Sri Sairam Engineering College

Chennai, India

Sri Sairam Engineering College

Chennai, India

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Sathishkumar G.,Sri Sairam Engineering College | Sivakumar K.,Anna University
Journal of Magnetism and Magnetic Materials | Year: 2010

Nano particles of Mn(0.5-x)NixZn0.5 Fe2O4 (x=0.0, 0.1, 0.2, 0.3) have been synthesized by chemical co-precipitation method. The lattice constant and distribution of cation in the tetrahedral and octahedral sites have been deduced through X-ray diffraction (XRD) data analysis. The lattice constant (Å) for all Mn/Ni concentration is found to be less than that for the corresponding bulk values. X-ray intensity calculations indicate that there is deviation in the normal cation distribution. Magnetization decreases with increasing Ni concentration except for x=0.3, where it shows increasing trend. This is due to migration of Fe3+ ions from B-site to A-site, which reduces the B-B coupling and there by the spin canting in the B sublattice. The Curie temperature was found to decrease with increase in nickel concentration except for x=0.3, where it shows a rise. Coercivity is very low and is found to be inversely proportional to the grain size. © 2009 Elsevier B.V. All rights reserved.


Valarmathi T.N.,Sathyabama University | Palanikumar K.,Sri Sai Ram Institute of Technology | Latha B.,Sri Sairam Engineering College
Measurement: Journal of the International Measurement Confederation | Year: 2013

Particleboard is a wood based composite extensively used in wood working. Drilling is the most commonly used machining process in furniture industries. The surface characteristics and the damage free drilling are significantly influenced by the machining parameters. The thrust force developed during drilling play a major role in gaining the surface quality and minimizing the delamination tendency. The objective of this study is to measure and analyze the cutting conditions which influences the thrust force in drilling of particle board panels. The parameters considered are spindle speed, feed rate and point angle. The drilling experiments are performed based on Taguchi's design of experiments and a response surface methodology (RSM) based mathematical model is developed to predict the influence of cutting parameters on thrust force. The results showed that high spindle speed with low feed rate combination minimizes the thrust force in drilling of pre-laminated particle board (PB) panels. © 2012 Elsevier Ltd. All rights reserved.


Sathishkumar G.,Sri Sairam Engineering College | Sivakumar K.,Anna University
Journal of Magnetism and Magnetic Materials | Year: 2011

Nanoparticles of Mn0.5Zn0.5-xCdxFe 2O4 (x=0.0, 0.1, 0.2 and 0.3) have been synthesized by a chemical co-precipitation method. The lattice constant increases with increasing Cd content. X-ray calculations indicate that there is deviation in the cation distribution in the nanostructured spinel ferrite. The dielectric constant and dielectric loss decrease for the samples with Cd content up to x=0.2. However the dielectric constant rises for x=0.3. This is due to an increase in the hopping process at the octahedral (B sites). The dielectric constant increases with increase in temperature, indicating a thermally activated hopping process. The DC resistivity increases with Cd content up to x=0.2 and decreases for Cd content x=0.3. The maximum magnetization of all the samples decreases with increase in Cd content. © 2011 Elsevier B.V. All rights reserved.


Sathishkumar G.,Sri Sairam Engineering College | Sivakumar K.,Anna University
Journal of Alloys and Compounds | Year: 2010

Nano-particles of Mn0.5-xNixZn0.5Fe2 O4 (x = 0.0, 0.1, 0.2, 0.3 and 0.5) have been synthesized by chemical co-precipitation method. The lattice constant (Å) for all Mn/Ni concentration is found to be less than that for the corresponding bulk values. The X-ray intensity of the (4 4 0) plane increases with increasing Ni2+ concentration indicating the occupation of Ni2+ ions on octahedral sites. The dielectric constant decreases with the increase in Ni concentration except for x = 0.3. Relaxation peaks were observed for all the samples in tan δ versus frequency curves and the relaxation peaks shift towards lower frequency for higher nickel concentration. The resistivity was found to increase with increase in Ni concentration and decreases with increase in temperature. © 2010 Elsevier B.V. All rights reserved.


Vijaya Ramnath B.,Sri Sairam Engineering College | Junaid Kokan S.,Sri Sairam Engineering College | Niranjan Raja R.,Sri Sairam Engineering College | Sathyanarayanan R.,Sri Sairam Engineering College | And 3 more authors.
Materials and Design | Year: 2013

Natural fibre composites are a class of materials which are currently replacing the synthetic fibre composites for practical applications. This paper deals with the fabrication and investigation of hybrid natural fibre composites and compares it with other normal natural fibre composites like abaca and jute as reinforcements used separately. Mechanical characterization of the natural composite is obtained by testing the composite lamina for tensile, flexural, shear, and impact strength. The structure of the composite is such that, the jute fibre is present at the center flanked by abaca fibre on both sides. Glass fibre is used to laminate the composite on top and bottom, which improves the surface finish and adds strength. The natural fibres are arranged in horizontal and vertical directions to provide strength on all sides. The composite is manufactured by hand layup process and volume fraction of the fibres is up to 0.40. It is found that the abaca-jute hybrid composite has better properties than the abaca fibre alone in tensile and shear. However the abaca composite is superior to hybrid composite in flexural and impact strength. The internal structure of the composite is observed under scanning electron microscope (SEM) and the fractures, voids and fibre delamination are analyzed. © 2013 Elsevier Ltd.


Vijaya Ramnath B.,Sri Sairam Engineering College | Manickavasagam V.M.,Vels University | Elanchezhian C.,Sri Sairam Engineering College | Vinodh Krishna C.,Sri Sairam Engineering College | And 2 more authors.
Materials and Design | Year: 2014

Composites made with natural fibers are finding applications in a wide variety of engineering fields due to their low cost and eco-friendly nature. This paper deals with the fabrication and evaluation of hybrid natural fiber composite using jute and abaca fibers along with glass fibers. Each composite is made up of five layers with three layers of jute and abaca enclosed by two layers of glass fibers. The composites are manufactured with three different fiber orientations and the compositions are varied in three different proportions. The fabricated composite samples are tested to investigate their various mechanical properties. From the test results, it is observed that fiber orientation plays a vital role in determining the mechanical properties of the composite. Morphological analysis is done using Scanning Electron Microscope (SEM). © 2014 Elsevier Ltd.


Renganathan K.,Sri Sairam Engineering College | Bhaskar V.,SRM University
ISA Transactions | Year: 2011

In this paper, we propose an approach for achieving detection and identification of faults, and provide fault tolerant control for systems that are modeled using timed hybrid Petri nets. For this purpose, an observer based technique is adopted which is useful in detection of faults, such as sensor faults, actuator faults, signal conditioning faults, etc. The concepts of estimation, reachability and diagnosability have been considered for analyzing faulty behaviors, and based on the detected faults, different schemes are proposed for achieving fault tolerant control using optimization techniques. These concepts are applied to a typical three tank system and numerical results are obtained. © 2011 ISA. Published by Elsevier Ltd. All rights reserved.


Renganathan K.,Sri Sairam Engineering College | Bhaskar V.,SRM University
ISA Transactions | Year: 2010

This paper describes a technique for achieving on-line fault diagnosis in continuous systems that are modeled using Petri nets. The effect of place markings and transition markings are considered and based on the computed error between the initial marking and subsequent markings evolved in time, the faults are categorized assuming that the markings are both observable and unobservable. An algorithm has been suitably proposed for achieving detection of faults for a typical continuous three tank system along with suitable results. © 2010 ISA. Published by Elsevier Ltd. All rights reserved.


Rani T.P.,Sri Sairam Engineering College | Jaya Kumar C.,Rmk Engineering College
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST | Year: 2012

Wireless sensor networks (WSNs) consists of small nodes with constrained capabilities to sense, collect, and disseminate information in many types of applications. As sensor networks become wide-spread, security issues become a central concern. In this paper, we identify the Security requirements of key management in WSN. The secure management of the keys is one of the most critical elements when integrating cryptographic functions into a system. An outline of hybrid cryptography, one way hash and Key infection schemes are discussed in this paper. Along the way we analyze the advantages and disadvantages of current secure schemes. Finally, we aim to provide efficient key management operations for secure communications in WSN. © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2012.


Palanikumar K.,Sri Sairam Institute of Technology | Latha B.,Sri Sairam Engineering College | Senthilkumar V.S.,Anna University | Davim J.P.,University of Aveiro
Materials and Manufacturing Processes | Year: 2012

Glass fiber-reinforced polymer (GFRP) composite materials are an economic alternative to the engineering materials because of their superior properties. The present work focuses on the use of Grey relational analysis for optimizing the drilling parameters on the surface roughness and the thrust force in the drilling of GFRP composites. Taguchi's L 9, 3-level orthogonal array is used for the experimentation. Optimal machining parameters are determined by the Grey relational grade obtained from the Grey relational analysis for multiperformance characteristics. Experimental results show that the machining performance in the composite machining process can be improved at optimal drilling conditions. © 2012 Copyright Taylor and Francis Group, LLC.

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