Prefacedoi: 10.1088/1757-899X/624/1/011001pmid: N/A
The Year 2019 is historical for the Indian Institute of Technology Madras, India as it celebrates its Diamond Jubilee, and also received National Rank No.1 for the best engineering institution in the country for the fourth consecutive year. The faculty of the Department of Mechanical Engineering, IIT Madras, ranked in the group 51 – 75 in the Shanghai World Ranking, carries out cutting edge research work in the broad areas of Design, Manufacturing and Thermal streams. Founded in 1968, the Machine Design Section, formerly Machine Elements and Mechanical Handling Laboratory, is well known in India and abroad for decades for its contribution in the advancement of Machine Element Design, Design Optimization, Advanced Materials and Design, Health Monitoring, Tribology, and Sound, Machine Dynamic and vibration.The research on design and development of mechanical power transmission elements in the modern era has moved to a new dimension with the availability of modern materials such as customizable composites, light weight metals, lubricating polymers, nano-materials, etc, design tools and methods for efficient product and system design, and integrated design and manufacturing methods such as additive manufacturing, surface modification, etc., The increasing demand of the society for reliable and comfortable modern mobility engineering involving hybrid and electrical drive systems where mechanical power transmission elements play a significant role directs the researchers and designers to look for newer materials, manufacturing routes, design tools and testing for better performance.This conference, first in the series, is organized by the Machine Design Section of the Department of Mechanical Engineering, IIT Madras as part of the Diamond Jubilee celebrations of the IIT Madras, from where significant contributions have been made in this area. As the conference theme is highly specialized and limited research is happening all over the World, it is proposed to have a mixture of eminent senior researchers delivering invited lectures and young researchers presenting contributory papers. The conference is mainly intended to facilitate interaction with lead researchers and expose emerging emerging areas to the young researchers in the following themes:• Gears, Bearings and Other Drives – Design, Manufacturing and Performance• Design Optimisation• Advanced Materials & Treatments• Life Testing, Reliability, Failure mechanisms, Fault Diagnostics, and Prognostics• Lubrication Engineering, Noise, Vibration, and HarshnessThe reviewing team have contributed a lot in looking in to the quality of the contributory papers and accepted only one third of the abstracts received.We acknowledge the support provided by the reviewers, administration and volunteers and thank all the participants who have come from many reputed institutes in India and abroad.We wish everyone an enjoyable and enlightening stay at IIT Madras.Prof. R GnanamoorthyProf.ShankarKrishnapillaiDr. Piyush Shakya
Peer review statementdoi: 10.1088/1757-899X/624/1/011002pmid: N/A
All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
Investigation on modal behaviour of FGM annular plate under hygrothermal effectSharma, Pankaj; Singh, Rahul
doi: 10.1088/1757-899X/624/1/012001pmid: N/A
This paper investigates modal characteristics of FGM annular plate under hygrothermal effect. The mechanical properties are supposed to have a continuous variation along the thickness of the plate. The power law or sigmoid law functions are used to govern the resultant mechanical properties. The MUMPS eigen solver which is exists in COMSOL Multiphysics® (version 5.2) software is employed to obtain the eigenfrequencies and corresponding mode shapes. The accuracy of the method is validated by comparing the results with the results published work for particular case. Effects of functionally graded index, radius- to-thickness ratio, and temperature and moisture changes on the natural frequencies are discussed in detail. An excessive stress due to drastic moisture and temperature gradients make the engineering structures susceptible to failure. Due to the fact that, continuously identified natural frequencies of vibration under temperature and moisture effect can provide unique information during both initial fabrication and service life of different mechanical structures. Hence, this study can be helpful directly or indirectly in development of highly efficient environmental sensors that are very necessary in a structural health monitoring perspective. It can be observed that the fundamental frequency decreases with increase in functionally graded index and the moisture content rise under the power law model whereas under sigmoid law model the frequencies remain almost constant with increase in functionally graded index.
Development of Self-Propelled Material Handling SystemWalke, G A; Rivankar, S N; Verlekar, S P
doi: 10.1088/1757-899X/624/1/012002pmid: N/A
Material handling system is the vital pillar of manufacturing industries like food, textile, automobile, wood, and other batch type manufacturing system. Research carried out in past shows that material handling accounts for 36% of production cost. A novel material handling system is developed to cut the cost of material transfer and risk of injury. The proposed system consists a mechanism which can self-propel itself and effect the transfer of raw material from one place to another on a shop floor. Since the system is self-propelled, it eliminates external power source in contrast to other material handling systems. The newly developed material handling system utilizes gravitational potential energy of the material loaded on the system to get self-propelled along a straight line. The system returns to original position by retracing the path after unloading the material at the destination. The system not only reduces the energy consumption for material handling but also reduces risk of injury by reducing human interference. It can be used in small and medium size enterprise (SME) to cause improvement in productivity of plant which has limitation on utilization of resources like labour, energy, land and capital.
Nonlinear parameter estimation in damping with volterra series through harmonic probingChintha, Hari Prasad; Chatterjee, Animesh
doi: 10.1088/1757-899X/624/1/012003pmid: N/A
In this work nonlinear system identification procedure, based on Volterra series, is presented to distinguish a damping nonlinearity from stiffness nonlinearity, using measured first and third harmonic amplitude characteristics. First and higher order volterra kernel synthesis formulations and frequency response functions (FRFs) have been developed in damping and stiffness nonlinearity. The characteristics of first and higher order harmonic amplitudes at various excitation level is studied for the both the nonlinearity. This paper shows comparison study between the Volterra series, Runge-Kutta fourth order in analysis of damping and stiffness nonlinearity in the mechanical systems. Nonlinearity can lead to various system behaviour, like jump phenomenon, stable and unstable region, super harmonic resonances. Using first and higher order harmonic amplitudes, formulated from Volterra series response representation, nonlinear parameters are estimated through the recursive iteration method.
Power loss prediction in asymmetric spur gear considering gear tooth dynamic loadThomas, Benny; Sankaranarayanasamy, K; Ramachandra, S; Suresh Kumar, SP
doi: 10.1088/1757-899X/624/1/012004pmid: N/A
In many gear drives, one side of the flank is subjected to relatively higher load for a longer duration than the other side. Asymmetric spur gears with drive side pressure angle higher than the coast side reflects this functional difference. Conventional design criteria and procedures followed for symmetric spur gears are suitably modified and applied to predict the gear tooth bending, contact stress and power loss in asymmetric spur gears. Quasi-static gear tooth load and empirical friction coefficient formulae were applied in the past to predict the sliding power loss in asymmetric spur gears. In the present work, Finite element method is used to determine the time varying mesh stiffness of the normal contact ratio asymmetric spur gear tooth. Computed gear tooth stiffness is used to predict the dynamic load at two different speeds under non-extended contact condition. Sliding power loss during the course of meshing is analytically calculated under quasi static and dynamic load conditions. Study demonstrates the difference in sliding power loss computed based on friction formulae and empirical friction coefficient formulae under static and dynamic load.
Assessment of structural behavior of torque converter dampenerDas, Ujjwal Kumar; Victoria, Vinogradov; Bhaskara, Ch
doi: 10.1088/1757-899X/624/1/012005pmid: N/A
A Torque Converter Dampener is a primary component for transmittal of power between the Engine and the Transmission. It comprises of three major components – driving cage plates, driven cage plates and set of springs. Being a spring based system, it provides a smooth conversion of torque from engine to the driveline. When the vehicle performs a gearshift, these springs damp the driveline oscillations and they get locked when the vehicle runs at a higher speed. A Torque Converter Dampener assembly is typically subjected to high torque and centrifugal loading and sometimes, there is a chance of breaking of the springs under operating loading conditions. This paper explains detailed method of analyzing Torque Converter Dampener using Finite Element Analysis. Cage plates and springs are modeled accurately with interactions and boundary conditions properly defined similar to actual hardware, in order to capture the physics of the system. As the problem is highly complex in nature, material non linearity, temperature effect and effect of dynamic fluid pressure are not taken into consideration. The analysis process takes care of the spring’s installation followed by applying centrifugal force and torque in alternating sequence. Similar method is repeated for different spring orientation to find out the worst case model and loading sequence. High stress locations on springs and Driving/Driven cage plates are identified and correlated with the actual hardware test results.
Study of the lubricating properties of hybrid liquid paraffin with TiO2 and CuO as nano-additives for engine oil applicationShah, Adarsh Kumar; Vineesh, K P; Joy, M L
doi: 10.1088/1757-899X/624/1/012006pmid: N/A
Mineral based paraffin oil (L14480) lubricant finds it difficult to give optimum characteristics for modern engine application. In this work, possibility of hybrid paraffin oil which consists of paraffin oil (PO) and sesame oil (SESO) in equal proportions to be used for engine oil application is investigated. Properties of hybrid paraffin oil and SAE 20W40 were estimated and compared. Estimation of thermal characteristics of hybrid paraffin oil shows it have comparable properties with SAE 20W40. Low viscosity characteristics of hybrid paraffin oil can be improved by addition of EVA particles. Addition of TiO2 and CuO nanoparticles shows enough improvement in tribological properties of hybrid paraffin oil. Poor oxidative stability of hybrid paraffin oil can be improved by addition of butylated hydroxytoluene (BHT).
Dynamic characteristics analysis of a lead screw by considering the variation in thread parametersSyriac, Alex S; Chiddarwar, Shital S
doi: 10.1088/1757-899X/624/1/012007pmid: N/A
A lead screw is a mechanical transmission device which transforms rotary motion into translational movement. The main elements are screw and nut which establishes connection among them by the means of threads on respective element. It plays a major role in transferring the load between screw and nut during the travel stroke. This paper investigates the behavior of the lead screw, inside the withdrawal part of the circuit breaker of switchgear, by analyzing the mechanical response of the lead screw system. The various thread parameters such as thread pitch, nominal diameter etc. play an important role in force transmission as well as in overall efficiency of the mechanical system. This study is done by creating models of various thread profile such a square thread, acme thread, trapezoidal thread and simulating the results in the finite element analysis software ANSYS Workbench. This paper focuses on the effect of the thread pitch, nominal diameter, helix angle, screw length on the stress state and deformation within the screw. Also, the influence of screw pitch, screw length and screw nominal diameter on the withdrawal part of the circuit breaker’s natural frequency along its whole stroke is carried out using modal analysis.
Numerical Simulation and Experimental Validation of Planetary gearbox System Design to Govern Constant Generator Speed in Hydro Power PlantBhargav, ; Parameshwaran, M. A.; Sivaraj, S.; Venkataram, Nithin
doi: 10.1088/1757-899X/624/1/012008pmid: N/A
Micro Hydro Power Plant (MHPP) is a clean and renewable source of harnessing power ranging between 5kW-100kW. The reservoirs are avoided in MHPP and power house is directly placed in the path of the water stream. In India, there exists an abundant resources unutilized due to technical constraints. As the flow of the water stream varies, the input velocity of turbine also varies and so does the generator speed. Hence, the challenge lies in arriving at a gear arrangement to maintain constant generator speed. In the present paper, an auxiliary gearbox with planetary gearbox is designed to maintain constant generator speed for various input turbine speed. Based on these specifications, the planetary gear and auxiliary gearbox is designed through analytical calculations. The complete system is modelled to carry out Multi Body Dynamic simulation to verify kinematic analysis (analytical method) and FEA to analyse stresses developed in planetary gearbox system. The auxiliary unit and planetary gearbox is fabricated and tested for no load condition to maintain the constant generator speed. The test results are found to be close agreement when validated with the analytical method and multi body dynamic simulation results. Hence the designed system is practically feasible for maintaining constant generator speed for fluctuation turbine speed