ABSTRACT Some physical and mechanical properties of small diameter poles obtained from guava (Psidium guajava L) tree branches in relation to their potential use for truss fabrication were determined. The average green moisture content of wood from five replicate samples of debarked tree branches was 84%. The wood samples were naturally resistant to termite attack with and without the bark on. The mean oven-dry density of the wood samples was 674 kg/m3. This puts it in the density category of...
ABSTRACT The computer-aided software developed in this research work is used in designing cam systems by generating various follower motions and cam profiles. It is highly suited for extensive dynamics, kinematics and geometric design analysis based on some inherent features that are unique. The plate cam with either flat-face or roller followers can be designed. Most of the standard and acceptable cam functions are included such as double harmonic, modified trapezoidal, cycloid, 4-5-6 polyno...
Abstract Plate washing is a daily activity across the globe which involves a lot of energy to accomplish manually or mechanically. The objective of this work is to design and fabricate a dish washing machine that is efficient and easy to operate. Stainless steel and mild steel was used for the construction of the machine considering their availability, cost reduction and corrosion resistance. The motor used a power of 0.75hp (559.5 W), voltage of 240V and a speed of rotation of “1200 r.p.m�...
Abstract Titanium and its alloys are an important group of engineering materials, with a wide range of applications in aerospace, aircraft, automotive, chemical and biomedical industries. They have excellent combination of strength and fracture toughness as well as low density and excellent corrosion resistance but with poor machinability due to their low thermal conductivity and high chemical reactivity with cutting tool materials. In this study, the effects of cutting parameters and tool we...
ABSTRACT Despite the low-level of Technological inputs and assimilation in Nigeria in general, Business operations have benefited considerably from Technology. Technology input haw been in form.of vastly improved communications, power availability, distribution, new tools of machinery for production, and health facilities. In this paper, the situation of Transportation and Food industries are focussed on in respect of great changes that have taken place therein. Suggestion on the practical wa...
ABSTRACT In metal cl.Itting operations, performance of the cutting tool is the major determinant of the productivity, functionality and production cost of the machined component. In this work, the performance of uncoated cemented carbide tools with International Standard Organisation (ISO) designation SNMA 120406 was evaluated for tumitu; of NST 37.2 steel. Turning operations were conducted on M300 /-Iarrison type lathe driven by 3.0 hp Kapak induction motor. The cutting conditions used were:...
Abshct : This paper focuses on the design appreciation of a washing machine or a washer. A washer is designed to clean laundry, such as clothing, towels and sheets. All washing machines work by using mechanical energy, thermal energy, and chemical action. Mechanical energy is imparted to the clothes load by the rotation of the agitator in top loaders, or by the tumbling action of the drum in front loaders. Detailed components designs were carried out on all the major elements of the washing m...
Abstract Upper bound solutions to a 4-High reversing aluminium cold-rolling sheet mill was obtained in this work using both analytical and graphical methods. The upper bound method was applied to the rolling of an Al 1200 sheet from 7mm to 0.6mm in six passes. It was observed that both methods were very effective in predicting upper bound load value with the graphical method giving a higher value using input velocity values from industry. However, it was observed that the graphical method bec...
ABSTRACT All real physical structures behave dynamically when subjected to loads or displacements. This research paper, therefore, presents seismic response of field fabricated liquefied natural gas spherical storage vessels using finite element analysis. The seismic analysis procedure used represents a practical approach in quantifying the response of spherical storage vessel with its content when it is subjected to seismic loading. In the finite element method approach, six degrees of freed...
Abstract: The microstructure of the base alloy and thermomechanical affected zone (TMAZ) of inertia friction welded powder metallurgy (PM) RR1000 were examined by the use of stan'dard metallograpllic tecl~niques involving optical. analytical scanning and msrnission elmtron inicmsmpes equipped with enew dispersive spectrometer nnd an electron probe micro analyscr. It was discovered that liquation of grain boundary phases present in the pre-weld alloy resulted in the formation of eutectic type ...
ABstra& Mmy engheedng applidbw idhe problem cfa hielo ading pprp which is ojet: IIU~to lmck and criticrrl in design anrjysiz Tlis winch4@ de- Imming JO- developed in this work incorpamtes the gmphical display of djlnmnlc WingO PI the Enek or rope ~Jlltew inc11 Ifl within hef irst ssm& of fis opernd011T. he learning @am oUma tlts umr to gene- a profile of this load arid ia amelemtion agaimt time in order to obIain ihe humwh bs of the Iaard io be boms by wkde uniL IP~Lfmt~irse u nderplayed in n...
Abstract: The objective of this study is to investigate the influence of service situation on the mechanical properties of plain nails manufactured from low carbon steel. The influence of the degree of cold drawing on the mechanical properties and strain hardening of the material is investigated by tensile test experimentation. The stress-strain relationships of the cold-drawn low carbon steel were investigated over the 20, 25, 40 and 55% degree of drawn deformation for the manufacture of 4, ...
ABSTRACT This paper presents the application of Artificial Neural Network (ANN) in modeling the heat transfer coefficient of a staggered multi-row, multi-column, cross-flow, tube-type heat exchanger. Heat transfer data were obtained experimentally for air flowing over a bank of copper tubes arranged in staggered configuration with 5 rows and 4 columns at different air flow rates with throttle valve openings at 10 - 100%. The Reynolds number and the row number were used as input parameters, wh...
Abstract Optimization of production downtime in plastic manufacturing serves as a method to minimize machine downtime. This paper describes how to minimize machine downtime using multiple regression analysis in Statistical Package for Social Sciences (SPSS) and graphs was also used to predict the effective of downtime to cycle time, weight, production capacity, overall equipment effectiveness (OEE) and graphs were plotted accordingly. The Overall Equipment Effectiveness (OEE) of the company w...