August '23
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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Impact Energy Study of Foam-Filled Crashworthy Structures of Aluminum and Mild Steel Square Tubes
To ensure the safety of passengers and minimize damage in the event of an accident, it is crucial that a crash-resistant structure be developed. In this paper, square tubes made of aluminum and mild steel served as the primary structural components. Foam of varied densities was packed inside the tubes to absorb and disperse the force of any impacts. The thickness of the square tubes used, in addition to the materials and foam filling, greatly affects the crashworthy structure's ability to resist energy. Two different square tubes, 2 mm and 3 mm in wall thickness, were used in the experiment. The performance of the framework is also affected by the foam insulation. Impact energy may be dispersed and absorbed more effectively if different densities of foam are used in different parts of the product. High-density foam is used where more resistance to impact is needed, while low-density foam is used where more cushioning is required. The crashworthy structure developed is the result of a careful balancing act between the materials, thicknesses and foam filling used.
Novel Arrangement for Pin-Fin Heat Sinks to Improve Efficiency of Thermal Dissipation
The paper presents a 3D design and model of thermo-hydrodynamic behavior, applying Computational Fluid Dynamics (CFD) for pin-fin heat sink with square shape (rectangular fin profile) design through a novel pin arrangement that improves heat removal in the system. The novelty consists in the insertion of a deflector row that will help to direct the flow, such that the air flow directly hits the rectangular cross-sectional fins present in the system. The heat sink model is placed in the channel designed, in which air flows as a suitable medium, and its overall performance is investigated. In addition, a constant heat flux is applied to the bottom wall of the heat sink model that corresponds to the heat flux generated by current electronic equipment and devices. The numerical results of global thermal resistance, pressure drop and Nusselt number are reported. The results allow determining the best arrangement of geometry/configuration, location and functionality of the fin-deflectors, collocated for evaluating the thermal-hydraulic efficiency of the system.
Drilling Performance and Multi-Resolution Vibration Analysis of GFRP
While substantial exploration has been conducted on drilling performances of Glass Fiber-Reinforced Plastic (GFRP) in earlier studies, some key aspects like the influence of process parameters on responses like force, torque, vibration and delamination factor remain to be addressed and viewed holistically. The life of the joint depends on the quality of drilled holes. The paper studies the effect of cutting parameters on responses like cutting force, vibration, delamination factor and surface roughness for different cutting speeds and feed rate during drilling of GFRP material. Two input parameters, viz., speed and feed, are used and the diameter of the drill bit is kept constant for all the cases. From 200 to 300 mm/min feed rate, acceleration increases gradually, and for higher feed rates, the increment in acceleration is less, increasing the peak acceleration rate higher than 2,500 rpm. Start point of the torque cycle is delayed for a few seconds than the thrust force, and torque decreases with increased cutting speed. Delamination factor increases when the cutting speed increases. From the wavelet analyzer, it is observed that all the coefficients of vibration first decrease, and at the approximate feed rate of 300 mm/min, all the coefficients increase.
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