Siddaganga Institute of Technology

Tumkūr, India

Siddaganga Institute of Technology

Tumkūr, India
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Adarsh S.H.,Siddaganga Institute of Technology | Sampath V.,Siddaganga Institute of Technology
Materials Science Forum | Year: 2017

Shape Memory Alloys (SMA) are used in diverse engineering and medical applications capitalizing on their sensing and actuation capabilities. This is attributed to the high magnitude of recovery strain and recovery stress that they are capable of generating. But shape memory alloys exhibit complex behaviour in the presence of electrical and magnetic fields as well as mechanical stress. Their behaviour in these domains is to be rightly and comprehensively understood if these are to be used in these applications. Over the years finite element analysis has proved to be a powerful tool for studying the behaviour of SMAs under different conditions and has therefore been applied in many important applications. In this paper an attempt has therefore been made to understand the behaviour of an equiatomic NiTi alloy wire under mechanical stress by finite element analysis using commercially available software MSC Marc. Simulation of an SMA wire with 0.5 mm diameter and 351 mm length was carried out in uniaxial tension by finite element analysis. The simulation involves three stages: geometric modelling using the software MSC.Patran. Finite element modelling also uses the same software, and finally arriving at the solution using the software MSC.Marc. The finte element model is created by meshing the geometric model using Element type Tetmesh4. Boundary conditions are then applied using MSC Mentat software followed by arriving at the solution using Auricchio model. The stress-strain behaviour of the equiatomic NiTinol wire under simple uniaxial tensile loading at different temperatures was simulated. © 2017 Trans Tech Publications, Switzerland.


Sreenivas Rao K.V.,Siddaganga Institute of Technology | Akhil N.,Siddaganga Institute of Technology
Materials Science Forum | Year: 2017

Unidirectional solidification is preferred to multidirectional solidification for growing crystals in a particular direction. An experimental set-up consisting of Bridgman type of upward directional solidification was employed for the present investigation. The main aim of the present investigation was to assess the effect of unidirectional upward solidification on the segregation of off-eutectic Pb-Sn alloys at different translational speeds of the experimental set-up. Solidification experiments were conducted on hypoeutectic and hypereutectic Lead-Tin alloys. Different combinations of growth rate V and composition Co. were used to investigate their effect on longitudinal macro segregation. Macro segregation along the length of the samples was observed in hypoeutectic Pb-Sn alloys whereas no such macro segregation was observed in hypereutectic alloys. The intensity of longitudinal macro segregation was found to increase with the increase in initial tin content of the alloy, increase in distance from the chill end and decrease in the solidification rate. © 2017 Trans Tech Publications, Switzerland.


Kadadevaramath R.S.,Siddaganga Institute of Technology | Chen J.C.H.,Gonzaga University | Latha Shankar B.,Siddaganga Institute of Technology
Expert Systems with Applications | Year: 2012

In today's globalization, the success of an industry is dependent on cost effective supply chain management under various markets, logistics and production uncertainties. Uncertainties in the supply chain usually decrease profit, i.e. increase total supply chain cost. Demand uncertainty and constraints posed by the every echelon are important factors to be considered in the supply chain design operations. Optimization is no longer a luxury but has become the order of the day. This paper specifically deals with the modeling and optimization of a three echelon supply chain network using the particle swarm optimization/intelligence algorithms. © 2012 Elsevier Ltd. All rights reserved.


Latha Shankar B.,Siddaganga Institute of Technology | Basavarajappa S.,Davangere University | Kadadevaramath R.S.,Siddaganga Institute of Technology | Chen J.C.H.,Gonzaga University
Expert Systems with Applications | Year: 2013

This paper considers simultaneous optimization of strategic design and distribution decisions for three-echelon supply chain architecture consisting of following three players; suppliers, production plants, and distribution centers (DCs). The key design decisions considered are: the number and location of plants in the system, the flow of raw materials from suppliers to plants, the quantity of products to be shipped from plants to distribution centers, so as to minimize the combined facility location, production, inventory, and shipment costs and maximize fill rate. To achieve this, three-echelon network model is mathematically represented and solved using swarm intelligence based Multi-objective Hybrid Particle Swarm Optimization algorithm (MOHPSO). This heuristic incorporates non-dominated sorting (NDS) procedure to achieve bi-objective optimization of two conflicting objectives. The applicability of proposed optimization algorithm was then tested by applying it to standard test problems found in literature. On achieving comparable results, the approach was applied to actual data of a pump manufacturing industry. The results show that the proposed solution approach performs efficiently. © 2013 Elsevier Ltd. All rights reserved.


Deepa H.R.,Bnm Institute Of Technology | Thipperudrappa J.,Bnm Institute Of Technology | Suresh Kumar H.M.,Siddaganga Institute of Technology
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2013

The absorption and fluorescence spectra of 6,7,8,9-tetrahydro-6,8,9- trimethyl-4-(trifluoro methyl)-2H-pyrano[2,3-b][1,8]naphthyridin-2-one (LD-489) and 1,2,3,8-tetrahydro-1,2,3,3,8-pentamethyl-5-(trifluoromethyl)-7H-pyrrolo[3,2- g]quinolin-7-one (LD-473) have been recorded at room temperature in different solvents and 1,4-dioxane-acetonitrile solvent mixtures. The UV-Visible absorption spectra are less sensitive to solvent polarity than the corresponding fluorescence spectra in both the dyes which show pronounced solvatochromic effect. The effects of solvents upon the spectral properties are analyzed using Lippert-Mataga polarity function, Richardts microscopic solvent polarity parameter and Catalán's multiple linear regression approach. Both general solute-solvent interactions and specific interactions are operative in these systems. The solvatochromic correlations are used to estimate excited state dipole moments using experimentally determined ground state dipole moments. The excited state dipole moment for both the dyes are found to be larger than their corresponding ground state dipole moment and is interpreted based on their resonance structures. © 2013 Elsevier B.V. All rights reserved.


Harish K.V.,Clemson University | Dattatreya J.K.,Siddaganga Institute of Technology | Neelamegam M.,Anna University
Construction and Building Materials | Year: 2013

In this study, conventional materials were used to prepare ultra-high strength mortars (UHSMs) and their stress-strain (σ-ε) characteristics in compression were investigated both experimentally and analytically. The effect of micro-fiber addition on the peak stress, peak strain, modulus of elasticity and energy absorption were then studied. Test results suggested that heat-treated UHSMs showed significantly higher strengths than non-heat-treated UHSMs. The micro-fiber addition significantly improved all the characteristics of UHSM. Both linear and non-linear correlations existed between the reinforcement indices of fibers and σ-ε characteristics of UHSM. The analytical modeling of the σ-ε curve showed good correlation with the experimental data. © 2013 Elsevier Ltd. All rights reserved.


Sumathi R.,Siddaganga Institute of Technology | Srinivas M.G.,CIT
Journal of Information Processing Systems | Year: 2012

With the increasing demand for real time applications in the Wireless Senor Network (WSN), real time critical events anticipate an efficient quality-of-service (QoS) based routing for data delivery from the network infrastructure. Designing such QoS based routing protocol to meet the reliability and delay guarantee of critical events while preserving the energy efficiency is a challenging task. Considerable research has been focused on developing robust energy efficient QoS based routing protocols. In this paper, we present the state of the research by summarizing the work on QoS based routing protocols that has already been published and by highlighting the QoS issues that are being addressed. The performance comparison of QoS based routing protocols such as SAR, MMSPEED, MCMP, MCBR, and EQSR has also been analyzed using ns-2 for various parameters. © 2012 KIPS.


This paper suggests an Intelligent Control Algorithm for optimizing the charge and discharge of a battery pack used in a hybrid/electric vehicle. With precision control of voltage and current levels in secondary batteries, high performance and greater battery life can be achieved and the problems of overcharging and over discharging in batteries can be avoided. It uses cell isolation system, which controls the number of cells required specifically for an instantaneous load condition, thus reducing the overall internal resistance of battery pack, hence reduces losses due to heating. © 2015 IEEE.


This paper suggests an Intelligent Control Algorithm for optimizing the charge and discharge of a battery pack used in a hybrid/electric vehicle. With precision control of voltage and current levels in secondary batteries, high performance and greater battery life can be achieved and the problems of overcharging and over discharging in batteries can be avoided. It uses cell isolation system, which controls the number of cells required specifically for an instantaneous load condition, thus reducing the overall internal resistance of battery pack, hence reduces losses due to heating. Copyright © 2016 SAE International.


Kavitha K.,Siddaganga Institute of Technology | Sudhamani M.V.,RNS Institute of Technology
Proceedings - 2014 5th International Conference on Signal and Image Processing, ICSIP 2014 | Year: 2014

Content based image retrieval (CBIR) is a promising way to address image retrieval based on the visual features of an image like color, texture and shape. Every visual feature will address a specific property of the image, so the state of the art focuses on combination of multiple visual features for content based image retrieval. In this paper we have devised a content based image retrieval system based on the combination of local and global features. The local features used are Bidirectional Empirical Mode Decomposition (BEMD) technique for edge detection and Harris corner detector to detect the corner points of an image. The global feature used is HSV colorfeature. For the experimental purpose the COIL-100 database has been used. The result show significant improvement in the retrieval accuracy when compared to the existing systems. © 2014 IEEE.

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