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Analysis of Specimen Dimensions in Torsion Testing of AISI 1020 Steel using Single Objective Taguchi Method and Multi Objective Grey Relational Analysis 用单目标田口法和多目标灰色关联分析法分析AISI 1020钢扭转试验中试样尺寸
Pub Date : 2017-05-05 DOI: 10.51983/arme-2017.6.1.2425
R. D. Patil, Purushottam N. Gore
The current study aims at investigating the influence of solid specimen dimensions such as total length, useful length, outer diameter and fillet radius on torsion test results of mild (AISI 1020) steel.L9 orthogonal array was selected for design of experiments. Three important output parameters of torsion testing such as modulus of rigidity, yield shear stress and ultimate shear stress were calculated by using Nadai method. Attempt was further made to simultaneously optimize the specimen dimensions using grey relational analysis. The recommended optimized combination based on studied output parameters was found to be total length =162 mm, useful length =50 mm, outer diameter =10 mm and fillet radius =2.5 mm. The confirmation test was also carried out to check the analysis.
本研究旨在探讨试件总长度、有效长度、外径和圆角半径等实体尺寸对低碳钢(AISI 1020)扭转试验结果的影响。选用L9正交阵列进行试验设计。采用那代法计算了扭转试验的三个重要输出参数:刚度模量、屈服剪应力和极限剪应力。进一步尝试利用灰色关联分析对试样尺寸进行同步优化。根据所研究的输出参数,优选出总长度为162 mm,有效长度为50 mm,外径为10 mm,圆角半径为2.5 mm的最佳组合。对分析结果进行了验证试验。
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引用次数: 0
Heat Transfer Enhancement Using Electrohydrodynamic and Magnetohydrodynamic Techniques: A Review 电流体力学和磁流体力学强化传热技术的研究进展
Pub Date : 2017-05-05 DOI: 10.51983/arme-2017.6.1.2426
Nikhil S. Mane, Mukund L. Hargude, Mahesh Mali
Increasing heat transfer from heat exchangers using different active and passive techniques is main focus of many researchers. Heat transfer enhancement saves energy and decreases the size of heat transfer equipments and as heat transfer equipments are used in many industries the effect of these new techniques can be implemented at number of applications. The heat transfer enhancement is mostly concentrated in the area of extended surfaces but many new and innovative techniques are also emerging in the research.Electrohydrodynamics and Magnetohydrodynamics are the newly developed techniques which can be used to enhance the heat transfer in many processes. This paper provides a review on the use of electrohydrodynamic and magnetohydrodynamic techniques in heat transfer enhancement with their different accepts.
利用不同的主动和被动技术来增加换热器的换热是许多研究者关注的焦点。强化传热可以节省能源,减小传热设备的尺寸,并且由于传热设备在许多行业中使用,这些新技术的效果可以在许多应用中实现。强化传热主要集中在扩展表面,但也出现了许多新的创新技术。电流体力学和磁流体力学是近年来发展起来的新技术,可用于许多过程的热传递。本文综述了电流体力学和磁流体力学技术在强化传热中的应用,并对它们的不同用途进行了综述。
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引用次数: 0
Heat Transfer Enhancement in a 4-Holed Cored Brick Regenerator by Inducing Turbulence 通过诱导湍流增强4孔芯砖蓄热器的传热
Pub Date : 2017-05-05 DOI: 10.51983/arme-2017.6.1.2422
P. Ramakrishnan, A. S. Krishnan
The article reports on the transient heat transfer and fluid flow in the sensible heat storage device using Computational Fluid Dynamics. The geometry considered is a cylinder of 455mm length and 43mm diameter made up of mild steel material. Numerical investigations have been done for a porosity of 0.4 and inlet velocity of 2m/s which corresponds to mass flow rate of 0.0035 kg/s by use of commercial CFD software. In CFD software the three dimensional geometrical model of the cored brick heater was modelled, meshed and simulated for 4 holed cored brick which corresponds to the hole size of 13.6mm. The fluid flow was considered to be incompressible with k-ε model to predict turbulence, and the thermo-physical properties of fluid and solid were assumed to remain constant. Thermal performance of storage system such as charging and discharging time were evaluated. A parametric study was conducted for different thermal conductivity, to simulate axial temperature variation and pressure drop across the system. Temperature simulations are carried out by input as 465K as the condition in the regenerator. The lateral and outlet condition of the regenerator are given as adiabatic and atmospheric condition. This paper represents the fluid flow across the 4 hole cored brick with and without inducer, where the inducer induces the laminar flow to turbulent. Thus the fluid flows is at low Renoylds number in the laminar regime and due to the presence of the inducer the flow get transformed to higher Renoylds number in the turbulent regime. Analysis is made for without inducer, inducer at the entrance of each holes and inducer is just next to the developing length on each holes. Result of the computational analysis was made for cases with and without the presence of inducer.
本文用计算流体力学方法研究了显热装置内的瞬态传热和流体流动。考虑的几何形状是一个长度为455mm,直径为43mm的圆柱体,由低碳钢材料制成。在孔隙度为0.4、进口速度为2m/s(质量流量为0.0035 kg/s)的条件下,利用商业CFD软件进行了数值研究。在CFD软件中,对孔尺寸为13.6mm的4孔芯砖加热器的三维几何模型进行建模、网格化和仿真。采用k-ε模型将流体流动视为不可压缩,并假设流体和固体的热物性保持不变。对储能系统的充放电时间等热性能进行了评价。对不同的导热系数进行了参数化研究,模拟了整个系统的轴向温度变化和压降。以输入温度为465K作为蓄热器的条件进行温度模拟。蓄热器的侧向和出口条件分别为绝热和常压条件。本文研究了有和无诱导体时流体在4孔芯砖上的流动,其中诱导体将层流诱导为湍流。因此,流体在层流状态下以低雷诺数流动,而在湍流状态下由于诱导剂的存在而向高雷诺数流动。分析了无诱导、各孔入口处诱导和各孔发展长度附近诱导的情况。对存在和不存在诱导体的情况进行了计算分析。
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引用次数: 2
Effect of Inclination on Efficiency of Heat Pipe 倾角对热管效率的影响
Pub Date : 2017-05-05 DOI: 10.51983/arme-2017.6.1.2419
B. Kabnure, Rajkumar.D. Patil
Heat pipes are used in several applications, where one has limited space and the necessity of a high heat flux. Of course it is still in use in space applications, but it is also used in heat transfer systems, cooling of computers, cell phones and cooling of solar collectors. Especially for micro applications there is micro heat pipes developed as for cooling the kernel of a cell phone down. Due to limited space in personal computers and the growing computational power it was necessary to find a new way to cool the processors down. By means of a heat pipe it is possible to connect the processor cooling unit to a bigger cooling unit fixed at the outside to cart of the energy.In this paper, different tests were carried out at the different angle of inclination of heat pipe having same current and voltage. The efficiencies at each angle of inclination are calculated from the obtained data.
热管在空间有限和需要高热流密度的情况下有多种应用。当然,它仍然在空间应用中使用,但它也用于传热系统,冷却电脑,手机和冷却太阳能集热器。特别是在微型应用中,有微型热管被开发出来用于冷却手机内核。由于个人电脑的空间有限,而计算能力不断增强,因此有必要找到一种新的方法来冷却处理器。通过热管,可以将处理器冷却单元连接到固定在能量车外部的更大的冷却单元。本文在相同电流和电压下,对不同的热管倾斜角度进行了不同的试验。根据所获得的数据计算出各倾角下的效率。
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引用次数: 0
Investigating Feed Rate Effect on Cutting Force of EN 8 Turning 研究进给速度对en8车削切削力的影响
Pub Date : 2017-05-05 DOI: 10.51983/arme-2017.6.1.2424
V. B. Magdum, Vinayak R. Naik
This paper deals with the measurement of cutting force components generated in turning for different cutting parameters and different tools having various feed rates while machining EN 8 steel. The feed rates of the tool were changed using selected cutting parameters; thus, the cutting force components were measured. The selected cutting variables and the tools in different feed rates were tested practically under workshop conditions. During the tests, the depth of cut and cutting speed were kept constant and each test was conducted with a sharp tool. Finally, the effects of cutting parameters and feed rates on cutting forces were analyzed. A cylindrical EN8 work piece was turned using Carbide tools for three feed rates (0.065. 0.13 and 0.26 mm/rev). For feed rate angle, keeping the cutting speed (384 rpm.) and depth of cut (1 mm) constant. During the experimentation, the forces were measured using a dynamometer. The experimental results show that the thrust force (Ft) is greater than the feed force (Ff) irrespective of the feed rates. The cutting forces were found to increase with the increase in feed rate.
本文研究了在加工en8钢时,在不同切削参数和不同进给速度下,车削时产生的切削力分量的测量。使用选定的切削参数改变刀具的进给速度;因此,测量了切削力的分量。选定的切削变量和刀具在不同进给量下在车间条件下进行了实际试验。在试验过程中,保持切削深度和切削速度不变,每次试验都使用锋利的刀具进行。最后,分析了切削参数和进给速度对切削力的影响。用硬质合金刀具在三种进给速率下(0.065。0.13和0.26毫米/转)。对于进给速度角,保持切割速度(384转/分)和切割深度(1毫米)不变。在实验过程中,力是用测功机测量的。实验结果表明,无论进给速度如何,推力Ft都大于进给力Ff。切削力随进给速率的增大而增大。
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引用次数: 0
Design of Milling Fixture in Mass Production of Pivot Block 轴块批量生产中铣削夹具的设计
Pub Date : 2017-05-05 DOI: 10.51983/arme-2017.6.1.2423
Rajkumar.D. Patil, Dothre Dinesh, Hegade Sachin, Killedar Vishal
Fixtures are essential elements of production processes as they are required in most of the automated manufacturing, inspection, and assembly operations. Mass production methods demand a fast and easy method of positioning work for accurate operations on it. Jigs and fixtures are production tools used to accurately manufacture duplicate and interchangeable parts. This paper aims at the Design of milling fixture using CATIA software. A milling fixture is used to hold and support the work piece in proper position during the milling operation. It is the manually operated simple milling fixture. Use of this milling fixture causes ease in operation, cost reduction, easy maintenance and replacement. In today’s fast growing industrial sector this milling fixture plays very important role by saving time to achieve quality work pieces and components.
夹具是生产过程的基本要素,因为它们在大多数自动化制造、检验和装配操作中都是必需的。大规模生产方法需要一种快速简便的定位工作方法,以便对其进行准确操作。夹具和夹具是用于精确制造重复和可互换零件的生产工具。本文的目的是利用CATIA软件进行铣削夹具的设计。铣削夹具用于在铣削过程中将工件固定在适当的位置上。它是手动操作的简易铣削夹具。使用这种铣削夹具易于操作,降低成本,易于维护和更换。在当今快速发展的工业领域,这种铣削夹具通过节省时间来实现高质量的工件和部件起着非常重要的作用。
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引用次数: 1
Design, Manufacturing and Analysis of Alloy Steel Brake Disc 合金钢制动盘的设计、制造与分析
Pub Date : 2017-05-05 DOI: 10.51983/arme-2017.6.1.2420
P. Badkar, D. Kalai
Each single system has been studied and developed in ordered to meet the safety requirement. Instead of having air bag, good suspension systems, good handling and safe cornering, there is one most critical system in the vehicle which is brake system. Without brake system in the vehicle will put a passenger in unsafe position. Therefore, it is must for all vehicles to have proper brake system. In this paper alloy steel disc brake material use for calculating normal force, shear force and piston force And also calculating the brake distance of disc brake. The standard disc brakes two wheelers model using in ANSYS and done the Thermal analysis and Model analysis also calculate the Heat flux and Temperature of disc brake model. This is important to understand action force and friction force on the disc brake new material, how disc brake works more efficiently, which can help to reduce the accident that may happen in each day.
为了满足安全要求,对每一个系统都进行了研究和开发。除了安全气囊、良好的悬架系统、良好的操控性和安全的转弯,车辆中还有一个最关键的系统,那就是制动系统。没有刹车系统的车辆将使乘客处于不安全的境地。因此,所有车辆都必须有适当的制动系统。本文对所用的合金钢盘式制动器材料进行了法向力、剪切力和活塞力的计算,并对盘式制动器的制动距离进行了计算。在ANSYS中对标准盘式制动器两轮模型进行了热分析和模型分析,并计算了盘式制动器模型的热流密度和温度。这对于了解盘式制动器新材料上的作用力和摩擦力,盘式制动器如何更有效地工作是很重要的,这有助于减少每天可能发生的事故。
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引用次数: 0
Mechanical Design of Extended Chassis Frame for Defence Vehicle 国防车辆扩展底盘框架的机械设计
Pub Date : 2016-11-05 DOI: 10.51983/arme-2016.5.2.2418
P. A. Naik, D. Kalai
Generally defence vehicles are considered has the roughed machines, they can withstand very harsh environment. The defence vehicles generally have all wheel drives which enable them to tread difficult terrain and these vehicles are made of high strength materials with high factor of safety. This project is focused to design and analysis of extended chassis frame for such a vehicle. The vehicle chosen in this project is an eight wheeled vehicle with all wheels drive system (8×8) which is connected to the engine through a low deferential gear box. There is a need of adding additional super structure (extra pay loads) on the same vehicle. Extending the present chassis with the help of reinforcement at right locations will be a very effective technique for wide variety of mounting applications. Thus using the extended chassis frame many mounting can be installed/mounted without considerable change in the overall design; this is also economical.This project work is focused on Re-design of chassis frame by extending it by 900 mm at rear, based on end user requirement to withstand the different super structure loads, the same structure will be statically analyzed by using Finite Element Analysis method to verify the reinforcement of chassis frame and also to study the dynamic characteristics. This work involves static and dynamic analysis to determine key characteristics of a truck chassis. The static characteristics include identifying location of high stress area and the dynamic characteristics of truck chassis such as the natural frequency and mode shape.
一般来说,国防车辆被认为是粗糙的机器,它们可以承受非常恶劣的环境。国防车辆一般都有全轮驱动,使它们能够踏过困难的地形,这些车辆由高强度材料制成,具有高安全系数。本项目主要对该类车辆的扩展底盘框架进行设计与分析。本项目选用的车辆为全轮驱动系统的八轮车辆(8×8),通过低差齿轮箱与发动机相连。有必要在同一辆车上增加额外的上层结构(额外的有效载荷)。在正确的位置加强现有的底盘将是一种非常有效的技术,适用于各种安装应用。因此,使用扩展的底盘框架许多安装可以安装/安装在没有相当大的改变整体设计;这也是经济的。本项目工作重点是对底盘车架进行重新设计,将车架后部加长900mm,根据用户要求承受不同上部结构荷载,对同一结构进行静力分析,采用有限元分析方法对底盘车架进行加固验证,并对其动力特性进行研究。这项工作包括静态和动态分析,以确定卡车底盘的关键特性。静态特性包括识别高应力区域的位置和卡车底盘的固有频率和振型等动态特性。
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引用次数: 0
Optimization of Cutting Parameters in Rough Turning using Taguchi Method 基于田口法的粗车削切削参数优化
Pub Date : 2016-11-05 DOI: 10.51983/arme-2016.5.2.2415
A. P. Dhawan, T. Shinde
A machining process involves many process parameters which directly or indirectly influence the surface quality of the product. Current investigation on turning process is a Taguchi optimization technique applied on the most effective process parameters i.e. feed, cutting speed and depth of cut. In this project Taguchi method is used to optimize cutting parameter for surface roughness and material removal rate. The obtained results were verified by using minitab software. The optimized value of cutting speed, feed rate and depth of cut is obtained for both MRR (material removal rate) and Surface roughness. Confirmation test is carried out for the purpose of verification. Main effect plots are generated and analyzed to find out the relationship between cutting parameter and variables. The details of experimentation and analysis are given in the following context.
机械加工过程涉及许多直接或间接影响产品表面质量的工艺参数。目前研究的车削过程是田口优化技术应用于最有效的工艺参数,即进给量,切削速度和切削深度。本课题采用田口法对切削参数进行表面粗糙度和材料去除率的优化。用minitab软件对所得结果进行了验证。得到了切削速度、进给量和切削深度对材料去除率和表面粗糙度的最优值。确认试验是为了验证而进行的。生成主效应图并进行分析,找出切削参数与各变量之间的关系。实验和分析的细节将在下文中给出。
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引用次数: 0
Review of Equal Channel Angular Pressing System 等通道角压系统研究进展
Pub Date : 2016-11-05 DOI: 10.51983/arme-2016.5.2.2417
Umesh C. Rajmane
Equal channel angular pressing (ECAP) is a forming procedure. The Equal Channel Angular Pressing is a hardening treatment with which ductile metals can be processed to refine their grain and sub-grain structure. This process enhances the mechanical strength of metals in terms of tensile strength, stress-controlled fatigue strength, and fatigue crack growth resistance. The Equal Channel Angular Pressing is a hardening treatment with which ductile metals can be processed to refine their grain and sub-grain structure. This process enhances the mechanical strength of metals in terms of tensile strength, stress-controlled fatigue strength, and fatigue crack growth resistance. In this review, underline some critical aspects that have to be more investigated.
等道角压成形(ECAP)是一种成形工艺。等径角压是一种硬化处理,可使韧性金属加工细化其晶粒和亚晶粒组织。这一过程提高了金属在抗拉强度、应力控制疲劳强度和抗疲劳裂纹扩展方面的机械强度。等径角压是一种硬化处理,可使韧性金属加工细化其晶粒和亚晶粒组织。这一过程提高了金属在抗拉强度、应力控制疲劳强度和抗疲劳裂纹扩展方面的机械强度。在这篇综述中,强调一些需要进一步研究的关键方面。
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引用次数: 0
期刊
Asian Review of Mechanical Engineering
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