Papers Posted on - Apr / 2017


Author Name E.Madhusudan Raju
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DOI http://dx.doi.org/10.11127/ijammc2017.04.01
Paper Title Dynamic Analysis of 2R Manipulator With Joint Clearance
Abstract
Generally Kinematic and Dynamic analysis of robots are performed without Joint clearance, because of which the results obtained are not accurate. For better analysis and control, the correct estimation and inclusion of joint effects is imminent. This project attempts to determine the effect of joint clearance on R-R type two link planar manipulator when the end effector moves in predetermined path (straight line). Joint and link are assumed to be rigid. Manipulator is modeled by using MSC Adams and joint clearance is incorporated to evaluate the contact forces by different methods. The joint clearances are varied from 0.01mm to 0.1mm and corresponding dynamic behavior is studied. Input to the model is taken so as to replicate human arm. The contact force during the contact process of revolute joint with clearance is one of the important contents of mechanical system. At the contact points normal and tangential forces, can be evaluated using different contact methods. Contact forces are plotted against time for different methods for various clearances. The obtained results are tabulated and compared to provide information on the clearan0ce. Moreover I think this work will help the industry in correctly assessing the joint torques required for manipulating links with joint clearance.
Keywords
Joint clearance; Msc Adams ; Contact force model
Author Name Gangadhar M Kanaginahal
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DOI http://dx.doi.org/10.11127/ijammc2017.04.02
Paper Title Microstructural Study and Evaluation of Few Mechanical Properties of Hybrid Composites
Abstract
Limitations of monolithic composite can be addressed by hybrid composites which are gaining importance in field of composites. An attempt has been made in making of hybrid composite comprising of bi-directional plain weaved Kevlar, S-glass and E-glass fibers reinforcements and epoxy matrix by vacuum bagging and hand layup methods. Few tests such as Hardness, Impact strength and Inter-laminar shear strength tests are conducted as per ASTM standards. Characterization of composites was carried out using SEM to analyze the material bonding, defects and failure behavior under load conditions. S-glass composite outperformed other composites performing better in all the test conditions but when combined with Kevlar the reduction in property is minimal and even microstructural study showed bonding of S-glass and Kevlar hybrids compared to S-glass is acceptable
Keywords
Hybrid Composite, S-glass, Kevlar, E-glass, Mechanical Testing, SEM Characterization, Analysis
Author Name Shaik Ashfack
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DOI http://dx.doi.org/10.11127/ijammc2017.04.03
Paper Title Experimental Investigation & Optimization of Mini ECM Processes Parameters for AISI 304L Steel by using RSM
Abstract
In this research paper Mini Electro chemical Machining works successfully with the travelling wire procedure. Electrochemical machining (ECM) is a technique for evacuating metal particles by an electrochemical procedure rather than standard machining methods. It gives another point of view to machining process and being an imitator of new advancements (MECM), Execution in electrochemical machining (ECM) is fundamentally administered by flow attributes of electrolyte. Electrochemical machining is one of the generally utilized non-traditional machining procedures to machine complicated shapes for electrically leading yet hard to-machine materials, for example, super compounds, Ti-alloys, alloy steel, tool steel, stainless steel, and so forth. The aim of this paper is to Investigate the effect of various Mini Electro chemical Machining processes parameters on the quality of work material. The quality of cutting is observed by means of overcut. The Machining parameters such as Voltage, Electrolyte concentration & Flow rate are optimized by using Response Surface Methodology.
Keywords
RSM; MECM;Overcut;Electrolyte Concentration
Author Name Rohollah Solhdost
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DOI http://dx.doi.org/10.11127/ijammc2017.04.04
Paper Title Determining Impact of Groove Depth on the Repairing of Groove on the Surface of General Structural Steel by Using Taguchi Method
Abstract
If pipelines are damaged or fail to function normally, downstream units will stop operation, daily activities will be disrupted, or the process will shut down. Awareness of and knowing about the condition of pipelines in service as well as recognizing the cause of failure and then taking timely measures to make appropriate changes can increase productivity. One of the appropriate measures is to repair the surface crack of steel pipelines using different welding methods. Two variables of crack width and crack depth are common in all the repair methods. In this research, the first variable is the crack depth and other variables are considered the second variables. Thus, the effect of crack depth on the repairing of steel surface crack is determined using Oxyacetylene Flame Welding with Spray of Pure Iron Powder. The test results are analyzed and then compared using the Taguchi test design method with one factor at one level (one-factor ANOVA). Investigating and analysis of the results showed that the contribution of crack depth variable in Oxyacetylene Flame Welding with Spray of Pure Iron Powder is 34.2%, 14.6% and 91.5% to achieving the yield strength, tensile strength and elongation of base metal, respectively. Thus, to achieve strength (tensile or yield) in the base metal, studying the effect of crack depth is not enough by itself; however, to achieve relative elongation of the base metal, the most effective variable is crack depth (91.5% contribution).
Keywords
Flame Welding, One level, One variable, Oxyacetylene
Author Name Ritam Chatterjee
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DOI http://dx.doi.org/10.11127/ijammc2017.04.05
Paper Title Manufacturing of Metallic Glasses
Abstract
The present work reviews the different techniques that are currently being used in synthesis of metallic glasses viz. solid state, liquid state and vapor state processes. The advantages and disadvantages of each technique is discussed in detail and the various processes are compared to each other to determine the most economically and technologically feasible technique to be used according to desired product characteristics. Finally a section of the paper is devoted to a discussion of the manufacturing techniques being used for producing bulk metallic glassesMetallic glasses are a novel class of materials having extraordinary strength,toughness and elasticity.
Keywords
Bulk Metallic glasses; Synthesis; Manufacturing
Author Name V Sundara Siva Kumar
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DOI http://dx.doi.org/10.11127/ijammc2017.04.06
Paper Title Rain Detection With Automatic Close Of Window
Abstract
Portable electronic devices are integral components in our daily life. Every day new products are introduced to the market that utilizes embedded computers in novel ways. In recent years, hardware such as microprocessors, microcontrollers, and FPGA chips have become much cheaper. Embedded systems are often required to provide Real-Time response. The main elements that make embedded systems unique are its reliability and ease in debugging. Some of the main devices used in embedded products are Microprocessors and Microcontrollers. Microprocessors are commonly referred to as general purpose processors as they simply accept the inputs, process it and give the output. In contrast, a microcontroller not only accepts the data as inputs but also manipulates it, interfaces the data with various devices, controls the data and thus finally gives the result. The project Rain detection with automatic closing of window using AT89S52 Microcontroller is an exclusive project that can control the servo motor according to the instructions given by the above said microcontroller based on rain moisture sensor.
Keywords
Real time embedded system, Micro Controller, Transformer, Regulated Power Supply.
Author Name Alok Kumar
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DOI http://dx.doi.org/10.11127/ijammc2017.04.07
Paper Title Fatigue analysis of welded joints
Abstract
Welded joint is commonly used joint for industrial application and its failure under fluctuating load (fatigue) has been the concern in recent past. Fatigue analysis of the welded joints requires a precise knowledge of the stress distribution in the critical regions of the weld. There are various approaches presented by IIW to determine the stress distribution in weld region. In present work the nonlinear peak stress which is developed at the weld region is linearized to get actual linearized stress distribution in the weld region. The proposed method enables us to determine linearized peak stress at the weld toe using shell modeling. A methodology is developed to estimate Crack initiation life of welded joints. Neuber’s rule is used to calculate the local stress and local strain by using elastic stresses obtained from FEA. Strain life equation is used to estimate the crack initiation life using the local stress and strains.
Keywords
Fatigue stress distribution,Weldedv joints,Life estimation,Finite element Analsis