Papers Posted on - Mar / 2015


Author Name V.Saikumar, V.Venkatesh, P.Sivaiah
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.05
Paper Title Multi-Objective Optimization in CNC Milling Process of Al-Cu-Zn Alloy Matrix Composite by Using Taguchi-Grey Relational Analysis Technique
Abstract
In present the improved demand of lightweight materials by high strength to weight ratio in the aerospace and automotive industries has managed to the development and custom of Al-alloy-based composites. In this paper an effort has been prepared the Al6082+Cu+Zn composite material and the optimization of CNC milling process parameters for two different work materials of compositions are Al6082 96%+Cu3%+Zn1%, Al6082 89%+Cu7%+Zn4% composite material. .The characteristics of these alloys have strength as well as weight ratio makes the extensive research on Al-Cu-Zn alloy MMC is carried out universally because of it is widely used in automotive & aerospace industries. Tribological behavior of aluminum alloy matrix is fabricated by using the stir casting process was investigated. The concept of grey system stands a innovative optimizing technique for accomplishment the estimate, grey relational analysis and resolution building in various regions. In this paper, usage of grey relational analysis aimed to optimizing the machining process parameters for the work piece is surface roughness and the metal removal rate is familiarized. In directive to increase the quality and productivity by using the optimization of CNC milling process parameters like speed, feed rate, depth of cut and different coated HSS tools to afford a good surface finish as well as high material removal rate. Therefore a multi objective optimization problem has been obtained which can be solved by the hybrid Taguchi method comprising of grey relational analysis.. Finally, Taguchi method has been used to solve the optimization problem.
Keywords
Stir casting process, Cnc milling, Taguchi method, Grey relational analysis
Author Name Priti Sonasale
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.04
Paper Title An Approach to Optimize Mig Welding Parameters by Using Design of Experiments
Abstract
The Metal arc Welding (MIG) process finds wide application because all commercially important applicable metals such as carbon steel, high-strength, low-alloy steel, and stainless steel, aluminum, copper, titanium, and nickel alloys can be welded in all positions with this process by choosing the appropriate shielding gas, electrode, and welding variables. In this work, the five control factors such as wire feed rate, arc voltage, welding speed, nozzle to plate distance and gas flow rate are considered. The welding parameters such as bead width, dilution and depth of HAZ have been considered. By using DOE method, the weld parameters were optimized. Analysis is done using ANOVA to determine the significance of parameters. Finally the confirmation test is carried out to compare the predicated values with the experimental values confirm its effectiveness in the analysis of bead width, dilution and depth of HAZ.
Keywords
MIG Welding, Mild steel, DOE, ANOVA
Author Name J. Sudeepan, K. Kumar, T. K. Barman, P. Sahoo
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.01
Paper Title Study of Mechanical and Tribological Properties of Abs/ZnO Polymer Composites
Abstract
The mechanical and tribological properties of acrylonitrile-butadiene-styrene (ABS) polymer filled with micron-sized zinc oxide (ZnO) are studied in this paper. The mechanical properties viz. tensile modulus, tensile strength, flexural modulus, flexural strength and micro-hardness are studied. For mechanical tests, ABS/ZnO composite materials are developed with 0, 5, 10, 15 and 20 wt% of filler. It is seen from the results that the tensile and flexural moduli increase with increase up to considered filler content, but the tensile strength and flexural strength increase up to 15 wt% and then start decreasing. The tribological behavior (friction coefficient and specific wear rate) of ABS composites filled with ZnO filler sliding against the steel counter face are investigated varying filler content (A), normal load (B) and sliding speed (C) with three levels of each parameter. The experiments are conducted on a multi-tribotester (block-on-roller configuration) using L27 orthogonal array (OA) of Taguchi analysis. To optimize the multiple responses (friction coefficient and specific wear rate), grey relational analysis is performed for the experimental results. It is seen from the analysis that the highest level of design parameters (A3B3C3) provides minimum friction coefficient and specific wear rate. The most influential factor which affects the tribological properties is normal load (B) followed by sliding speed (C) and filler content (A). Finally, a confirmation test is also carried out to validate the optimized results and it is seen that the grey relational grade is increased about 22% from initial to optimum conditions. The worn surfaces of ABS filled with micron-sized ZnO are also investigated by using scanning electron microscopy (SEM) images. It is seen that there are longitudinal grooves caused by micro-cutting effect and the wear mechanism is mainly abrasive in nature
Keywords
ABS; ZnO; Grey relational analysis; Friction; Wear rate.
Author Name Ashwani Kumar, Pravin P Patil
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.02
Paper Title FEA Based Dynamic Vibration Response Analysis of Loose Mounted Heavy Vehicle Transmission Gearbox Casing
Abstract
The main objective of this research work is to study the dynamic vibration characteristics of loose transmission gearbox casing. The loose vehicle transmission casing produces heavy vibration and noise. Noise and vibrations are the two technical indexes for the transmission failure. Truck transmission gearbox assembly is subjected to harmonic and meshing excitation. These excitation forces are the main reason of noise and vibration. The vehicle gearbox casing is mounted on chassis frame using connecting bolts fixture. 37 positional connecting bolts fixture were used to constraint the casing on chassis frame. This study is carried out in three stages. In first stage zero displacement constraint based boundary condition were used to evaluate the exact natural frequency and mode shapes. In second stage 4 fixture bolts were loosened, natural frequency and mode shapes were evaluated. In third stage all bolts of left positional view is unconstrained, natural frequency and mode shapes were evaluated. Reciprocity Principle was used to apply the loads on casing. The first 10 vibration mode shapes and natural frequencies were calculated using ANSYS 14.5. The study has practical importance for the structure optimization of gearbox casing. ANSYS 14.5 is used as FEA based analysis tool. The natural frequency for zero displacement condition varies from 1669 Hz to 2865 Hz. The simulation results were verified with experimental result available in literature.
Keywords
FEA; Connecting Bolts; Zero Displacement; Dynamic Response; Unconstraint; Transmission Casing; Truck
Author Name Mithun V Kulkarni, K Elangovan, K HemachandraReddy, Mohan Poojari, Harsha S
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.03
Paper Title Tribological Behaviours of CaSiO3 Reinforced PA6 Polymer–Metal Sliding Combinations under Dry Friction Conditions
Abstract
The friction and wear properties of polyamide 6 (PA6) and CaSiO3 (Calcium meta silicate) reinforced PA6 composites sliding against metal under dry sliding conditions are studied as per ASTM G99 standard by using a pin-on-disc wear testing apparatus. The result of the applied load and rubbing speed on the wear behaviour of the polymer–metal sliding combinations under dry / normal sliding conditions are investigated. The worn surfaces are examined by using Scanning Electron Microscope (SEM). Experimental results show that CaSiO3 samples under dry conditions show enhanced wear resistance. It is noticed that frictional heat has the capacity to change the physical state of the polyamide sliding surfaces and hence contributes for a major change on the wear behaviour of polymer-metal sliding under dry / normal sliding conditions.
Keywords
Wear, Tribology, PA6, CaSiO3
Author Name N.K Mandal, Tanmoy Roy
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.06
Paper Title Prediction of Chatter Vibration and Stability Mapping In Cylindrical Turning of AISI 1045 Steel
Abstract
Prediction of chatter vibration of a machining process is important as it ultimately affect the quality of the product. Proper combination of cutting parameters like spindle speed, feed, depth of cut etc. should give optimal productivity as well as optimal quality of the product. In addition, high rotational speed of spindle motor and feed motor creates undesirable chatter vibrations which ultimately damage the machineries also. Such undesirable vibrations can spoil the cutting surface with chatter marks and ultimately makes the machining system unstable. In the present study, experiments were conducted on All Gear Lathe Machine for 30 no. of cylindrical shafts of 32 mm in diameter and 70cm long steel AISI1045 in wet machining condition to find out the ranges of cutting parameters for which the machining system should be in dynamically stable condition.
Keywords
Stability limit, Chatter, Regenerative, Turning tool, Vibration
Author Name Manoj Kumar Rath
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.07
Paper Title Free Vibration of Woven Fiber Composite Angular Plates in Adverse Hygrothermal Environment
Abstract
The present study deals with numerical investigation on vibration and buckling behavior of laminated composite angular plates subjected to varying temperature and moisture concentration. Quantitative results are presented to show the effects of geometry, material and lamination parameters of woven fiber laminate on vibration and buckling of composite plates for different temperature and moisture concentrations.
Keywords
Hygrothermal, Composites, Free vibration, Woven fiber, Buckling Loads.
Author Name A.Shirisha , B.Sri Ramji
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DOI http://dx.doi.org/10.11127/ijammc.2015.03.08
Paper Title Mechanical Properties of Hybrid Composite Polyester Matrix Reinforced Glass Fibres
Abstract
The mechanical properties of hybrid composite material i.e. polyester matrix composites (ECMAS 411) reinforced with BS3496 E-glass fibres i.e. woven roving, chopped strand mat (CSM) fibers were evaluated. There are indications that the incorporation of both glass fibers into a single matrix which is polyester resin will stabilize mechanical properties and lowering manufacturing costs. In this research the impact strength, tensile strength, flexural strength,
Keywords
Woven roving (WR), CSM, Mechanical properties Yttria-Stabilized Zirconia (YSZ).