Browsing Mechanical Engineering by Issue Date
Now showing items 1-20 of 191
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The development of instrumentation for the direct measurement of heat loss from man in a normal working mode.
(1974)Based on a theoretical analysis of the heat transfer process between the human body and its environment, graphs are presented for determining the theoretical skin surface temperatures and sweat rates as a function of the ... -
The measurement of axial turbine tip clearance flow phenomena in a moving wall annular cascade and in a linear cascade.
(1989)On unshrouded axial flow turbine rotors, the tip clearance, required for thermal expansion and manufacturing limitations, allows fluid to leak from the pressure side to the suction side of the blade. This flow across the ... -
Communication, mapping and navigational aspects for a free-ranging, automated guided vehicle.
(1992)A free-ranging automated guided vehicle incorporating navigation and radio communication for use in a fully automated flexible manufacturing system has been developed. A vehicle, operating as a complete subsystem, was built ... -
Modelling saturated tearing modes in tokamaks.
(1992)In this thesis a model for saturated tearing mode islands is developed. The equations for the mode amplitudes are essentially those of R B White et al,after a pertubation expansion has been made. It is well known that ... -
The performance of a one and a half stage axial turbine including various tip clearance effects.
(1993)The necessary clearance at the tip of unshrouded rotors of axial turbines allows fluid to leak from the pressure to the suction side of the blade and produces an important component of loss that is ultimately responsible ... -
Analysis and design optimization of laminated composite structures using symbolic computation.
(1994)The present study involves the analysis and design optimization of thin and thick laminated composite structures using symbolic computation. The fibre angle and wall thickness of balanced and unbalanced thin composite ... -
The optimal design of laminated plates for maximum buckling load using finite element and analytical methods.
(1994)In the first part of the study, finite element solutions are presented for the optimal design of symmetrically laminated rectangular plates subject to a combination of simply supported, clamped and free boundary conditions. ... -
High temperature fatigue crack growth behaviour of TIMETAL 21S in an oxidizing environment.
(1995)The high temperature fatigue crack growth behaviour of the newly developed, metastable titanium-based alloy, TIMETAL 21S, was investigated in an inert and an oxidizing environment. The investigation adopted a two pronged ... -
Computational and analytical modelling of composite structures based on exact and higher order theories.
(1995)The objective of the present study is the computational and analytical modelling of a stress and strain state of the composite laminated structures. The exact three dimensional solution is derived for laminated anisotropic ... -
Investigation into on-line optimization of cutting tool geometry.
(1996)Metal cutting is an important process used to manufacture components with machined surfaces or holes. Due to the wide usage o f this manufacturing process, research with the aim to optimize the cutting processes is ... -
Finite element and analytical solutions for the optimal design of laminated composites.
(1996)The present study involves the analysis and design optimisation of composite structures using analytical and numerical methods. Five different problems are considered. The first problem considers the design of laminated ... -
The effect of tip clearance and tip gap geometry on the performance of a one and a half stage axial gas turbine.
(1996)In a previous work of a similar nature, the performance of a low speed axial turbine with a second stage nozzle was examined with respect to the effect of the variation of tip clearance for various tip shapes. Present ... -
The influence of sulphidizing attack on the mechanism of failure of coated superalloy under cyclic loading conditions.
(1998)A systematic study of the effect of sulphidizing atmosphere on the High Temperature Low Cycle Fatigue (HTLCF) properties of coated and uncoated unidirectionally solidified MARM002 nickel base superalloy was performed at ... -
Non-stationary responses on hoisting cables with slowly varying length.
(1999)Cables in hoisting installations, due to their flexibility, are susceptible to vibrations. A common arrangement in industrial hoisting systems comprises a driving winder drum, a steel wire cable, a sheave mounted in headgear, ... -
Optimisation of the process parameters of the resin film infusion process.
(1999)The resin film infusion process or RFI is a vacuum assisted moulding method for producing high quality fibre reinforced components. The goals of this research have been to investigate this new process, with the aim of ... -
A mechanistic evaluation and design of tunnel support systems for deep level South African mines.
(1999)The design of support systems, comprising rock bolt reinforcement and fabric containment components for tunnels in deep level mining environments does not currently cater well for adverse rock mass conditions. This often ... -
Cordless linear synchronous motor material handling system for computer integrated manufacturing.
(2000)Advanced material handling systems' impact on flexible manufacturing systems (FMS) have increased the efficiency and work rate over conventional manufacturing assemblies. The interaction of automated guided vehicles ... -
The influence of process factors on the production of semi solid feedstock.
(2000)Semi-solid manufacturing is a near net shape forming process that takes advantage of an alloy's thixotropic behaviour. However, in order to obtain the desired thixotropic properties from an alloy in the semi -solid state, ... -
An investigation of the strength of an aircraft wing bolt with a centrally drilled hole.
(2000)The investigation contained herein is a part of a larger, long-term project: The Development of SMART Aircraft Bolts. Structural failures, at highly stressed components, arc common in some of the aircraft used by the ... -
A design methodology investigation and the design of a material handling system.
(2000)This dissertation is undertaken under the auspices of both the CSIR, Division of Mining Technology and the University of Natal, School of Mechanical Engineering. The CSIR have outlined two fundamental objectives of the ...