i-manager's Journal on Mechanical Engineering (JME)


Volume 4 Issue 3 May - July 2014

Research Paper

Mathematical Modeling of Tube-Support Fouling in Nuclear Steam Generators

Yasser Rihan*
*Associate Professor, Department of Mechanical Engineering, Atomic Energy Authority, Anshas, Egypt
Rihan, Y. (2014). Mathematical Modeling of Tube-Support Fouling in Nuclear Steam Generators. i-manager's Journal on Mechanical Engineering, 4(3), 1-8. https://doi.org/10.26634/jme.4.3.2724

Abstract

Particle deposition on steam generator tubes and supports is a complex phenomenon involving many mechanisms that interact. The approach taken in this paper was to characterize the two-phase flow patterns existing designs, correlate these with fouling patterns observed in the field, and develop a support fouling mathematical model to better understand the dynamics of the fouling mechanisms. A computer program was coded to predict the deposit is thickness in and near a support. This model has the same classic particle deposition models as in the larger codes, but considers additional factors such as stagnation zones and surface normal to the flow.

Research Paper

Design and Analysis of Connecting Rod of Die Pillar Station of Vacuum Thermoforming Machine

C.P. Gaikwad* , S.D. Kalpande**
* - ** Mechanical Engineering Department, MET Institute of Engineering & Research, Nasik, India.
Gaikwad, C., & Kalpande, S. D. (2014). Design and Analysis of Connecting Rod of Die Pillar Station of Vacuum Thermoforming Machine. i-manager's Journal on Mechanical Engineering, 4(3), 9-14. https://doi.org/10.26634/jme.4.3.2725

Abstract

The objective of this work is to design and analyze the performance of connecting rod, through a simple experimental model of Forming and Trimming Die Pillar Station of Vacuum Thermoforming Machine. A connecting rod is a machine member subjected to alternating direct compressive and tensile forces, where compressive forces are generally more in connecting rods so that it is considered for its prime safety. A parametric mathematical model of connecting rod is modeled using Pro-E Wildfire 4.0 Software and its Static Structural Analysis is carried on Ansys v-11.0 Workbench. FEA of connecting rod is done using C50 as its base material to determine its von-Misses stress, Max shear Stress, Total Deformation, and Alternating stress to cycles graph. Also, the Stiffness of connecting rod is calculated. Basically, the analysis is carried with four different element sizes such as 1 mm, 2 mm, 3 mm, and 4 mm and best element is selected indicating correct results.

Research Paper

A Simulation Approach to Analysis of Mixing Performance for Different Geometry of Microchannels

Sourav Acharya* , Apurbba Kumar Sharma**
* Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee.
** Associate Professor, Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee.
Acharya, S., & Sharma, A. K. (2014). A Simulation Approach to Analysis of Mixing Performance for Different Geometry of Microchannels. i-manager's Journal on Mechanical Engineering, 4(3), 15-20. https://doi.org/10.26634/jme.4.3.2726

Abstract

Mixing in microfluidics has become a pivotal issue in the field of Microelectromechanical systems. Mixing can be enhanced in microchannels by complicating the geometry of the channel. Different microchannel structures have been studied to analyse the mixing performance. In this paper, a numerical simulation has been done to compare the mixing performance of straight, serpentine, and three-dimensional serpentine microchannels with the help of ANSYS Fluent. The study shows that due to chaotic advection caused by the formation of secondary flows, the 3D serpentine microchannel shows better mixing performance.

Research Paper

Prediction of Ultimate Strength of Glass/Epoxy Tensile Specimen Using Acoustic Emission RMS Data

K. Krishnamoorthy* , T. Sasikumar**
* Research Scholar, Center for Research, Lord Jegannath College of Engineering and Technology, Kanyakumari, India.
** Professor, Department of Mechanical Engineering, Lord Jegannath College of Engineering and Technology, Kanyakumari, India.
Krishnamoorthy, K., and Sasikumar, T. (2014). Prediction of Ultimate Strength of Glass/Epoxy Tensile Specimen Using Acoustic Emission RMS Data. i-manager's Journal on Mechanical Engineering, 4(3), 21-26. https://doi.org/10.26634/jme.4.3.2727

Abstract

The objective of this research paper is to predict the ultimate strength of the glass/epoxy composite laminates using the online Acoustic Emission (AE) monitoring and Artificial Neural Networks (ANN). The laminates were made by six layered glass fiber (in woven mat form) with epoxy as the binding medium by hand lay-up technique, cured at room temperature 2 at the pressure of 30 kg/cm . Tensile specimens with ASTM D3039 standard dimensions were cut from the laminates. These specimens were subjected to uni-axial tension under the acoustic emission monitoring using 10 ton capacity universal tensile machine. The dominant AE parameters such as counts, energy, duration, RMS, ASL ,and amplitude are recorded during monitoring. The RMS value corresponding to the amplitude ranges obtained during tensile testing were used to predict the failure load of a similar specimen subjected to uni-axial tension well before its failure load.

Research Paper

Fabrication and Characterization of MMCs Using Stir Casting Method

Jeevan Singh Bisht* , Akshay Dvivedi**, Apurbba Kumar Sharma***
* Research Scholar, Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee.
** Assistant Professor, Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee.
*** Associate Professor, Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee.
Bisht, J. S., Dvivedi, A., & Sharma, A. K. (2014). Fabrication and Characterization of MMCs Using Stir Casting Method. i-manager's Journal on Mechanical Engineering, 4(3), 27-32. https://doi.org/10.26634/jme.4.3.2728

Abstract

Metal Matrix Composites have a great demand in the area of automotive, aerospace, and marine industries. It has exceptional properties like high strength, high hardness, lightweight, high corrosion resistance etc. Stir casting is one of the simplest and promising routes for manufacturing of metal matrix composites. In the present study, the Al6063-T5 alloy was reinforced with SiC abrasive particles in a weight ratio of 5%, 10%, and 15%. The mechanical properties such as tensile strength, macro-hardness, and impact strength of fabricated Al6063-T5-SiC MMCs were investigated for different weight fractions of reinforced SiC. The experimental investigation shows that the mechanical properties improve with increase in SiC weight percentage from 5% to 15%.

Case Study

Improvement of Process Performance and Calculation of 5S Activity in Organized Sector: A Case Study

Rohit K. Kandpal* , Ajay**
* Student, Manufacturing and Management Engineering, G.B.Pant University of Agriculture and Technology, Pantnagar, India
** Faculty, Industrial and Production Engineering, G.B.Pant University of Agriculture and Technology, Pantnagar, India.
Kandpal, R. K. (2014). Improvement of Process Performance and Calculation of 5S Activity in Organized Sector: A Case Study. i-manager's Journal on Mechanical Engineering, 4(3), 33-39. https://doi.org/10.26634/jme.4.3.2729

Abstract

The 5S method is a key component of the lean. The lean manufacturing process is a proven approach to more efficient workspaces adopted by leading manufacturers worldwide. The concept of lean is more value for less work. The objective of this work was to use 5S methodology to manage, and improve the working conditions of fastener production area in a fastener company. This directly results in improvement of process performance. To accomplish the goal, the authors focused on the implementation of 5S method as one of the lean tool. In order to develop a better organization of the workspace, and its utilization, the authors have focused on finding the weakest point of the system through which the overall efficiency of the system will be affected. A study was carried out in the case company to calculate its efficiency using 5S methodology, and to find out the weakest point on production area. Thus, the results after applying the proposed methodology estimates the production system efficiency as 75.64%.