May '22
The IUP Journal of Mechanical Engineering
ISSN: 0974-6536
A 'peer reviewed' journal distributed by EBSCO and Proquest Database
It is a quarterly journal that publishes research papers dealing with Production engineering, Industrial engineering; Materials engineering; Solid mechanics; Solid and structural mechanics; Fluid mechanics; Fracture mechanics; Biomechanics; Metallurgy, Tribology, Heat transfer; Welding technology; Composite materials; Machine design CAD/CAM; Renewable energy technology; Mechanical maintenance; Refrigeration & Air-conditioning; Quality control and Operational research, etc.
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A Study of Process and Tool Parameters on Friction Stir Welding of AA 6061 Joints
Friction Stir Welding (FSW) procedure is utilized for joining material, for example, aluminum, copper, magnesium and so on. It is a clean, environment-accommodating, and non-harmful process as it is neither accompanied by a circular segment arrangement and radiation nor toxic gas discharge. It has low warmth input and no weld finishing costs (Shukla and Shah, 2010). The paper examines the utilization of Taguchi method for augmenting tensile strength of friction stir welded Al 6061 alloy. The impact of process parameters on rigidity of welded joints and signal-to-noise ratio of robust design are assessed. The various process parameters, such as tool rotation speed, welding speed, tool design, axial load, etc., play a critical role in obtaining better and defect-free joints. We considered the geometry of tool of the welding joint separated from other parameters like temperature and pressure. The impact of welding parameters on the greatest temperature improvement has been studied. We used AA6061 similar material for flow stress, temperature and pressure analysis with Hyper works 9.0.
Effect of Cryogenic Treatment on Tool Life
The most-used tool material in the manufacturing industries is High Speed Steel (HSS). Many researchers have already proved that the cryogenic treatment of tool and die steels is the most effective technology to increase wear resistance and improve surface quality of the machined parts. In this study, we have conducted cryogenic treatment on tool material with three specimen groups of AISIM2 tool steel. The first group was Conventionally Heat Treated (CHT), the second was Shallow Cryogenically Treated (SCT), and the third group was Deep Cryogenically Treated (DCT). Turning operation was performed on the entire AISIM2 tool steel samples. A stop watch was used to note down the time at the starting and end of each run of turning operation, and tool maker's microscope was used to measure the flank wear at the end of each run. It has been noticed that there is improvement in tool life in terms of flank wear of DCT and SCT as compared with CHT tools. Also, DCT tools reported significant enhancement in cutting life of the tool as compared with SCT.
Evaluating the Performance of Electroplated Composite Fins in Plate Heat Exchangers
The paper analyzes heat transfer in a longitudinal rectangular composite fin. Temperature-dependent thermal conductivity is carried out for forced convections with the aid of pin-fin apparatus. The fins used are electroplated and the base material is covered with a coating of another metal (say, copper coating on aluminum by hydrolysis) which has higher thermal conductivity than the base metal. The rate of electroplating by which the metal deposition takes place is 0.25 micrometers/min (approx.). The sulphates and nitrates of corresponding metals to be deposited are used in performing electroplating. Then the composite rectangular fin is analyzed on different parameters. The results are further validated using ANSYS.
Seismic Assessment and Retrofitting of an Elevated Water Tank Using Active Tendon Control
The paper presents a seismic assessment and advanced retrofit study on a reinforced concrete elevated water storage tank. Retrofitting of old heritage water tanks like Tala Tank in Kolkata is very essential, otherwise these old structures may collapse any time. The dynamic behavior of the fluid is simulated using the classical convective and impulsive mass model, for which a discrete three-dimensional schematization is initially implemented in the finite element model. The time-history assessment inquiry highlights excessive deformation of the water tank or even collapse of the frame structure. Based on these results, one retrofitting technique is proposed, namely, an active tendon system. The mechanical parameters, design criteria and technical implementation details are illustrated. The verification time-history analyses in protected conditions show that a substantial enhancement of the seismic response capacities of the structure is attained as compared to the original structure.
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