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International journal of manufacturing, materials,... 6건

  1. [해외논문]   Simulation and Reliability Analysis of Laser-Welded Blanks after Metal Surface Finishing Process  

    Pandit, Tanmay (A. Leon Linton Department of Mechanical Engineering, Lawrence Technological University, Southfield, MI, USA ) , Ali, Ahad (A. Leon Linton Department of Mechanical Engineering, Lawrence Technological University, Southfield, MI, USA)
    International journal of manufacturing, materials, and mechanical engineering v.2 no.4 ,pp. 1 - 11 , 2012 , 2156-1680 ,

    초록

    Currently there is a huge competition amongst the OEMs and manufacturers in the auto industry to reduce the weight of the car. A few design modifications or use of different size and grades of materials solves this problem greatly. This paper focuses upon the metal finishing process of Laser Welded Blanks (LWB) with simulation and reliability as well as new process development. These blanks are of same gauge-same gauge or different gauge-different gauge materials. The main aim of this process was to remove the visible portion of the weld on the blank, so that it can be used as a body-outer. A new process was developed using expert knowledge and automated machinery tools. A simulation model was developed to compare with the actual developed method and to detect the bottlenecks and optimize the process. Reliability was a major concern during laser-welded blank operations. The paper addresses prediction of the amount of material removed based on the failed parts and visibility of the weld. This approach could provide competitiveness in the weight of the car which is directly related to fuel efficient and long term survival.

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  2. [해외논문]   Multivariate Optimization of the Cutting Parameters when Turning Slender Components  

    Filho, A.R. Silva (Department of Mechanical Engineering, Universidade Federal de Minas Gerais, Minas Gerais, Brazil ) , Abrã (Department of Mechanical Engineering, Universidade Federal de Minas Gerais, Minas Gerais, Brazil ) , o, A.M. (Institute of Production Engineering, Universidade Federal de Itajubá, Minas Gerais, Brazil ) , Paiva, A.P. (Institute of Production Engineering, Universidade Federal de Itajubá, Minas Gerais, Brazil) , Ferreira, J.R.
    International journal of manufacturing, materials, and mechanical engineering v.2 no.4 ,pp. 12 - 31 , 2012 , 2156-1680 ,

    초록

    The geometric features of the work piece and the cutting parameters considerably affect the quality of a finished part subjected to any machining operation owing to the imposed elastic and plastic deformations, especially when slender components are produced. This work is focused on the influence of the work piece slenderness ratio and cutting parameters on the quality of the machined part, assessed in terms of surface roughness and both geometric (run-out) and dimensional (diameter) deviations. Turning tests with coated tungsten carbide tools were performed using AISI 1045 medium carbon steel as work material. Differently from the published literature, a statistical analysis based on the multivariate one-way analysis of variance (MANOVA) was applied to the data obtained using a Box-Behnken experimental design. In order to identify the combination of parameters (slenderness ratio, cutting speed, feed rate and depth of cut) levels which simultaneously optimize the responses of interest (surface roughness, run-out and diameter deviation), a multivariate optimization method based on principal component analysis (PCA) and generalized reduced gradient (GRG) was employed.

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  3. [해외논문]   Experimental Investigation of Machining Characteristics for the WEDM of Al/ZrO2(p)-PRMMC  

    Garg, Sanjeev Kumar (National Institute of Technology, Kurukshetra, Haryana, India ) , Manna, Alakesh (PEC University of Technology, Chandigarh, India ) , Jain, Ajai (National Institute of Technology, Kurukshetra, Haryana, India)
    International journal of manufacturing, materials, and mechanical engineering v.2 no.4 ,pp. 32 - 46 , 2012 , 2156-1680 ,

    초록

    Presented is an experimental investigation of the machining characteristics and the effect of wire electrical discharge machine (WEDM) process parameters during machining of Al/ZrO2(p) particulate reinforced metal matrix composite (PRMMC). Experiments are carried out to investigate the effects of input parameters such as dielectric conductivity, pulse width, time between pulses, maximum feed rate, servo control mean reference voltage, short pulse time, wire feed rate, wire mechanical tension and dielectric injection pressure on performance measures like cutting velocity and surface roughness. Taguchi method based design of experiment and L36 (2138) mixed orthogonal array have been used for experimental investigation. Servo control mean reference voltage and wire feed rate have been identified as most significant and significant parameter for cutting velocity so called for material removal rate. Time between pulses and short pulse time have been identified as most significant and significant parameter for surface roughness height, Ra (μm). Optimum response characteristics estimated and identified the range of predicted confidence interval at 95% confidence level is 7.459 to 9.995 mm/min. for cutting velocity and 0.602 to 1.261 (μm) for surface roughness height Ra, respectively.

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  4. [해외논문]   Rubber-Toughened Long Glass Fiber Reinforced Thermoplastic Composite  

    Quadrini, Fabrizio (Department of Industrial Engineering, University of Rome “Tor Vergata”, Rome, Italy ) , Prosperi, Claudia (Department of Industrial Engineering, University of Rome “Tor Vergata,” Rome, Italy ) , Santo, Loredana (Department of Industrial Engineering, University of Rome “Tor Vergata”, Rome, Italy)
    International journal of manufacturing, materials, and mechanical engineering v.2 no.4 ,pp. 47 - 58 , 2012 , 2156-1680 ,

    초록

    A rubber-toughened thermoplastic composite was produced by alternating long glass fiber reinforced polypropylene prepregs and rubber particles. Several composite laminates were obtained by changing the number of plies, the rubber powder size distribution, and the stacking sequence. Quasi-static mechanical tests (tensile and flexure) and time dependent tests (dynamic mechanical analysis and cyclic flexure) were carried out to evaluate strength and damping properties. As expected, 10 wt% rubber-filled laminates showed lower strengths than rubber-free laminates but the effect of the rubber on the composite damping properties was evident. At low rates, the rubber particles can also double the dissipated energy under cyclic loading, even if this effect disappears by increasing the test rate.

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  5. [해외논문]   Antimycotic Activity of Nanoparticles of MgO, FeO and ZnO on some Pathogenic Fungi  

    Wani, A. H. (Section of Plant Pathology and Mycology, Department of Botany, University of Kashmir, Srinagar, Kashmir, India ) , Amin, M. (Department of Biomedical Engineering, Sathyabama University, Chennai, India ) , Shahnaz, M. (Department of Biomedical Engineering, Sathyabama University, Chennai, India ) , Shah, M. A. (Department of Physics, National Institute of Technology, Srinagar, India)
    International journal of manufacturing, materials, and mechanical engineering v.2 no.4 ,pp. 59 - 70 , 2012 , 2156-1680 ,

    초록

    Fungi are important pathogens of vegetables, fruits, cereals, pulses, and other crops. Several management strategies have been used for the control of pathogenenic fungi. Each of these methods has one or other limitations. Due to hazardous effects caused by excessive use of pesticides, scientists in the agricultural field are searching for alternative measures against pesticides. As an alternative to chemically manufactured pesticides, use of nanoparticles as antimicrobial agents has become more common as technological advances. Until now, limited research provided some evidence of the application of nanoparticles for the control of plant diseases caused by fungi. In the present study antimycotic activity of nanoparticles of magnesium, Iron and zinc have been investigated under in-vitro conditions and was observed from the study that all the nanoparticles at different concentrations brought about significant inhibition in the germination of spores of Penicillium notatum, Aspergillus niger, and Nigrospora oryzae Berk. However, the highest inhibition in the germination of all the test fungi was observed at higher concentrations followed by lower concentrations of nanoparticles. The nano MgO at highest concentration was found most effective in reducing the spore germination followed by nano-FeO and nano-ZnO at the same concentration respectively.

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    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  6. [해외논문]   Hybrid Modeling and Optimization of Manufacturing : Combining Artificial Intelligence and Finite Element Method  

    Dixit, Uday S. (Indian Institute of Technology Guwahati, Guwahati, India)
    International journal of manufacturing, materials, and mechanical engineering v.2 no.4 ,pp. 71 - 72 , 2012 , 2156-1680 ,

    초록

    Fungi are important pathogens of vegetables, fruits, cereals, pulses, and other crops. Several management strategies have been used for the control of pathogenenic fungi. Each of these methods has one or other limitations. Due to hazardous effects caused by excessive use of pesticides, scientists in the agricultural field are searching for alternative measures against pesticides. As an alternative to chemically manufactured pesticides, use of nanoparticles as antimicrobial agents has become more common as technological advances. Until now, limited research provided some evidence of the application of nanoparticles for the control of plant diseases caused by fungi. In the present study antimycotic activity of nanoparticles of magnesium, Iron and zinc have been investigated under in-vitro conditions and was observed from the study that all the nanoparticles at different concentrations brought about significant inhibition in the germination of spores of Penicillium notatum, Aspergillus niger, and Nigrospora oryzae Berk. However, the highest inhibition in the germination of all the test fungi was observed at higher concentrations followed by lower concentrations of nanoparticles. The nano MgO at highest concentration was found most effective in reducing the spore germination followed by nano-FeO and nano-ZnO at the same concentration respectively.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

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