MIT-World Peace University (MIT-WPU) is a top educational institute located in Pune, India. It is recognized within&nbsp;UGC under Government of Maharashtra Act No. XXXV 2017.&nbsp;

It is part of the MIT group of institutions (established in 1983) which covers 10+ campuses across India and has more than 50,000+ students enrolled across various disciplines at a given point of time. The institute houses 15 schools ranging from Engineering &amp; Technology, Design, Pharmacy, Commerce, Governance among others. It offers undergraduate, postgraduate and PhD programs among different disciplines.&nbsp;

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MIT World Peace University

School of Mechanical Engineering

Engineering and Technology

World University root node

Materials Today: Proceedings

Performance simulation of HFC-161 as an alternative refrigerant to HCFC-22 for room air conditioner

Single-point incremental forming (SPIF) process is an emerging sheet metal forming process in which constraint of using dedicated press tools is eliminated. Some process limitations like poor surface finish, longer forming time, higher geometrical error, and uneven wall thickness distribution restrict its applicability in sheet metal industry. But SPIF process with dummy sheet has the capability to overcome some of the prevailing limitations of SPIF process. In the present paper, influence of dummy sheet thickness, step size, wall angle, and feed rate on geometrical error in terms of root-mean-squared error (RMSE) of formed part is investigated. Box Behnken design is used to design the experiments. From the analysis of experimental result, it is found that dummy sheet thickness, step size, and wall angle are significant process parameters influencing RMSE. No significant influence of feed rate on RMSE is observed. RMSE increases with increase in dummy sheet thickness and wall angle, while it decreases with increases in step size. As feed rate increases, there is nominal decrease in RMSE which is desirable. So higher feed rate is recommended to reduce forming time. Further, empirical model is developed to predict RMSE. Also, optimization of process parameters is performed to minimize RMSE. Confirmation experiments were performed in order to check the accuracy of developed predictive model and it is found that predicted results are in good agreement with experimental results. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2021.

Lecture Notes in Mechanical Engineering

Experimental investigation on geometric error in single-point incremental forming with dummy sheet

In the present experimental work, hybrid incremental sheet forming (HISF) process comprising stretch forming followed by single point incremental sheet forming (SPIF) is developed for forming conical frustum. Experimental investigation is done to find the influence of process parameters on thickness distribution and localized thinning in the formed parts. Experimental result reveals that stretching has a substantial effect on localized thinning in formed parts. Small improvement in the thickness distribution and localized thinning is found in formed parts. Experimental investigation on the influence of preform tool shape is also done to further improve thickness distribution. It is observed that the geometry of preform tool and amount of stretching has a great influence on thinning and thickness distribution. It is found that intermediate preform tool size and small amount of preforming results in forming conical frustum having uniform thickness distribution. Also, a considerable reduction in forming time using developed HISF process is observed as compared to SPIF process alone. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2021.

Hybrid incremental forming: Investigation on localized thinning and thickness distribution in formed parts

The extensive use of composites materials has created disposal and environmental issues. With awareness of preserving the environment, the use of environmentally friendly, sustainable and biodegradable composites have been started. From few decades, natural fiber-reinforced composites (NFRC's) and bio-degradable resins are used extensively for automotive, construction and other applications. The hybridization of synthetic fiber with natural fiber has gained the attention of researchers. The axisymmetric components such as pressure vessel, driveshaft, storage tanks, pipes, etc. are fabricated by filament winding process. Commonly glass, carbon, aramid fibers are used for this process. The use of natural fibers is challenging in filament winding as these fibers are not continuous, hydrophilic nature, poor bonding with matrix, available geographically, less tensile strength as compare to synthetic fibers. This paper is intended to explore the potential of natural fiber for the filament winding process. High cellulose content and low microfibril angle (MFA) in plant fiber are responsible for the high strength of the natural fiber. Surface modification techniques improve the adhesion between fiber and matrix which results in improving the tensile strength of the composite. Few researchers used sisal, flax and jute fiber for the filament winding process. This paper contains, an outline of filament winding process parameters like fiber tension, winding pattern, winding angle, optimum winding pattern and potential of few plant-based natural fibers and their properties have been highlighted for filament winding process. Also, surface modification techniques to improve the tensile strength of a few plant-based fibers are also been discussed. The global composite pressure vessel synthetic material market is expected to grow at a Compound Annual Growth rate (CAGR) of 23% from 2017 to 2023. The development of a new hybrid composite made of natural and synthetic fiber suitable for filament winding need to be discovered. © 2021 Elsevier Ltd. All rights reserved.

Biodegradable composites for filament winding process

Turkish Journal of Computer and Mathematics Education

Investigation of key success factors for open innovation and firm performance in Indian IT and ITeS industry: A Systematic Literature Review

Review on Lean Manufacturing Elements in Manufacturing Industries 13 (Vol {\ldots}

Review on Lean Manufacturing Elements in Manufacturing Industries

Designing of fuel injection pipe for high fuel pressure and vibrations is most important for a diesel engine's safety and performance. The failure of the fuel injection pipe of a Diesel engine is critical when running at full load condition. This paper presents the mode shapes, natural frequencies and harmonic analysis of fuel injection pipes to identify the cause of failure. Finite element analysis is conducted to study dynamic behavior under a range of excitation frequencies. In these natural frequencies and mode shapes about the fuel, injection pipe is presented for different configurations. The methodology is prepared to avoid pipe failure by providing clamps at a proper location following modal parameters and providing sufficient damping in a fuel injection pipe assembly. Results indicate that excessive vibration amplitudes and incorrect clamp's location are responsible for failure (cracks in fuel injection pipes at the diesel engine's injector side). Different fuel injection pipe assemblies are discussed, control strategies and experimental results are presented to reduce vibration amplitude and stress. The existing fuel injection pipe assembly's overall vibration amplitude is reduced to 34.5 % and stress by 75 % through the modified assembly.

Journal of University of Shanghai for Science and Technology

Finite Element and Experimental Vibration Analysis of High-Pressure Fuel Injection Pipe for 8-Cylinder V Diesel Engine

In recent years, compressed natural gas (CNG) as a fuel for the automobile is overgrowing, as it is cheap and environmental friendly compared to gasoline and diesel fuel. To improve fuel efficiency, lightweight composite pressure vessel tanks are used for the storage of CNG. Due to high specific strength, fiber-reinforced composites are most widely used. Synthetic fibers like carbon, glass fiber are used for the fabrication of these pressure vessels. In the last few decades, due to environmental concerns, the hybridization of synthetic fiber with natural fiber has gained the attention of researchers. This paper focuses study on the effect of adding natural fiber on first ply failure (FPF) pressure based on the Tsai-Wu failure criterion. The laminate stacking sequence on first ply failure pressure for carbon/epoxy, E-glass/epoxy, and hybridization of these fibers with abaca fiber is studied. Abaca is strongest among other natural fibers as it contains high cellulose which is responsible for strength of the fiber. CNG tank with a 30-liter capacity, inside diameter 261mm, thickness 12 mm, applied pressure of 25 MPa with both ends closed is considered. Stacking sequence of symmetric laminate [(90)2/∓θ/(90)2]S, for different orientation of helical winding i.e. θ = 150,250,350,450,550,600,750 is analysed for these composite materials. A hybridtube made of synthetic and natural fiber with uniform thickness is considered. The simulation results of the first ply failure pressure are compared with theoretical results. Autodesk Helius Composite software is used for calculating material properties and, first, ply failure analysis. It is observed that burst pressure decreases as helical angle θ increases, and for the stacking sequence of [(90)2/∓150/(90)2]s burst pressure is maximum for all tubes. The Burst pressure of the hybridcarbon/Abaca tube reduces by 69.5% to 42%for winding angle between 150 to 450 compared to standard carbon tube. For hybridE-Glass/Abaca tube, burst pressure reduction was 21%to 4.7%for winding angle between 150 to 450 compared to standard E-Glass tube. For hybrid Carbon/Abacatube, the drop in burst pressure is less 23.7% to 1.74%,respectively, compared to carbon tube for helical angle in the range 550to 750.Slight improvement in burst pressure (1.14% to 7.5%) is observed for the helical angle between 550 to 750in the case of a hybrid E-Glass/Abacatu be compared to the E-Glass tube only. For the E-Glass tube, intermediate lamina can be replaced by Abaca fiber. Copyright © 2021 by ASME

ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)

First-Ply Failure Pressure of Symmetric Laminated Hybrid Composite CNG Tank

With recent developments and benefits of electrochemical machining (ECM) such as No destruction of Tool, machining capabilities for complex shapes on difficult-to-cut materials and high machining efficiency at low cost has increased use in several manufacturing components (like in Turbine blades, Compressor blisk) mainly in the manufacture of aero-engine components. In this article, focus has been given on the key factors for machining super alloys such high temperature titanium alloys (BuRTi) used in aero-engines for electrochemical machining (ECM), Tool Materials used, Machining profiles and their influencing parameters (Voltage, Electrolyte concentration and frequency of tool vibration), hybrid methods of electro chemical machining. It is observed that a wide scope exists to focus on the developments in electrochemical machining ECM for machining titanium alloys for complex profiles, also to predict Anode shape and Dissolution characteristics of new advanced difficult-to cut materials. It is further expected to focus on Machining Contoured or Curved profile on High temperature BuRTi titanium alloys using STEM. © 2021 Elsevier Ltd. All rights reserved.

Overview on electro-chemical machining of super alloys

Robotic systems are known for their precision and accuracy. To achieve a desired set of operating parameters the system must have a good control system. Robotic arms can vary in size shape and purpose of use. With increasing DOF (Degree of Freedom) the complexity of the system increases and hence a DAQ system is required to check various parameters of the process. This paper discusses the implementation of kinematic and inverse kinematic modelling of a 6 Degree of Freedom (DOF) hydraulic arm in MATLAB environment. The forward kinematic model is based on Denavit-Hartenberg parameters. To obtain a given set of position and orientation of end effector, inverse kinematics gives the required set of joint angles. Potentiometers mounted on arm joint are used as the prime feedback elements for extracting the joint angles. All six joints of the arm are revolute joints. The values of potentiometer obtained are compared to the desired input values. Proportional direction control valve is the main controlling element of the hydraulic circuit. The forward and inverse kinematics is validated and implemented in MATLAB robotics toolbox (developed by Peter Croke). A GUI is also used to ease the process of retrieving and feeding the information in the system. The results of forward and inverse kinematics from MATLAB are verified by the physical model discussed in this paper. © Published under licence by IOP Publishing Ltd.