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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 84 for “"Contact Pressure"”.
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CONTACT PRESSURE MEASUREMENT
… techniques do not indicate the actual gasket pressure in the interfaces of the joint. An extensive literature survey was carried out to identify suitable sensing material that could be configured into a miniature sensor to be inserted between the two interfaces of bolted joints for the purpose …
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Contact Pressure Distribution Optimization
A novel design technique that is used to optimize contact pressure distribution was introduced and investigated. The primary objective of this design tool, called the Predicted Displacement Method, was to provide a calculated contact surface shape alteration of a contact body that induces a uniform …
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Zinc pot bearing material wear rate as a function of contact pressure and velocity
… zinc-pot bearing materials as a function of contact pressure and velocity. A small laboratory size-testing machine was developed for this purpose. This machine measures the wear of bearing material samples, submerged in a cup of zinc, in the form of a 1-inch diameter ball rotating against a …
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Development of a Human Tibiofemoral Joint Finite Element Model to Investigate the Effects of Obesity and Knee Malalignment on Joint Contact Pressure
… (OA). Excess body weight generates greater joint contact forces at the knee; however, obese individuals alter their gait to decrease joint contact forces. Knee malalignment has been identified as a strong mediating factor between obesity and knee OA progression. Excess body weight acting on a …
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Subject-Specific Finite Element Predictions of Knee Cartilage Pressure and Investigation of Cartilage Material Models
… loads, stresses and strains, and joint contact area and pressure. Abnormal cartilage contact pressure is considered a risk factor for incidence and progression of OA. For this study, three subject-specific tibiofemoral knee FE models containing accurate geometry were developed from …
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Experimental investigations and finite element analyses of interface heat partition in a friction brake system. New modelling paradigm for describing friction brake systems to support studies of interface temperature, contact pressure, heat flux distribution and heat partition ratio by experiment and FE simulation
… the effect on disc/pad interface temperature and pressure distributions of limited relaxations of this rotational restriction. Models are proposed, developed and validated that facilitate different rotational degrees of freedom (DoF) of the pad. An important influencing factor in friction brake …
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A hybrid haptic stimulation prosthetic wearable device to recover the missing sensation of the upper limb amputees
… system that is capable in sensing the contact pressure, the surface texture, and the temperature, simultaneously, was designed for a prosthetic hand to provide a tactile sensation to amputation patients. In addition, the haptic system was developed to enable the prosthetic’s users to …
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Structural health monitoring of bolted joints using thermal contact resistance and ultrasonic signals
… include using ultrasonic signals and thermal contact resistance metrics correlated to contact pressure to assess the joints integrity. Moreover, contact pressure distribution at the joint surface was examined using pressure sensitive films. Experimental measurements showed that there were …
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Finite element analysis of total knee replacement considering gait cycle load and malalignment
… different performance on movement and contact pressure distribution in the tibio-femoral contact surfaces. More contact areas were found in the mobilebearing implant than in the fixed-bearing implant, but the maximum contact pressures were almost the same in both. The thickness of the …
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Response of grooved composite laminates to out-of-plane contact loading via numerical models
… of grooved composite laminates to out-of-plane contact loading is examined using numerical modeling through the consideration of contact pressure and stresses within the laminate, with particular focus on the area local to the groove. Finite element analysis is employed via ABAQUS, a commercial …
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Multi-scale scratching in chemical-mechanical polishing
… thesis presents scratching models by analytical contact mechanics, finite element analysis, and statistical methods. First, scratching due to hard, abrasive particles was modeled and expressions for the maximum and minimum scratch width and depth were determined. Second, scratching of a hard …
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A study of mechanical behaviour of the double-row tapered ring bearing for the main shaft of a direct-drive wind turbine
… have been proposed for calculating the contact force and pressure distribution of double-row TRBs. Nevertheless, most of the existing studies failed to consider angular misalignment between the inner and outer rings as well as the friction force between the rollers and raceways. A …
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Modelling and simulation of themo-mechanical phenomena at the friction interface of a disc brake.An empirically-based finite element model for the fundamental investigation of factors that influence the interface thermal resistance at the friction interface of a high energy sliding pair in a disc brake.
… and thermal conductivity. The interface real contact area was also an important parameter in this investigation, and it has been found to affect heat partitioning by adding its own thermal resistance. A 2-dimensional (2D) coupled-temperature displacement Finite Element (FE) model is presented, …
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Pole tip recession in linear tape systems
… may be achieved in future systems. Water vapour pressure or Normalized Water Content (NWC) rather than the Relative Humidity (RH) values (as are used almost universally in this field) determined the extent of PTR and stain (if produced) in linear heads. Approximately linear dependencies were …
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Evaluation of image receptor angulation during mediolateral oblique positioning for optimised pressure and area distribution in mammography
… angle of IR during MLO positioning for optimised pressure and area distribution; this in turn may help reduce pain and discomfort associated with the procedure.MethodThe experimental work described in this report is in two phases. Phase one was an anthropomorphic phantom study to establish a …
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A comprehensive analytical model for pneumatic tires
… model is composed of two parts--modeling of the contact mechanism and determination of the tire forces/moments. A static circular beam model is introduced for the contact mechanism, in which a tire is modeled with three compliance components--6-DOF spring/damper elements for the sidewall and the …
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