Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Electrical energy is used to machine metals in electric discharge machining (EDM) process. EDM is a thermoelectric process, in which machining occurs without cutting force. Hence, electrical energy is converted to thermal energy to remove material. Usually, straight polarity is used in EDM, i.e., workpiece is connected to positive terminal (anode) and tool is connected to negative terminal (cathode). But, reverse can be possibly have rarely studied. An in-house designed table-top EDM was built to perform the experiments in straight and reverse polarity. Copper material was used as tool and workpiece to avoid the effect of different material. The voltage and polarity have significant effect on removal of material from workpiece. © 2021, Springer Nature Singapore Pte Ltd.

Department of Manufacturing Engineering

School of Mechanical Engineering

Vellore Campus

Department of Control and Automation

School of Electrical Engineering

Chennai Campus

Lecture Notes in Mechanical Engineering

Effect of Polarity on MRR and TWR in Electric Discharge Machining

Circular membrane backed by cylinder cavity configuration has encountered in various acoustical applications such as musical instruments, automotive horns, sensors and loud speaker design. Vibration Characteristics of membrane are important in understanding sound radiation behavior. Natural frequencies of membrane are influenced by the presence of acoustic cavity, and this interaction is named as structural-acoustic coupling. The coupled natural frequencies of the membrane are predicted using Mode Coupling approach. In this approach, the coupled system behaviour is expressed in terms of the finite number of uncoupled sub-system modes. Acoustic impedances of cavity and structural mobility of membrane are arranged in a matrix form. The matrix representation helps to do efficient computations. It also helps to find modes participation in coupling. The predicted results are corroborated with numerical results.

World University root node

2nd Australasian Acoustical Societies Conference, ACOUSTICS 2016

Structural-acoustic coupling of circular membrane backed by cylinder cavity using mode coupling approach

The objective of this study is to develop a genetic programming (GP) based model to predict constant amplitude fatigue crack propagation life of 2024 T3 aluminum alloys under load ratio effect based on experimental data and to compare the results with earlier proposed ANN model. It is proved that genetic programming can effectively interpret fatigue crack growth rate data and can efficiently model fatigue life of the material system under investigation in comparison to ANN model. © 2014 Elsevier B.V. All rights reserved.

Applied Soft Computing Journal

Prediction of constant amplitude fatigue crack growth life of 2024 T3 Al alloy with R-ratio effect by GP

Solid particle erosion behavior of short date palm leaf (DPL) fiber reinforced polyvinyl alcohol (PVA) composite has been studied using silica sand particles (200 ± 50 m) as an erodent at different impingement angles (15-90°) and impact velocities (48-109 m/s). The influence of fiber content (wt% of DPL fiber) on erosion rate of PVA/DPL composite has also been investigated. The neat PVA shows maximum erosion rate at 30° impingement angle whereas PVA/DPL composites exhibit maximum erosion rate at 45°impingement angle irrespective of fiber loading showing semiductile behavior. The erosion efficiency of PVA and its composites varies from 0.735 to 16.289% for different impact velocities studied. The eroded surfaces were observed under scanning electron microscope (SEM) to understand the erosion mechanism. © 2014 Jyoti R. Mohanty et al.