Journal of
Mechanical Engineering Research

  • Abbreviation: J. Mech. Eng. Res.
  • Language: English
  • ISSN: 2141-2383
  • DOI: 10.5897/JMER
  • Start Year: 2009
  • Published Articles: 118

JMER Articles

Behavior of a radio channel in the WLL (Wireless Local Loop)

December 2010

  The local loop can be of two kinds, the local loop with copper wires and the local loop that use radio technology. Under certain conditions, the wireless Local Loop (WLL) can be an alternative more interesting than the copper local loop. We study in this paper the behavior of a radio channel and the multipath effect in a WLL transmission.   Key words: Wireless Local Loop (WLL), radio...

Author(s):   S. Boualleg and B. Haraoubia      

Non-axisymmetric dynamic response of imperfectly bonded buried fluid-filled orthotropic thin cylindrical shell due to incident compressional wave

December 2010

  The main aim of this paper is to assess and compare the relative importance of the effects of considering the fluid presence and the bond imperfection while evaluating the non-axisymmetric dynamic response of an imperfectly bonded empty as well as fluid filled orthotropic thin cylindrical shell buried under soil and excited by compressional wave (P-wave). While applying thin shell theory, the effect of shear...

Author(s):   Rakesh Singh Rajput, Sunil Kumar, Alok Chaube and J. P. Dwivedi      

The need for the incorporation of boundary condition prediction in real life layups using Drape simulation software tool

December 2010

  The focus on the contour sensitive part mating boundary conditions development, using software in the fabric deformation during the hand layup and automation of press-forming process is important in the development of composite materials. During the real life layup production processes, the fabric directional changes produced wrinkles and voids in the part produced. This directional changes are not really...

Author(s):   T. A. Adegbola, I. Aghachi and R. Sadiku       

Prediction of stress concentration effect under thermal and dynamic loads in a high pressure turbine rotor

November 2010

  Geometric discontinuities cause a large variation of stress and produce a significant increase in stress. The high stress due to the variation of geometry is called as ‘stress concentration’. This will increase when the loads are further applied. There are many investigators who studied the stress distribution around the notches, grooves, and other irregularities of various machine...

Author(s):   R. Nagendra Babu, K. V. Ramana and K. Mallikarjuna Rao        

Vehicle gearbox fault diagnosis using noise measurements

November 2010

  Noise measurement is one of the technologies for health monitoring and diagnosis of rotating machines such as gearboxes. Although, significant research has been undertaken in understanding the potential of noise measurement in monitoring gearboxes, this has been solely applied on any types of gears (spur, helical, etc.). The condition monitoring of a lab-scale, single stage, gearbox, represents the real...

Author(s):   Sameh M. Metwalley, Nabil Hammad and Shawki A. Abouel-seoud      

Hot deformation behavior of Nb-V microalloyed steel

October 2010

      n this research, hot deformation behavior of Nb-V microalloyed steel has been investigated by conducting hot compression tests at temperatures of 900-1100°C and under constant strain rates, ranging from 0.01 to 1s-1. The stress-strain curves showed that dynamic recrystallization is responsible for flow softening at steady temperatures and strain rates. The relations between peak...

Author(s):   G. R. Ebrahimi, H. Arabshahi and M. Javdani      

Investigation to improve hunting stability of railway carriage using semi-active longitudinal primary stiffness suspension

October 2010

  Railway carriage model moving on tangent tracks is constructed by deriving the associated equations of motion where single-point and two-point wheel-rail contact is considered. The railway carriage is modeled by 31 degrees of freedom which govern vertical displacement, lateral displacement, roll angle and yaw angle of wheelset whereas vertical displacement, lateral displacement, roll angle, pitch angle and...

Author(s):   Karim H. Ali Abood and Rasheed Ahmad Khan      

Effect of relaxation times and rotation on the propagation of plane waves in generalized magneto-thermo-viscoelasticity

October 2010

  The problem of wave propagation in the generalized dynamical theory of thermo-elasticity proposed by Green and Lindsay is applied to study the propagation of harmonically time dependent thermo-visco-elastic plane waves of assigned frequency in an infinite visco-elastic solid in a magnetic field. A more general dispersion equation is deduced to determine the effects of rotation, viscoelasticity and relaxation...

Author(s):   Arup Baksi, Bidyut Kumar Roy, Sanjoy Sen and Rasajit Kumar Bera      

A new experimental technique to determine heat transfer coefficient and pressure drop in smooth and micro-fin tube

September 2010

  An experimental test facility is designed and built to calculate condensation heat transfer coefficients and pressure drops for HFC-134a in a 10.21 mm ID smooth and 8.56 mm ID micro-fin tube. The main objective of the experimentation is to investigate the enhancement in condensation heat transfer coefficient and increase in pressure drop using micro-fin tube for different condensing temperatures and further...

Author(s):   S. N. Sapali and Pradeep A. Patil      

Calibrating the multiple orifice mathematical model using physical scale model foam at low Reynolds number

September 2010

  Recently, gelcast ceramic foams are being considered as potential diesel particulate filter substrates. Consequently, a mathematical model known as the Multiple Orifice Mathematical (MOM) model for the study of fluid flow and the determination of pressure gradients across the foam filters was developed and calibrated by some researchers. However, there was need to establish the model application on a wider...

Author(s):   M. Emmanuel Adigio    

Reliability prediction of control valves through mechanistic models

August 2010

  A Nuclear Power Plant (NPP) consists of normally operating and emergency standby systems and components. The failure of any operating component will lead to a change in the state of the plant. Control of the processes in the plant is an essential part of the plant operation. The most common control element in the process control systems is the control valve. The control valve manipulates a...

Author(s):   M. Hari Prasad, G. Rami Reddy, A. Srividya and A. K. Verma      

The design and development of G-code checker and cutting simulator for CNC turning operation

August 2010

  CNC machines have been becoming popular in manufacturing sector for the last fourdecades. It still costs a lot of money to afford some aspects related to the operations of these machines, such as  the hardware, the software and the brainware. One important aspect is the programming stage where this activity requires a skillful programmer and an appropriate programming media. To...

Author(s):   Bagus Arthaya, Ari Setiawan and Santoso Sunardi    

Integrated neural networks approach in CAD/CAM environment for automated machine tools selection

March 2010

  This paper proposed a new model for integrating neural networks approach in the task of generating process planning for machining features. The main issue of process planning addressed in this paper is the optimization of machine tools selection for mechanical part containing simple and interacting features. First, this proposed method elaborated a knowledge database from the investigation with expert in...

Author(s):   Romdhane BenKhalifa, Noureddine Ben Yahia and Ali Zghal    

Geometrically nonlinear transient analysis of functionally graded shell panels using a higher-order finite element formulation

March 2010

  Nonlinear transient analysis of functionally graded curved panels is carried out employing a higher-order C0 finite element formulation. The element consists of nine degrees-of-freedom per node with higher-order terms in the Taylor’s series expansion which represents the higher-order transverse cross sectional deformation modes. The formulation includes Sanders’ approximation for doubly...

Author(s):   S. Pradyumna, Namita Nanda and J. N. Bandyopadhyay      

Fractography of compression failed carbon fiber reinforced plastic composite laminates

February 2010

Widespread usage of composites in the advanced technologies, has led to the study of the failure modes by which these composites fail, as identification and hence the interpretation of these characteristic fracture features is necessary to provide valuable information in understanding of the failure behavior of composites. Hence, in this paper, our effort has been in the study of the fractographic features in the carbon...

Author(s):   M. S. Vinod, , Sunil B. J, Vinay Nayaka, Raghavendra Shenoy, M. S. Murali and A. Nafidi        

Wind data analysis of Silchar (Assam, India) by Rayleigh’s and Weibull methods

February 2010

  In this study, wind energy potential of Silchar, the Southern part of Assam, India was analyzed for the period of five years from 2003 - 2007. The wind velocity was recorded diurnally, which was averaged over 24 h in a day. The sampling was done after every 3 h. Diurnal wind speed variation shows the actual picture of wind regime of a place. The average wind velocity in Silchar is about 3.11 kmph, which is...

Author(s):   Rajat Gupta and Agnimitra Biswas          

Functional parameters modelling of transformer

November 2009

  This paper analyses transformer loss of life, attending to the realistic variability of both structural and functional parameters. The article begins with the modelling of load and ambient temperature profiles by means of chronological series theory. A simple additive model is proposed and validated with realistic data. Loss of life resulting from probabilistic functional and structural parameters is analysed...

Author(s):   Marius-Constantin Popescu and Cristinel Popescu    

Study of roller burnishing process on En-8 specimens using design of experiments

September 2009

  Roller burnishing process is a superior cold forming finishing process. It is done on machine or ground surfaces for both external and internal surfaces. In this process, a smooth, hard object (under considerable pressure) rubs over the minute surface irregularities that are produced during machining or shearing. The hardened rolls of the tool press against the surface and deform the protrusions to a more...

Author(s):   C. S. Jawalkar and R. S. Walia        

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