Browsing Mechanical, Manufacturing & Biomedical Eng by Date of Publication
Now showing items 41-60 of 881
-
The cellular transducer in damage-stimulated bone remodelling
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2004)People with osteoporosis, osteopenia or weight baring joint replacement, due to an altered loading configuration, are more susceptible to microdamage accumulation than normal human beings as are athletes who undertake ... -
Adaptation of growing bone to altered mechanical load : morphological change, structural strength and gene expression
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2004)Osteoporosis, a condition characterised by a loss of bone mass, is of increasing clinical interest in an aging population. Bone formation and growth are controlled by genetic, hormonal and biomechanical factors. This ... -
Control of Grinding Temperature by High Speed Air Jets
(Bled, 2004)Grinding, like other abrasive processes, may generate high local temperatures along the arc of cut. These can cause various forms of surface damage in the most sensitive finishing phase of the manufacturing cycle. Traditional ... -
Effect of a degraded core on the mechanical behaviour of tissue-engineered cartilage constructs: a poro-elastic finite element analysis
(Springer, 2004)The structure and functionality of tissue-engineered cartilage is determined by the tissue culture conditions and mechanical conditioning during growth. The quality of tissue-engineered cartilage can be evaluated using ... -
Biomechanical origins of osteoporosis
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2004)The contention of this thesis is that a pathological change in bone tissue material properties during osteoporosis ahers the mechanical stimuli to bone remodelling cells and drives them to adapt the trabecular architecture ... -
Three-dimensional vortex particle-in-cell technique
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2004) -
Mechano-regulation of stem cell differentiation and tissue regeneration in osteochondral defects
(Elsevier, 2005)Cartilage defects that penetrate the subchondral bone can undergo spontaneous repair through the formation of a fibrous or cartilaginous tissue mediated primarily by mesenchymal stem cells from the bone marrow. This ... -
Investigating the load, friction and sealability characteristics of graphite valve packings
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2005)It is widely accepted that valve stem leakage accounts for the majority of fugitive emissions from petrochemical and chemical sites often accounting for over 50% of fugitive emissions from these sites. The most common valve ... -
Use of concealed pressure pins to determinate contact stresses in ring compression
(2005)new flexible experimental technique is introduced where a tool base that incorporates sensitive pressure pins is used. An industrial - tool that contains the forging geometry can be placed on top of the ... -
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 ... -
Mechanobiological models of Skeletal Tissue Differentiation
(Polish Academy of Sciences, 2005)Mechanical forces may act within tissues at the cellular level to regulate biological processes, a field of study that has been termed mechanobiology. The aim of computational mechanobiology is to derive sets of equations ... -
Vehicle pedestrian collisions: Validated models for pedestrian Impact and Projection
(Sage, 2005)The most important factor in pedestrian injuries from vehicle collisions is the impact velocity. In cases where the impact configuration can be ascertained, the most common method now used to determine vehicle speed ... -
Bone tissue material properties are altered during osteoporosis
(Hylonome, 2005)Measurement of the effects of osteoporosis on the mechanical behavior of bone has been performed using whole bone testing, or testing of volumes of ovariectomized cancellous bone1-3 and these studies revealed a decrease ... -
An experimental and 3D finite element analysis of a form rolling process
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2005)This thesis investigates a cold forming process called Form Rolling. Form Rolling is an innovative method of producing near-net shape parts, which is being implemented in particular by fastener manufacturers. In this study, ... -
A Comparison of Coherence Based Acoustic Source Identification Techniques
(2005)Four techniques of source identification are examined and the performance of each evaluated with experimental data. The procedures are all frequency domain methods and depend to some extent on the coherence function. The ... -
A new Approach for experimental evaluation of contact stresses
(2005)n metal forming operations, t he intensity and distribution o f stresses at the tool/material interface have great influence on the pattern and mode of deformation. This is due to the effect ... -
A comparison of strain and fluid shear stress in stimulating bone cell responses - a computational and experimental study
(2005)Bone undergoes continuous remodeling in response to mechanical loading. However, the underlying mechanisms by which bone cells respond to their changing mechanical environment, that is, strain in the load-bearing matrix ... -
Under surface pressure sensing technique for the evaluation of contact stresses
(2005)In metal forming operations, the intensity and distribution of stresses at the tool/material interface have great influence on the pattern and mode of deformation. This is due to the effect of frictional forces, being ...