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Optimizing the Machining Parameters for Minimum Surface Roughness in Turning of GFRP Composites Using Design of Experiments

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Journal of Materials Science & Technology 2004年第4期20卷 373-378页

作者： k.palanikumar L.karunamoorthy R.karthikeyan Department of Mechanical & Production Engineering Sathyabama Institute of Science & Technology Deemed University Chennai-119 IndiaDepartment of Mechanical Engineering College of Engineering Anna University Chennai-25 IndiaDepartment of Manufacturing Engineering Annamalai University Chidambaram-608 001 India

In recent years, glass fiber reinforced plastics (GFRP) are being extensively used in variety of engineering applications in many different fields such as aerospace, oil, gas and process industries. However, the users of FRP are facing difficulties to machine it, because of fiber delamination, fiber pull out, short tool life, matrix debonding, burning and formation of powder like chips. The present investigation focuses on the optimization of machining parameters for surface roughness of glass fiber reinforced plastics (GFRP) using design of experiments (DoE). The machining parameters considered were speed, feed, depth of cut and workpiece (fiber orientation). An attempt was made to analyse the influence of factors and their interactions during machining. The results of the present study gives the optimal combination of machining parameters and this will help to improve the machining requirements of GFRP composites.

关键词： Optimization Turning GFRP composites Surface roughness

Analysis of Surface Integrity in Drilling Metal Matrix and Hybrid Metal Matrix Composites

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Journal of Materials Science & Technology 2012年第8期28卷 761-768页

作者： T.Rajmohan k.palanikumar J.Paulo Davim Department of Mechanical Engineering Sri Chandrasekharendra Saraswathi Viswa Maha Vidyalaya University Department of Mechanical Engineering Sri Sai Ram Institute of Technology Department of Mechanical Engineering University of AveiroCampus Santiago3810-193 AveiroPortugal

Hybrid metal matrix composites consist of at least three constituents-a metal or an alloy matrix and two reinforcements in various forms, bonded together at the atomic level in the composite. Despite their higher specific properties of strength and stiffness, the non homogeneous and anisotropic nature combined with the abrasive reinforcements render their machining difficult. In this paper, the surface integrity of machining in drilling hybrid composites has been discussed. Drilling tests are carried out at different spindle speed, feed rates, and different drill tool materials to investigate the effect of the various cutting parameters on the surface quality and the extent of the deformation of drilled surface due to drilling. Materials used for the present investigation are A1356/IOSIC （wt%） metal matrix and A1356/10SiC-3mica （wt%） hybrid composites. The composites are fabricated using stir casting route. The drilling tests are conducted on vertical computer numeric control （CNC） machining center using carbide, coated carbide and polycrystalline diamond （PCD） drills. The surface roughness decreases with increasing spindle speed and increases with increasing feed rate. The machined surface is analyzed by scanning electron microscopy （SEM）. SEM images of the machined surfaces indicate the presence of grooves and pits. Microhardness depth profiles indicate that the subsurface damage is limited to the top of 100-250 μm.

关键词： Hybrid composites Scanning electron microscopy (SEM) Subsurface Drilling

Influence of carbon nano tubes on mechanical, metallurgical and tribological behavior of magnesium nanocomposites

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Journal of Magnesium and Alloys 2017年第3期5卷 326-335页

作者： S.T.Selvamani S.Premkumar M.Vigneshwar P.Hariprasath k.palanikumar Department of Mechanical Engineering Vel Tech Multi Tech Engineering CollegeChennai 600062TamilnaduIndia Department of Mechanical Engineering Vel Tech Dr.RR Dr.SR UniversityChennai 600062TamilnaduIndia Department of Manufacturing Engineering Annamalai UniversityChidambaram 608002TamilnaduIndia Department of Mechanical Engineering Sai Ram Institute of TechnologyChennai 600044TamilnaduIndia

In this research work,three different reinforcements of Carbon Nano Tubes(in weight%)such as 2%,3%and 4%were added to the magnesium AZ91D grade magnesium alloy to fabricate the Nanocomposites through stir casting *** effects of volume percentage on the mechanical,metallurgical and wear behavior were *** composites with 4%reinforcement show high hardness while the composites with 3%reinforcement show better tensile and yield strength and also an improved wear resistance compared to ***,the characterization of the Nanocomposites were made using Optical Microscopy,Scanning Electron Microscopy,Finite Element-Scanning Electron Microscopy and Transmission Electron Microscopy to understand its nature.

关键词： CNT Magnesium alloy Stir casting Wear behavior

Optimization of machining parameters in drilling hybrid aluminium metal matrix composites

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Transactions of Nonferrous Metals Society of China 2012年第6期22卷 1286-1297页

作者： T.RAJMOHAN k.palanikumar M.kATHIRVEL Department of Mechanical Engineering Sri Chandrasekharendra Saraswathi Viswa Maha Vidyalaya UniversityKanchipuram 631561India Department of Mechanical Engineering Sri Sairam Institute of TechnologyChennai 600044India Department of Mechanical Engineering Sun College of Engineering and TechnologySun NagarErachakulam PostKanyakumari 629902India

Taguchi method with grey relational analysis was used to optimize the machining parameters with multiple performance characteristics in drilling hybrid metal matrix A1356/SiC-mica composites. Experiments were conducted on a computer numerical control vertical machining centre and Lzs orthogonal array was chosen for the experiments. The drilling parameters namely spindle speed, feed rate, drill type and mass fraction of mica were optimized based on the multiple performance characteristics including thrust force, surface roughness, tool wear and burr height （exit）. The results show that the feed rate and the type of drill are the most significant factors which affect the drilling process and the performance in the drilling process can be effectively improved by using this approach.

关键词： hybrid composites Grey relational analysis Taguchi method

Bio Caryota Fiber Reinforced Polymer Composites: Mechanical Properties and Vibration Behavior Analysis

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Journal of Bionic Engineering 2019年第3期16卷 480-491页

作者： kayaroganam palanikumar Vijayakumar Subbiah Department of Mechanical Engineering Sri Sai Ram Institute of Technology Chennai Tamil Nadu India Department of Mechanical Engineerings Sathyabama Institute of Science and Technology Chennai Tamil Nadu India

Polymer composites reinforced with the biofibers are found to have improved applications in many fields and also they can reduce the environmental effect. In this work, caryota-a new natural fiber for polymer composites is fabricated and their tensile, flexural and impact properties are estimated to be used in economical and lightweight load carrying structures. Laminates at different weight fraction (wt%) of 10 wt%, 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt% and 45 wt% are manufactured using a compression molding technique. Results asserted that the unidirectional arrangement having 40 wt% fiber posses good properties. Also the dynamic characteristics such as natural frequency and damping study are carried out for different wt% of unidirectional caryota fiber reinforced composite laminates by ex? perimental modal analysis. From this study, it has been asserted that by using the caryota fiber reinforced polyester composites, the traditional synthetic fiber can be replaced especially in automobile sector. If the caryota fiber reinforced composite material is applied properly, then its application fields will be improved.

关键词： natural fiber caryota fiber reinforcements polymer-matrix composites (PMCs) mechanical properties vibration analysis

Evaluation of mechanical and wear properties of hybrid aluminium matrix composites

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Transactions of Nonferrous Metals Society of China 2013年第9期23卷 2509-2517页

作者： T. RAJMOHAN k. palanikumar S. RANGANATHAN Sri Chandrasekharendra Saraswathi Viswa Maha Vidyalaya University Sri Sai Ram Institute of Technology Department of Mechanical Engineering Saveetha School of Engineering Saveetha University

Hybrid metal matrix composites are important class of engineering materials used in automotive, aerospace and other applications because of their lower density, higher specific strength, and better physical and mechanical properties compared to pure aluminium. The mechanical and wear properties of hybrid aluminium metal matrix composites were investigated. Mica and SiC ceramic particles were incorporated into A1 356 alloy by stir-casting route. Microstructures of the samples were studied using scanning electron microscope （SEM）. The chemical composition was investigated through energy dispersive X-ray （EDX） detector. The results indicate that the better strength and hardness are achieved with A1/10SiC-3mica composites. The increase in mass fraction of mica improves the wear loss of the composites.

关键词： hybrid metal matrix composites SiC mica A1356 stir casting wear loss

Synthesis and Characterization of Nano Ag End Capped L-Cysteine Bridged Diblock Copolymer

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Chinese Journal of Polymer Science 2015年第10期33卷 1404-1420页

作者： M.Jeyapriya B.Meenarathi L.kannammal S.palanikumar R.Anbarasan Department of Polymer Technology Kamaraj College of Engineering and Technology

The target of the present investigation is synthesis and characterization of an amphiphilic diblock copolymer with antibacterial property. Ring opening polymerization （ROP） of ε-caprolactone （CL） and tetrahydrofuran （THF） was carried out under inert atmosphere by using L-cysteine as a bridging agent in the presence of stannous octoate （SO） as a catalyst. The nano silver end capped diblock copolymer was synthesized by in situ method. Thus obtained nano silver end capped L-cysteine bridged diblock copolymer was characterized by various analytical methods like Fourier transform infrared （FTIR） spectroscopy, nuclear magnetic resonance （NMR） spectroscopy, circular dichroism （CD）, fluorescence spectroscopy, gel permeation chromatography （GPC）, X-ray photoelectron spectroscopy （XPS）, thermogravimetric analysis （TGA）, differential scanning calorimetry （DSC）, field emission scanning electron microscopy （FESEM）, high resolution transmission electron microscopy （HRTEM） and zeta potential. The antimicrobial property of the nano silver end capped diblock copolymer against e-coli was tested.

关键词： Ring opening polymerization Amphiphilic diblock copolymer Synthesis XPS HRTEM

Novelty of Different Distance Approach for Multi-Criteria Decision-Making Challenges Using q-Rung Vague Sets

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 3353-3385页

作者： Murugan palanikumar Nasreen kausar Dragan Pamucar Seifedine kadry Chomyong kim Yunyoung Nam Saveetha School of Engineering Saveetha Institute of Medical and Technical SciencesChennai602105India Department of Mathematics Faculty of Arts and ScienceYildiz Technical UniversityEsenlerIstanbul34220Turkey Department of Operations Research and Statistics Faculty of Organizational SciencesUniversity of BelgradeBelgrade11000Serbia College of Engineering Yuan Ze UniversityTaoyuan City320315TaiwanChina Department of Applied Data Science Noroff University CollegeKristiansand4612Norway Artificial Intelligence Research Center(AIRC) Ajman UniversityAjman346United Arab Emirates Department of Electrical and Computer Engineering Lebanese American UniversityByblos1102-2801Lebanon ICT Convergence Research Center Soonchunhyang UniversityAsan31538South Korea Department of Computer Science and Engineering Soonchunhyang UniversityAsan31538South Korea

In this article,multiple attribute decision-making problems are solved using the vague normal set(VNS).It is possible to generalize the vague set(VS)and q-rung fuzzy set(FS)into the q-rung vague set(VS).A log q-rung normal vague weighted averaging(log q-rung NVWA),a log q-rung normal vague weighted geometric(log q-rung NVWG),a log generalized q-rung normal vague weighted averaging(log Gq-rung NVWA),and a log generalized q-rungnormal vagueweightedgeometric(logGq-rungNVWG)operator are discussed in this *** is provided of the scoring function,accuracy function and operational laws of the log q-rung *** algorithms underlying these functions are also described.A numerical example is provided to extend the Euclidean distance and the Humming ***,idempotency,boundedness,commutativity,and monotonicity of the log q-rung VS are examined as they facilitate recognizing the optimal alternative more quickly and help clarify *** chose five anemia patients with four types of symptoms including seizures,emotional shock or hysteria,brain cause,and high fever,who had either retrograde amnesia,anterograde amnesia,transient global amnesia,post-traumatic amnesia,or infantile *** numbers q are used to express the results of the *** demonstrate the effectiveness and accuracy of the models we are investigating,we compare several existing models with those that have been developed.

关键词： Vague set aggregating operators euclidean distance hamming distance decision making

Characterization and application of Cu based superhydrophobic catalyst

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Progress in Natural Science:Materials International 2019年第4期29卷 371-378页

作者： Ramasamy Anbarasan Shanmugam palanikumar Ayyadurai Anitha Devi Ping-Hei Chen kuo Lun Tung Department of Polymer Technology Kamaraj College of Engineering and Technology Department of Chemical Engineering National Taiwan University Department of Mechanical Engineering MEMS Thermal Control Lab National Taiwan University

Superhydrophobic（SH） Copper salt was prepared with the help of three different chemical etching agents and characterized by various analytical techniques like Fourier transform infrared（FTIR） spectroscopy,UV-visible spectroscopy,X-ray diffractogram（XRD）,X-ray photoelectron spectroscopy（XPS）,high resolution transmission electron microscopy（HRTEM） and scanning electron microscopy（SEM）.The SH nature of the material was confirmed by water contact angle（WCA） *** surface with the etching agent was made to produce SH Cu *** the chemical etching agents the system with Cl,F and Si exhibited the SH *** SH hierarchically structured heterogeneous materials produced were used as a catalyst for the reduction of Cr（Ⅵ） and 4-nitrophenol（NiP）.The catalytic activities of the materials were compared on the apparent rate constant(k;) and induction time（T;）.Among the catalyst systems used,the Cu-Trichoropentaflourooctylsilane（TCPFOSi） system exhibited the highest k;and T;values.

关键词： Superhydrophobicity Cu salts Characterization Catalytic reduction Water contact angle