditions of 0.1 MPa air pressure and 0 to 40 kV voltage on the 20 mm cross-section ranged from 3.094‰to 3.458‰,while all other operating conditions and cross-sections had energy distribution ratios below 2.06‰.This research is expected to act as a catalyst for the progression of EMQL by stimulating innovation in the sp

关键词： atomization performance EMQL energy distribution PIV observation sustainable manufacturing

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EXPERIMENTAL AND REGRESSION ANALYSIS OF COMPRESSION IGNITION ENGINE POWERED BY DIESEL SURROGATE FUEL FROM USED LUBRICATING OIL USING MICROWAVE PYROLYSIS

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International Journal of Energy for a Clean Environment 2024年第7期25卷 43-60页

作者： Nasim, Mohammad Nematullah Suryawanshi, Satish J. Yarasu, Ravindra Babu Department of Mechanical Engineering Anjuman College of Engineering and Technology Maharashtra Nagpur440001 India Department of Mechanical Engineering MVPS’s KBT College of Engineering Nashik Maharashtra India Department of Mechanical Engineering Government College of Engineering Maharashtra Nagpur India

Fossil fuels are depleting rapidly, and the search for alternative fuels has become inevitable. The researchers investigated the usage of surrogate fuels for internal combustion engines due to the high demand for diesel fuel in all sectors. Diesel surrogate fuels (DSFs) from used lubricating oil seem to be a solution for the future. The disposal of used lube oils poses a major environmental issue that affects the entire planet. This study aims to anticipate the exhaust emissions, brake-specific fuel consumption (BSFC), and brake thermal efficiency (BTE) of a compression ignition engine powered by blends. The blends used are B10 (DSF10% + diesel 90%), B20 (DSF20% + diesel 80%), B30 (DSF30% + diesel 70%), and B50 (DSF50% + diesel 50%) of DSF with diesel through microwave-assisted pyrolysis of used lubricating oil as fuel. Experimental findings were applied to predict each condition’s performance characteristics. To estimate the performance characteristics, regression analysis was employed using experimental data in Microsoft Excel and Design Expert-12 software. The experimental data were compared to the simulated data. It was observed that fuel obtained from used lubricating oil using microwave-assisted pyrolysis could be used to power diesel engines without making any changes to the existing engines because the chemical characteristics of the diesel surrogate fuel were almost identical to those of diesel. The BTE of a compression ignition engine with DSF was close when compared to diesel up to full loading condition. At 1.924 kW brake power, the DSF30% has a higher efficiency than the other three blends. It was also observed that the rise in brake power also raises BSFC, thereby lowering thermal efficiency. © 2024 by Begell House, Inc. ***.

关键词： Diesel engines

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Influence of high magnetic field on surface roughness and temperature of Inconel 718 in dry turning operation with SiAlON ceramic cutting tool

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International Journal of Machining and Machinability of Materials 2024年第3期26卷 267-280页

作者： Waghmode, Sukhdev B. Kallol, Anupama N. Doiphode, Rajendra L. Shinde, Deepak M. Department of Mechanical Engineering Gogte Institute of Technology Belgavi India Department of Mechanical Engineering Government Polytechnic Kolhapur India Department of Mechanical Engineering Government Polytechnic Ratnagiri India

In this research work, the high magnetic field is applied on a single-point silicon aluminium oxynitride (SiAlON) ceramic cutting tool during the turning process of Inconel 718 (In718) to check its effect on surface roughness, tool temperature, and tool wear at different cutting speeds. A neodymium magnet is used to apply the magnetic field. The machining parameters selected for experimentations are speed – 5 levels, and magnetic field – 11 levels. In the experiment, Lorentz force is developed which helps for improvement of surface roughness. The experimental results showed that tool marks caused by the tool vibration are highly reduced, resulting in improvements in surface roughness. Moreover, because of the magnetic field fine particles are removed from the cutting zone resulting in decreased tool wear. Magnetic field affected on thermal conductivity of In718 which causes tool temperature is decreased but in the case without magnetic field machining temperature is increased as speed increases. Copyright © 2024 Inderscience Enterprises Ltd.

关键词： Lorentz force

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