Browsing Mechanical, Manufacturing & Biomedical Eng by Date of Publication
Now showing items 1-20 of 881
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Time domain calculation of noise generated by a propeller in a flow
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 1997)In this thesis, the problem of calcultaing the noise from an acoustically subsonic aircraft propeller is approached using a "moving medium" method. An established theory of noise generation by rigid bodies in motion is ... -
Identification of a non-linear model for fluidelastic instability in a normal triangular tube array
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 1999) -
Anomaly detection in drilling using neural networks
(1999)With increasing competitive pressures, manuf acturing systems in the automotive industry are being driven more and more aggressively. The pressures imposed on the processes and lack of system 'slack' have led to ... -
Computer approaches to total hip replacement evaluation just prior to operation
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 1999)The surgical operation of total hip replacement (THR) is, after 30 years, regarded as a successful medical procedure. The average life of an artificial hip has, however, remained at about 15 years for more than a decade, ... -
Prediciton of fatigue failure in engineering components using the finite element method
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)Prediction of fatigue failure in engineering artefects is becoming increasingly important as we enter the third millennium; more catastrophic fatigue failures will occur as engineers push the limits of design even further ... -
A study of the role of oil additives in the failure of ball bearings
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)This thesis examines the influence that extreme pressure oil additives have in the failure of ball bearings. Additives are commonly used in lubricating oils to improve their properties. In recent years some sections of ... -
Rear impact inflicted temporomandibular joint injuries
(Taylor and Francis, 2000)Indirect injuries to the jaw can lead to a range of painful symptoms with serious consequences. These injuries are confirmed by clinical evidence but the injury mechanism is not understood. This work is an investigation ... -
Thermal aspects of the grinding process
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)Grinding is a commonly used process for material removal. It has been used for a long time mainly as a finishing process, although this situation is changing, with the development of creep feed grinding, and high efficiency ... -
An experimental and numerical investigation into the machining of Inconel 718 using coated cemented carbide cutting tools
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)The nickel-base superalloy Inconel 718, a tough material capable of maintaining its strength at high temperatures and resisting corrosion in various environments, can be classified as a "difficult to machine" material. Yet ... -
Modeling of the forces in grinding from grinding wheel topography
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)As the world becomes more industrialized and competition for fast, high quality production increases, the need to obtain faster manufacturing processes, while simultaneously increasing product quality, becomes increasingly ... -
An asperity deformation model for the sliding cylinder problem : theoretical and experimental investigations
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)Statistical analysis shows that the main reason for the failure of machines is not breakage but wear of the moving parts resulting from rubbing stress. Although the laws of friction are fairly well substantiated, there are ... -
Temporomandibular joint injuries during whiplash
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)Whiplash injuries occur due to differential accelerations in the human body. Neck injuries are predominant, but a considerable body of clinical evidence suggesting a close relationship between whiplash and temporomandibular ... -
Finite element simulation of a metal forming process & die design
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)Thread Rolling (also known as roll threading) is a cold forming process for producing threads or other helical or annular forms on a fastener. This is achieved by rolling the surface profile of hardened steel dies onto the ... -
Design and development of a pre-clinical test for cemented femoral hip replacements
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)Current state of the art testing methods do not allow implant performance to be assessed relative to known failure modes, prior to clinical use. Even clinically, it can take up to 5 years before implant performance can be ... -
Simulation of tissue differentation during fracture healing
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2001)Fracture healing is a complex biological process during which, repair of the damaged tissues occurs so efficiently that the initial strength and anatomy of the bone are restored. Mechanical loading is believed to greatly ... -
Microcracks and the fatigue behaviour of compact bone
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2001)Microcracking in bone acts as a stimulus for bone remodelling, contributes to the loss of bone quality in osteoporosis and is thought to play a major role in both fragility and stress fractures. This study seeks to refine ... -
Microphone array techniques for aeroacoustics
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2001)The capacity for source localisation and measurement in aeroacoustics can be enhanced through the use of a microphone array. Although arrays have been used in a variety of applications, there are a number of problems ... -
Finite element analysis & Die profile optimisation for a cold forging process
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2001)Throughout the world, almost every machine that moves requires the use of bolts in one form or another. Bolts, or Fasteners, are made in bolt making machines by a process of cold forming. At a particular stage in the bolt ... -
Mechanics applied to skeletal ontogeny and phylogeny
(Springer, 2002)The musculo-skeletal system serves the mechanical function of creating motion and transmitting loads. It is made up mainly of four components: bone, cartilage, muscle and fibrous connective tissue. These have evolved over ... -
Aspects of the fatigue behaviour of acrylic bone cement
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2002)Polymethylmethacrylate bone cement is used to fixate many orthopaedic implants. However, it is a brittle material, prone to damage accumulation leading to cement cracking and prosthesis loosening. The damage accumulation ...
