Research Papers/Topics in Mechanical Engineering

APPLICATION OF TAGUCHI APPROACH IN THE OPTIMIZATION OF THE MECHANICAL PROPERTIES OF SNAIL-SHELL-FILLER/CHICKEN-FEATHER-FIBRE POLYMER BASED HYBRID COMPOSITE

Many studies are on-going to optimize the properties of composites, this is because composite have found application in different industries due to their advantage of light weight. Scientists have turned their attention to using natural occurring materials for the development of novel materials. Animal waste is playing an important part in this area of application as using it is not only providing benign environmental solution but solving engineering challen...

Modular and 3D-Design of a Fluidised Bed Boiler with Agricultural Residue for Steam Energy Production

Abstract: In this study, a miniature fluidised bed boiler for steam generation was designed and constructed. The boiler ismade up of a steam drum, combustion chamber, downcomer and riser tubes as a heat exchanger, a non-return valve andsuperheater tube. Experimental investigation on the fuel distribution was carried in two-dimensional chamber with crosssection of 500 mm x 1000 mm and bed height of 77 mm, 47 mm and 27 mm. The results obtained from the performanceevaluation of the fluidised bed...

DEVELOPMENT OF A CASSAVA MASH SIEVING MACHINE FOR GARI PROCESSING OPERATIONS

Limited or poor food separation techniques into fine particles for further processing causes post-harvest losses of food crops and initiates the problem of food and nutritional insecurity in Nigeria. In order to solve this problem, food crops needs to be processed into a lasting and nutritious consumable form through the use of mechanization. Different type of material in powder form or solid form is separated by using two-level screening machines. This machine can be used in different indust...

Braking Pattern Impact on Brake Fade in an Automobile Brake System

Abstract. The importance of brake systems in automobiles cannot be overemphasized. Brakes are used in speed control of vehicles and do so by the conversion of kinetic energy into thermal energy. Better stopping performance has favored the disc brake system over the drum brake system and has found wide application in high-performance vehicles. Brake fade, caused by thermal overload has placed a limit on the permissible temperature at which braking systems can function, and it is the...

IMPROVEMENT AND CONSTRUCTION OF A PROTOTYPE OF AN INDUSTRIAL (S1 MODEL) POULTRY FEED MIXING MACHINE

This is a thesis on the improvement of an S1 grinding machine. It has an overview from description of machine, material selection, design and a developed summary to help understand how improvement can be made.ABSTRACT The  need  for  improved  productivity  in  the  agricultural  industry  cannot  be  over-emphasised. One of the key factors that influence this is increased availability of feed for animals. The use of mixing machines ...

DESIGN OF SIX-STROKE INTERNAL COMBUSTION SPARK IGNITION ENGINE

ABSTRACTThe rate at which energy is lost by human activities is enormous. There is need to work on how to generate more energy and minimize the usage of the generated energy. In an internal combustion engine, there is need to focus on gaining energy usage by using generated heat during combustion process. To reduce the energy usage, emission rate and improve the efficiency of four-stroke internal combustion spark ignition engine, the four-stroke internal combustion spark ignition engine is mo...

Use of an exergetic approach to analyze the performance of a vapor compression refrigeration system using a refrigerant solution of a nanoparticle (TiO2), mineral oil, and R410a (base refrige

ABSTRACTThis project illustrates the use of an exergetic approach to analyze the performance of a vapor compression refrigeration system using a refrigerant solution of a nanoparticle (TiO2), mineral oil, and R410a (base refrigerant). Exergy investigation is a thermodynamics strategy which allows for the assessment and improvement of a refrigeration system in terms of efficiency and performance with basis placed on the 2nd law of thermodynamics. The primary objectives of this project are to e...

Generation of electrical power through Gas turbine.

The major components of a gas turbine are compressor, combustors, turbine and generator. It operates by continuous drawing in fresh air into the compressor. The Air is then compressed to a high pressure in the compressor and discharge into the combustion. Here the air is missed with gas and burns continuous once ignited to increase its energy level at constant pressure. The high pressure and temperature combustion product enters an expansion turbine that converts the gas thermal energy into m...

Effect of seawater corrosion on medium Carbon steel 0.34%C and 0.36%C

This project covers a study of the effect of seawater corrosion on 0.34% and 0.36% carbon steel compositions.Two (2) specimens (steel rods) of length 150mm (each) for both steel compositions were obtained. Out of each was gotten four (4) specimens of 10mm length, 10mm diameter and two (2) specimens of 50mm length, 10mm diameter. This yielded a total of twelve (12) samples. For each steel composition, one (1) specimen of 10mm length and one (1) specimen of 50mm length ...

Renewable Energy in Nigeria: A Review

ABSTRACTOne of the most important resources of a nation is energy. The significance of energy definitely cannot be overemphasized as it is immensely utilized in our everyday activities as a very germane requirement for survival and robust lifestyle. The amount of energy availability and its usage in a country measures the level of industrialization. Several devices including machines, electronics, household electrical appliances and other domestic equipment and machines, industrial prod...

Modification of Palm Kernel Cracking and Separating Machine

Abstract- Palm kernel production potentials of several countries are far from been fully exploited. At present, many countries are operating below expected capacity. The motive of the project work is based on fabrication and modification of a palm kernel cracker and separator, so as to help farmers improve the efficiency of output based on time, reduce stress and injuries they incur in the process of cracking palm kernel and separating the kernel seed from the shells manually. The major prin...

Prediction of the penetrated rust into the microcracks of concrete caused by reinforcement corrosion

Consider a steel-rust-concrete composite consisting of a circular cylindrical concrete cover and a coaxial uniformly corroding steel reinforcement. Prediction of the amount of rust penetrated into the microcracks of concrete cover from a set of data measured at the surface of the concrete is of particular interest. The steel is assumed to be linear isotropic and rust follows a power law stress–strain relation. For the concrete, anisotropic behavior and post-cracking softening mo...

Application of nonlocal beam models to double-walled carbon nanotubes under a moving nanoparticle. Part II: parametric study

The capabilities of the proposed nonlocal beam models in the companion paper in capturing the critical velocity of a moving nanoparticle as well as the dynamic response of double-walled carbon nanotubes (DWCNTs) under a moving nanoparticle are scrutinized in some detail. The role of the small-scale effect parameter, slenderness of DWCNTs and velocity of the moving nanoparticle on dynamic deflections and nonlocal bending moments of the innermost and outermost tubes as well as their...

Application of nonlocal beam models to double-walled carbon nanotubes under a moving nanoparticle, Part I, theoretical formulations

The current work suggests mathematical models for the vibration of double-walled carbon nanotubes (DWCNTs) subjected to a moving nanoparticle by using nonlocal classical and shear deformable beam theories. The van der Waals interaction forces between atoms of the innermost and outermost tubes are modeled by an elastic layer. The equations of motion are derived for the nonlocal double body Euler–Bernoulli, Timoshenko and higher-order beams connected by a flexible layer under ex...

Free longitudinal vibration of tapered nanowires in the context of nonlocal continuum theory via a perturbation technique

The free longitudinal vibration of tapered nanowires is investigated in the context of nonlocal continuum theory. The problem is studied for the nanowires with linearly varied radii under fixed–fixed and fixed–free boundary conditions. In order to assess the problem in a more general form, a perturbation technique is proposed based on the Fredholm alternative theorem. The natural frequencies, corresponding mode shapes, and phase velocities of the tapered nanowires are derived ...

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