Global ETD Search
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 14 of 14 for “"Friction Surface"”.
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The Influence of Occupational Footwear on Slip Responses
… where individuals walked over a sheet of high friction aluminum foil. On the sixth trial and without the participant’s knowledge, the aluminum foil was replaced with a low friction hard plastic surface to induce an unexpected slip. The remaining six trials were conducted over the low friction …
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Derivation of an Evolution Equation for Two-Dimensional Waves on Thin Films
… on thin liquid films subjected to gravity, fluid friction, surface tension, and Marangoni effects. The physical configuration is a thin liquid layer on a planar incline. Following previous studies, the Marangoni effect is incorporated by a constant surface tension gradient and yields a non-convex …
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ADVANCED PHOSPHORUS BASED MIGRATION RESISTANT ANTI-OXIDANTS FOR CARBON-CARBON COMPOSITE AIRCRAFT BRAKES WITH INCREASED CATALYTIC OXIDATION RESISTANCE
… steel brakes, and they attain strength and frictional properties at temperatures up to 1600°C. C/C composite brakes can endure high temperatures, but in the presence of oxygen they will begin to oxidize at 400°C. Anti-oxidant systems must be applied to the non-rubbing surfaces of the C/C …
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7-DOF Robotic Arm XY-Plane Translational Stability
… effects of an arm operating on a simulated zero-friction surface and provide a method to anticipate and stabilize these induced forces. By calculating the forces generated by the movement of a 7-DOF Sawyer robotic arm using the arm’s Universal Robotics Description Format (URDF) parameters …
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Development and analysis of active rear axle steering for 8x8 combat vehicle
… in between 20 km/h and 80 km/h over low friction (μ =0.35) and high friction (μ=0.85) surfaces. The rollover prevention capabilities of the controllers are evaluated using a fishhook maneuver over a high friction surface and damping of external disturbances will be tested using a …
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Finite Element Analysis of a Shaft-Rotor System
… comprised of two rotor lamina, with a Coulomb friction surface interaction, and held together by a compressive axial force. These models represent a first step towards understanding the behavior of the entire rotor stack.
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Identification of barriers and least cost paths for autonomous vehicle navigation using airborne LIDAR data
… paths minimize the sum of impedance across a surface. Impedance can be measured by steepness of slope, impenetrable barriers such as vegetation and buildings, fence lines and streams, or other factors deemed important to the vehicle's success at navigating the terrain. This research aims to …
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Development of timber concrete composite (TCC) beam with post-tensioning
… more efficient in use due to the high contact friction surface area for long coupling nut. The bending tests of post-tensioned beams show the range of bending strength capacity increasing 12 % to 46 %. There were three types of failure is tensile, compression and splitting shear failure …
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Evaluation of International Friction Index and High-Friction Surfaces
… have an obligation to provide users with optimal surface conditions under various weather conditions throughout the year. A satisfactory pavement surface should exhibit good friction and texture depth to reduce roadway highway accidents. This is why friction is starting to receive increased …
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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
… of the pad. An important influencing factor in friction brake performance is the development of an interface tribo-layer (ITL). It is reasonable to assume that allowing limited rotational motion of the pad will impact the development of the ITL (e.g. due to different friction force …
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Mesoscale and stormscale ingredients of tornadic supercells producing long-track tornadoes in the 2011 Alabama super outbreak
… focuses on investigating the importance of surface moisture fluxes on influencing storm morphology. Three experimental simulations modifying various surface conditions were conducted, altering friction, surface fluxes and longwave radiation emission. Inflow soundings from these storms also …
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DESIGN AND OPTIMIZATION OF LOW-Cu AND Cu-FREE AUTOMOTIVE BRAKE FRICTION MATERIALS
… for formulating low-Cu and Cu-free brake friction materials without using and releasing hazardous materials that are listed on Washington State and California State Senate Bills. Model brake material samples were manufactured and tested in the Friction Assessment and Screening Test (FAST) …
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Structure of 2-D and 3-D Turbulent Boundary Layers with Sparsely Distributed Roughness Elements
… (Reynolds stresses and triple products), skin friction, surface pressure and oil flow visualizations in 2-D and 3-D rough-wall flows for Reynolds numbers, based on momentum thickness, greater than 7000. Very uniform circular cylindrical roughness elements of 0.38mm, 0.76mm and 1.52mm height (k) …
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Development of Electromagnetic Friction Dampers for Improving Seismic Performance of Civil Structures
… to extreme natural events such as earthquakes. Friction is one of the most reliable mechanisms of energy dissipation that has been utilized extensively in friction dampers to improve seismic performance of civil structures. Friction dampers are well-known for having a highly nonlinear hysteretic …