Current Issue : July - September Volume : 2016 Issue Number : 3 Articles : 4 Articles
Background: The paper presents a study of E500 TMCP European and F500W Russian Arctic shipbuilding thick\nsteel plates. E500 steel plate (thermo-mechanically controlled process (TMCP), 25 mm thickness) and F500W steel\nplate (QT, 30 and 35 mm thickness) are designed for operation in Arctic conditions at temperatures as low as âË?â??40\nand âË?â??60 Ã?°C, respectively.\nMethods: The steels were evaluated in terms of base metal quality and welding performance. Welds and\nbase metal were tested by methods described in International and Russian standards, namely the static\ntension test, Charpy V-notch impact test, drop weight test to determine nil-ductility transition (NDT)\ntemperature, threepoint bending (Tkb) test, and crack tip opening displacement (CTOD) test. European E500\nTMCP steel was evaluated according to the requirements of Russian standards; additionally, the research\nassesses the ability of E500 TMCP steel plates to meet the requirements of special tests required by the\nRussian Maritime Register of Shipping, such as Tkb and NDT tests.\nResults: F500W QT obtains better results in special tests like NDT (âË?â??100 Ã?°C is better than âË?â??65 Ã?°C) and CTOD (CTOD\nâË?â??40 Ã?°C average 1.18 mm > 0.41 mm). Using quenching followed by high tempering enables possible operational\ntemperatures down to âË?â??70 Ã?°C. However, the NDT test is required only in Russian standards. E500 steel base metal tests\nshowed applicability based on criteria of the Charpy test at temperatures as low as âË?â??85 Ã?°C; based on criteria of NDT at\nâË?â??65 Ã?°C; based on Tkb criteria only at âË?â??40 Ã?°C; and CTOD test showed E500 applicability to as low as âË?â??55 Ã?°C. E500\nwelding tests showed, that Charpy impact toughness values are limiting the use of MMA welds to âË?â??20 Ã?°C, and FCAW\nand SAW welds can be utilized with some limitations at âË?â??40 Ã?°C. CTOD of the welded joint showed that E500\napplicability at âË?â??40 Ã?°C is satisfactory just on the borderline of the standard requirements.\nConclusions: The test results showed fair performance for both the European and Russian steels. The steels were\nfound to meet the requirements for Arctic application of both European and Russian standards....
Flexible continuous plastic films are used to produce various products, including optical films and\npackaging materials, because plastic film is suited to use in mass production manufacturing processes.\nGenerally, the web handling process is applied to convey the plastic film, which is ultimately\nrewound into a roll using a rewinder. In this case, wrinkles, slippage and other defects may\noccur if the rewinding conditions are inadequate. In this paper, the authors explain the development\nof a rewinder system that prevents wound roll defectsââ?¬â?primarily starring and telescoping.\nThe system is able to prevent such defects by optimizing the rewinding conditions of tension and\nnip-load. Based on the optimum design technique, the tension and nip-load are calculated using a\n32-bit personal computer. Our experiments have also empirically shown that this rewinder system\ncan prevent roll defects when applying optimized tension and nip-load. Additionally, inexperienced\noperators can control this system easily....
By means of Solid Works, three-dimensional model of automated assembly system was established,\nand kinematic simulation based on Solid Works Motion of assembly process for relay was\nperformed. The simulation results proved the feasibility of mechanical design. Eventually, the\nproductivity was estimated based on simulation analysis. The mechanical design provided a solution\nwith high reference value to practical design of automated assembly system for relay....
The aim of this study was to develop an efficient and realistic response surface optimization technique\nfor the design of V-belt drive for optimum power output of the drive in machinery design.\nOptimization mathematical model of the V-belt drive was constructed. The power output of the\nbelt drive was modeled and optimized by the Response Surface Methodology (RSM). Analysis of\nvariance was used to evaluate the extent of influence of each independent variables on the power\noutput response of the belt drive. A RSM optimization process was proposed to calculate optimal\npower output for V-belt drive given a set of pulley diameter for the drive employed in a tilling\nmachine. The analysis showed that optimum power output of the drive for workshop light operation\nmachinery could be obtained at driving and driven pulley radius range of 550 - 900 mm and\n250 - 500 mm. An optimum power output of 1418.76 kW was obtained at driving and driven pulley\nradius of 846 and 486 mm respectively for a farm tilling machine....
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