Browsing Mechanical & Manufacturing Eng (Theses and Dissertations) by Title
Now showing items 77-96 of 211
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Development, modelling and characterization of metal micro-textured thermal interface materials
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2010)A metal micro-textured thermal interface material (MMT-TIM) has been developed to address the shortcomings of conventional TIMs. In the present study, the MMT-TEVIs consist of silver foils with raised, small-scale, hollow ... -
Directional Solidification Experiments with the Transparent Model Alloy Neopentyl Glycol-35wt.%(D)Camphor
(Trinity College Dublin. School of Engineering. Discipline of Mechanical & Manuf. Eng, 2021)This thesis describes the development of an experimental facility in combination with image processing and computer vision techniques for the visualisation and characterisation of dendritic growth structures in the transparent ... -
EHD augmentation of convective boiling within a transparent heat exchange
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2013)This work investigated the influence of electrohydrodynamic forces on the two-phase flow patterns of HFE7000 refrigerant under convective boiling conditions. A flow loop was constructed which featured two novel transparent ... -
Electroconductive Biomaterial Platforms: from Piezoresistive Sensors to Cardiac Tissue Engineering
(Trinity College Dublin. School of Engineering. Discipline of Mechanical & Manuf. Eng, 2022)New classes of functional materials and the rapid advances being made in manufacturing technologies are key requirements to drive the next step forward in healthcare. In recent decades, conjugated polymers have gained ... -
Empirical evaluation of electrochemical air pollution sensors
(Trinity College Dublin. School of Engineering. Discipline of Mechanical & Manuf. Eng, 2022)The objective of the research was to characterise the potential of state-of-the-art low cost gas air pollution sensors to measure air pollution levels in an active urban environment, through the implementation of a set of ... -
Engineering innate immunology in cardiovascular disease models and regenerative medicine
(Trinity College Dublin. School of Engineering. Discipline of Mechanical & Manuf. Eng, 2023)Heart failure is the leading cause of death worldwide with atherosclerosis and myocardial infarction remaining prominent causes. It is now widely accepted that the inflammatory response holds a key role in advancing both ... -
Engineering tissues with a zonal structure and composition mimicking native articular cartilage
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2015)Engineering cartilage grafts with comparable functionality to the native tissue remains a major challenge in the field of regenerative medicine. The overall goal of this thesis was to engineer a cartilage graft with ... -
Experimental investigations in turbomachinery noise-source identification
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2014)The exact contribution of each of the various core-noise sources within modern turboshaft engines to the noise radiated from the engine exhaust and into the surrounding environment is poorly understood. The objective of ... -
Experimental study of aeroacoustic noise production through combined flow measurements and array signal processing
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2013)The underlying processes behind sound generation in turbulent flows are still a source of debate. The investigation presented in this thesis focuses on the experimental approaches that aim to clarify this issue by estimating ... -
Failure mechanisms in bone - a mechanical and histological study
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2006)Repeated loading causes the development of microdamage in bone and may lead to failure by fatigue. Microdam age in the form of microcracks occurs naturally in bone due to the loads experienced during day-to-day activities, ... -
Failure of cemented hip implants under complex loading : experimental and numerical analysis
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2004)A new generation of experimental pre-clinical testing methods for cemented hip replacement femoral components have been proposed, and preliminarily validated by comparing a 'good' prosthesis design with a 'bad' prosthesis ... -
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 ... -
Finite element and experimental analysis of dented aircraft panels
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2005)Aircraft fuselage panels are susceptible to low velocity impact damage in the form of "dents" from a variety of in-service sources, such as cargo and service trucks, dropped tools during servicing, walking on "no-step ... -
Finite element and experimental analysis of the micro-form rolling process
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2007)The observations made during this research which, to the best knowledge of the author have not been previously mentioned in literature, were as follows: -- Loss of contact between the die and workpiece when rolling small ... -
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 ... -
Flow structures and heat transfer enhancement in the wakes of sliding bubbles
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2016)The motion of a bubble through a fluid has attracted considerable scientific attention for many years due to the complex, interesting fluid dynamics in their wakes, coupled to a rich and varied interface motion. Additionally, ... -
FPGA based solver for internet eigenvectors
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2010)Calculating an Internet Eigenvector for Internet ranking is a massive computational problem dominated by Sparse Matrix by Vector Multiplication (SMVM) where the matrix is very sparse, unsymmetrical and unstructured. The ... -
Fracture and fatigue in High Impact Polystyrene : the influence of secondary phase morphology (Rubber Particle Size and Effective Rubber Phase Volume) on fracture and fatigue behaviour in HIPS
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2004)The subject of the following thesis is the influence of the secondary phase morphology on fracture and fatigue behaviour in High Impact Polystyrene (HIPS). The motivation of the work was the premature failure of parts ... -
From "Bench to Bedside": In-Silico Modelling to Inform the Assessment of Intervertebral Disc Cell-Based Therapies
(Trinity College Dublin. School of Engineering. Discipline of Mechanical & Manuf. Eng, 2023)Lower back pain is a major global socio-economic concern, with the primary cause believed to be degeneration of the intervertebral disc (IVD). While the spine field is filled with a growing body of basic research and many ... -
Fundamental Insights into Arterial Remodelling; Strain-Mediated Degradation of Arterial Collagen
(Trinity College Dublin. School of Engineering. Discipline of Mechanical & Manuf. Eng, 2019)Maladaptive remodelling of structurally significant collagen fibres in the arterial wall is believed to play a critical role in the development and progression of degenerative arterial disease. A greater understanding of ...
