Mechanical Engineering Research Papers/Topics

Advancing Steel Component Repair by Investigating the Surface Properties of Mild Steel Plates Coated with Alumina Using Metal Inert Gas Welding

Abstract Arc-welding coatings are extensively employed within the informal sectors of many African countries to repair various machine components, such as gear teeth, machine shafts, bushings, and many others. In the pursuit of advancing steel component repair techniques, this study investigates the surface properties of mild steel plates coated with alumina using the Metal Inert Gas (MIG) welding process. Mild steel wire of diameter 1.6 mm, alumina particles of size 1 µm, and mild steel pl...

Simulation of deformation behaviour of Aluminium 7075 during Equal Channel Angular Pressing (ECAP)

Abstract This paper presents a finite element simulation of equal channel angular pressing (ECAP) since it is one of the most common and successful severe plastic deformation techniques. This study reports the influence of the most significant factors influencing the ECAP technique. Through finite element simulation, the effect of the die geometry, workpiece geometry, and the pressing speed on the effective strain distributions, damage, and pressing loads, were investigated. The influence of...

The estimation of broiler respiration rate based on the semantic segmentation and video amplification

Abstract Respiratory rate is an indicator of a broilers’ stress and health status, thus, it is essential to detect respiratory rate contactless and stress-freely. This study proposed an estimation method of broiler respiratory rate by deep learning and machine vision. Experiments were performed at New Hope (Shandong Province, P. R. China) and Wen’s group (Guangdong Province, P. R. China), and a total of 300 min of video data were collected. By separating video frames, a data set of 3,000...

DESIGN AND DEVELOPMENT OF TRACTOR MOUNTED POTATO PLANTER

Abstract: Potato is the most important vegetable crop in developing countries. Potato cultivation is a labour intensive work. Human labor is still the main source of power used in agricultural works in Ethiopia. Thus, in manual method of planting there is high wastage of human energy, time and effort. This study was initiated to design, manufacture, test and performance evaluation of a prototype tractor mounted potato planter. The prototype planter consisted of main frame, hopper, casing, fu...

Tungsten carbide thin films review: effect of deposition parameters on film microstructure and properties

Abstract: In this work, the property of physically deposited thin WC films with respect to deposition parameters and conditions reported by previous researchers is being reviewed. The study provides deeper insight to the effect of deposition parameters as well as preliminary selection of parameters for optimization of the WC film preparation for improved tribological properties for industrial applications. Not much studies of WC thin films deposited though PVD methods have been reviewed henc...

Effect of media shape on particle breakage in a batch ball mill: lessons learnt from population balance model and attainable region technique

Abstract: The batch grinding equation and the Attainable region technique tools were used in evaluating data obtained from the breakage of quartz ore in a laboratory batch ball mill. Using the same milling conditions and grinding equipment, test results were evaluated through the breakage distributions of different size fractions. Results prove that mixing different grinding media increases volume of grinding zones and that translates to an improvement in grinding kinetics and amount of requ...

Effect of interstitial filling, ball and feed size on particle breakage in a laboratory ball mill: an attainable region technique

Abstract: The interstitial filling, grinding media and feed particle size are vital parameters to be considered during ball mill operation. Experiments were conducted to ascertain whether there are possible interactions between the three variables and the fineness of the required product. The data obtained was analysed using the Attainable Region (AR) optimization method which is a model-free and equipment-independent tool. Experimental results indicate that there is a need to adjust or corr...

Turbulent flow inside longitudinally corrugated pipes

Abstract: Longitudinally corrugated pipes can be described as pipes with periodically converging-diverging cross-area arranged along the flow course. These pipes are mainly utilized in engineering applications, for example, pipe flow in a heat exchanger where wall corrugation improves heat convection,gas to liquid contractors in the chemical business, ventilation, air conditioning, drag reduction and mass transfer efficiency. Both experimental and analytical works detailed the impact of c...

Hydrothermal and entropy production analyses of magneto-cross nanoliquid under rectified Fourier viewpoint: a robust approach to industrial applications

Abstract: The present article has been groomed to explore the boundary-driven magnetized flow of cross nanoliquid over thin needle subject to auto catalysis chemical reactions. In addition to it, the effect of entropy optimization model is incorporated and transportation of heat under non-uniform heat source/sink, Cattaneo-Christov heat flux (rectified Fourier) viewpoint (CCHF), and non-linear thermal radiation is also taken into account. Furthermore, the Brownian and thermophoresis aspects ...

Design, modelling, and simulation of solar photovoltaic driven air-conditioning systems for herbaria collection in Botswana

Abstract: The demand for cooling has grown exponentially over the past century to meet economic development, availability, comfort and social needs, accounting for over 10% of the global electricity consumption and growing. Rising global temperatures have also contributed to the growing need for cooling in buildings. Cooling, is a very energy-intensive process that can account for 20% to 75% of a building's energy, depending on the building use. Solar photovoltaic (PV) driven air-conditionin...

Evaluation of Dunaliella salina microalgae for biodiesel production a case study (Botswana Ash Company)

Abstract: Production of biodiesel from microalgae has received worldwide recognition as an alternative to petroleum diesel. The process involves culturing, harvesting, drying, extraction, transesterification and characterisation of the microalgae biomass to biodiesel. The research aimed to investigate the potential of Dunaliella salina microalgae inhabiting in Botash Company’s solar ponds Botswana for biodiesel production. Optimum salinity and nutrients concentrations that produced maximum...

Design of a gas atomising system capable of producing suitable aluminium powder for Selective Laser Melting (SLM) process

Abstract: Documentation on the correct process parameters and component requirements for setting up efficient aluminum powder production systems capable of manufacturing powder that meets the requirements for the selective laser melting (SLM) process is not available due to its proprietary nature. This hinders powder metallurgy (PM) trainees in acquiring knowledge and skills needed in setting up such metal powder production systems. To address this challenge, powder requirements for the SLM ...

Lateral crashworthiness response of bombyx mori fibre/glass–fibre/epoxy hybrid composite cylindrical tubes-experimental

Abstract: Experimental studies were undertaken to investigate the effect of reinforced fibre hybridization on the crushing characteristics of quasi-static laterally compressed cylindrical composite tubes. Woven glass fibre (GF) and woven bombyx mori fibre (B.mori) were used as reinforcements and industrial epoxy was used as the matrix material to fabricate the reinforced hybrid composite specimen. Three sets of specimen were fabricated, (1) glass fibre/epoxy (2) B.mori fibre/epoxy and (3) GF...

A review on drones controlled in real-time

Abstract: This paper presents related literature review on drones or unmanned aerial vehicles that are controlled in real-time. Systems in real-time control create more deterministic response such that tasks are guaranteed to be completed within a specified time. This system characteristic is very much desirable for drones that are now required to perform more sophisticated tasks. The reviewed materials presented were chosen to highlight drones that are controlled in real time, and to includ...

A secured and efficient communication scheme for decentralized cognitive radio-based internet of vehicles

Abstract: The advancements in hardware technologies have driven the evolution of vehicular ad hoc networks into the Internet of Vehicles (IoV). The IoV is a decentralized network of IoT-enabled vehicles capable of smooth traffic flow to perform fleet management and accident avoidance. The IoV has many commercial applications due to improved security and safety on the roads. However, the rapidly increasing number of wireless applications have challenged the existing spectrum bands allocated t...


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