Karnataka, India
Karnataka, India

Davangere University is a public state university located in Davangere, Karnataka, India. The university was established in the year 2008 by the Government of Karnataka. Wikipedia.

SEARCH FILTERS
Time filter
Source Type

Pooja C.V.,Sri Taralabalu Jagadguru Institute Of Technology | Sreenivasa C.G.,Davangere University
International Journal of Services and Operations Management | Year: 2017

In globalised market environment, it is inevitable for the manufacturing sectors to face competition. In order to face this competition, the manufacturing sectors need to imbibe agile manufacturing (AM) paradigm. However, these manufacturing sectors may be practicing AM paradigm at slower/higher pace. In order to identify the pace at which AM paradigm is practiced, agility level of these companies has to be assessed. In this background, the scope of this paper is to carryout agility assessment using fuzzy logic approach. This is due to the reason that, fuzzy logic uses linguistic variables for assessment. The agility assessment covers thirty criteria reported by the previous researchers in the literature. The case study has been carried out in a battery manufacturing company. Initially agility index from this company was gathered and analysed. Subsequently, weak criteria prevailing in the case company has been identified. Further, proposals were derived to strengthen these weak AM criteria. Overall, the process of applying fuzzy logic for agility assessment has been explained with a case study in this paper. Copyright © 2017 Inderscience Enterprises Ltd.


Suresh R.,Canara Engineering College | Basavarajappa S.,Davangere University | Samuel G.L.,Indian Institute of Technology Madras
International Journal of Refractory Metals and Hard Materials | Year: 2012

The hard turning process with advanced cutting tool materials has several advantages over grinding such as short cycle time, process flexibility, compatible surface roughness, higher material removal rate and less environment problems without the use of cutting fluid. However, the main concerns of hard turning are the cost of expensive tool materials and the effect of the process on machinability characteristics. The poor selection of the process parameters may cause excessive tool wear and increased work surface roughness. Hence, there is a need to study the machinability aspects in high-hardened components. In this work, an attempt has been made to analyze the influence of cutting speed, feed rate, depth of cut and machining time on machinability characteristics such as machining force, surface roughness and tool wear using response surface methodology (RSM) based second order mathematical models during turning of AISI 4340 high strength low alloy steel using coated carbide inserts. The experiments were planned as per full factorial design (FFD). From the parametric analysis, it is revealed that, the combination of low feed rate, low depth of cut and low machining time with high cutting speed is beneficial for minimizing the machining force and surface roughness. On the other hand, the interaction plots suggest that employing lower cutting speed with lower feed rate can reduce tool wear. Chip morphology study indicates the formation of various types of chips operating under several cutting conditions. © 2012 Elsevier Ltd.


Sogalad I.,Davangere University
Materials and Design | Year: 2010

The objective of this paper is to study the influence of cryogenic treatment of pin on load bearing ability of interference fitted assemblies. En8 steel was used to prepare the pin and bush. The pins were soaked in liquid nitrogen (cryogenic temperature) and ice for different time periods. The bushes were heated and then assembled without applying the external pressure. The assemblies were tested for their strength. A comparative study on results of experimental and Lame's approach has been carried out. The results reveal that assemblies with cryogenically treated pin exhibits higher load bearing ability. The degree of increase in load bearing ability with increase in soaking time at cryogenic temperature is small. The variation in load bearing ability obtained through experimental investigation is in agreement with that of Lame's approach. © 2009 Elsevier Ltd. All rights reserved.


Kiran T.S.,Kalpataru Institute of Technology | Prasanna Kumar M.,Visvesvaraya Technological University | Basavarajappa S.,Davangere University | Viswanatha B.M.,Kalpataru Institute of Technology
Materials and Design | Year: 2014

Dry sliding wear behavior of zinc based alloy and composite reinforced with SiCp (9. wt%) and Gr (3. wt%) fabricated by stir casting method was investigated. Heat treatment (HT) and aging of the specimen were carried out, followed by water quenching. Wear behavior was evaluated using pin on disc apparatus. Taguchi technique was used to estimate the parameters affecting the wear significantly. The effect of HT was that it reduced the microcracks, residual stresses and improved the distribution of microconstituents. The influence of various parameters like applied load, sliding speed and sliding distance on wear behavior was investigated by means and analysis of variance (ANOVA). Further, correlation between the parameters was determined by multiple linear regression equation for each response. It was observed that the applied load significantly influenced the wear volume loss (WVL), followed by sliding speed implying that increase in either applied load or sliding speed increases the WVL. Whereas for composites, sliding distance showed a negative influence on wear indicating that increase in sliding distance reduces WVL due to the presence of reinforcements. The wear mechanism of the worn out specimen was analyzed using scanning electron microscopy. The analysis shows that the formation and retention of ceramic mixed mechanical layer (CMML) plays a major role in the dry sliding wear resistance. © 2014 Elsevier Ltd.


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.


Suresh R.,Canara Engineering College | Basavarajappa S.,Davangere University | Samuel G.L.,Indian Institute of Technology Madras
Measurement: Journal of the International Measurement Confederation | Year: 2012

Hard turning with multilayer coated carbide tool has several benefits over grinding process such as, reduction of processing costs, increased productivities and improved material properties. The objective was to establish a correlation between cutting parameters such as cutting speed, feed rate and depth of cut with machining force, power, specific cutting force, tool wear and surface roughness on work piece. In the present study, performance of multilayer hard coatings (TiC/TiCN/Al 2O 3) on cemented carbide substrate using chemical vapor deposition (CVD) for machining of hardened AISI 4340 steel was evaluated. An attempt has been made to analyze the effects of process parameters on machinability aspects using Taguchi technique. Response surface plots are generated for the study of interaction effects of cutting conditions on machinability factors. The correlations were established by multiple linear regression models. The linear regression models were validated using confirmation tests. The analysis of the result revealed that, the optimal combination of low feed rate and low depth of cut with high cutting speed is beneficial for reducing machining force. Higher values of feed rates are necessary to minimize the specific cutting force. The machining power and cutting tool wear increases almost linearly with increase in cutting speed and feed rate. The combination of low feed rate and high cutting speed is necessary for minimizing the surface roughness. Abrasion was the principle wear mechanism observed at all the cutting conditions. © 2012 Published by Elsevier Ltd. All rights reserved.


Arun Kumar M.B.,Government Engineering College | Swamy R.P.,Davangere University
ARPN Journal of Engineering and Applied Sciences | Year: 2011

Flyash-eglass-Al6061 alloy composites having 2 wt%, 4 wt%, 6wt% and 8wt% of flyash and 2 wt% and 6wt % of e-glass fiber were fabricated by liquid metallurgy (stir cast) method. The casted composite specimens were machined as per test standards. The specimens were tested to know the common casting defects using ultra-sonic flaw detector testing system. Some of the mechanical properties have been evaluated and compared with Al6061 alloy. Significant improvement in tensile properties, compressive strength and hardness are noticeable as the wt % of the flyash increases. The microstructures of the composites were studied to know the dispersion of the flyash and e-glass fiber in matrix. It has been observed that addition of flyash significantly improves ultimate tensile strength along with compressive strength and hardness properties as compared with that of unreinforced matrix. © 2006-2011 Asian Research Publishing Network (ARPN).


Basavarajappa S.,Davangere University | Ellangovan S.,Davangere University
Wear | Year: 2012

The dry sliding wear characteristics of a glass-epoxy (G-E) composite, filled with both silicon carbide (SiC p) and graphite (Gr), were studied using a pin-on-disc test apparatus. The specific wear rate was determined as a function of sliding velocity, applied load and sliding distance. The laminates were fabricated by the hand lay-up technique. The volume percentage of filler materials in the composite was varied, silicon carbide was varied from 5 to 10% whereas graphite was kept constant at 5%. The excellent wear resistance was obtained with glass-epoxy containing fillers. The transfer film formed on the counter surface was confirmed to be effective in improving the wear characteristics of filled G-E composites. The influence of applied load is more on specific wear rate compared to the other two wear parameters. The worn surfaces of composites were examined with scanning electron microscopy (SEM) to investigate the probable wear mechanisms. It was found that in the early stage of wear, the fillers contribution is significant. The process of transfer film, debris formation and fiber breakage accounts for the wear at much later stages. © 2012 Elsevier B.V.


Arun K.V.,Davangere University | Basavarajappa S.,Davangere University | Sherigara B.S.,Kuvempu University
Materials and Design | Year: 2010

The results of the experimental analysis carried out on the glass/textile fabric reinforced hybrid composites under normal condition and sea water environments have been reported. The critical stress intensity factor, interlaminar shear strength and impact toughness have been evaluated, both in interlaminar and translaminar directions. The specimen preparation and the experimentations were carried out according to the ASTM standards. Results have revealed that the damage in hybrid composite under sea water environment is entirely different. The characterising parameters have shown changes in their magnitudes with the variation in immersion time. The nature of fracture as a function of the reinforcement volume, loading and environmental conditions has been analyzed with the aid of scanning electron microscopy. The SEM analysis has shown that the fibers pull out, matrix cracking and also the nature of crack growth is different in sea water environment. The fracture in individual fiber has also been identified. © 2009 Elsevier Ltd. All rights reserved.


Manjaiah M.,National Institute of Technology Karnataka | Narendranath S.,National Institute of Technology Karnataka | Basavarajappa S.,Davangere University
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2014

Shape memory alloys (SMAs) are the developing advanced materials due to their versatile specific properties such as pseudoelasticity, shape memory effect (SME), biocompatibility, high specific strength, high corrosion resistance, high wear resistance and high anti-fatigue property. Therefore, the SMAs are used in many applications such as aerospace, medical and automobile. However, the conventional machining of SMAs causes serious tool wear, time consuming and less dimensional deformity due to severe strain hardening and pseudoelasticity. These materials can be machined using non-conventional methods such as laser machining, water jet machining (WJM) and electrochemical machining (ECM), but these processes are limited to complexity and mechanical properties of the component. Electrical discharge machining (EDM) and wire EDM (WEDM) show high capability to machine SMAs of complex shapes with precise dimensions. The aim of this work is to present the consolidated references on the machining of SMAs using EDM and WEDM and subsequently identify the research gaps. In support to these research gaps, this work has also evolved the future research directions. © 2014 The Nonferrous Metals Society of China.

Loading Davangere University collaborators
Loading Davangere University collaborators