Search for dissertations about: "spring characteristic"

Showing result 1 - 5 of 8 swedish dissertations containing the words spring characteristic.

2. 1. Torque and Angle Controlled Tightening of Bolted Joints

   Author : Göran Toth; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; torque controlled tightening; deformation parameters; momentary elongation; deformation factor; torque; Bolted screwed joints; spring characteristic; Torx; torque and angle controlled tightening; hexalobular; final torque; snug torque; Taylor’s series expansions; preload; plastic deformation; permanent elongation; yield; friction diameter; plastic spring constant; clevis; turn-of-nut method; bearing surface pressure; twisting; Monte-Carlo simulations;

   Abstract : Reduced weight and fuel consumption, improved reliability and engine performance are the main requirements in the automotive industry of today. These requirements demand robust and optimized bolted joints, where a high amount of preload obtained by effective utilisation of the bolt is essential. READ MORE

4. 2. Moisture Influence on Structural Behaviour of Pavements : Field and Laboratory Investigations

   Author : Farhad Salour; Sigurdur Erlingsson; Guy Doré; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Falling Weight Deflectometer FWD ; backcalculation; unbound material; subgrade; seasonal variation; moisture content; spring-thaw; drainage; pavement stiffness; field test; pavement instrumentation; resilient modulus; permanent deformation; repeated load triaxial test; unsaturated soil; matric suction.; Civil and Architectural Engineering; Byggvetenskap; Transportvetenskap; Transport Science;

   Abstract : The structural behaviour of pavements in cold regions can considerably be affected by seasonal variation in environmental factors such as temperature and moisture content. Along with the destructive effect of heavy traffic loads, climatic and environmental factors can considerably contribute to pavement deterioration. READ MORE

5. 3. Dynamics of Polymer Adsorption onto Solid Surfaces in Good Solvent

   Author : Niklas Källrot; Fysikalisk kemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Adsorption dynamics of various types of uncharged homopolymers onto solid surfaces in good solvent have been studied by using a coarse grained bead-spring model. Brownian dynamics simulation has been used to examine the adsorption process for polymers released near an adsorbing surface, and Monte Carlo simulations have been employed to explore equilibrium properties of adsorbed polymers. READ MORE

6. 4. Women on sick leave for long-term musculoskeletal pain : Factors associated with work ability, well-being and return to work

   Author : Mamunur Rashid; Annika Nilsson; Marja-Leena Kristofferzon; Marina Heiden; Katja Boersma; Högskolan i Gävle; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biopsychosocial model; musculoskeletal pain; postal survey; prognostic factors; return to work; sick leave; women of working age; work ability and well-being; inget Strategiskt forskningsområde SFO ; no Strategic Research Area SFO ;

   Abstract : Background: Taking sick leave (SL) for long-term musculoskeletal pain (MSP), predominantly in the neck, shoulders and back, is common among women in Sweden. Long-term MSP affects their daily life and causes impaired work ability and long-term SL. READ MORE

7. 5. Ice, wood and rocks : regulating elements in riverine ecosystems

   Author : Johanna Engström; Christer Nilsson; Roland Jansson; James Helfield; Tenna Riis; Umeå universitet; []
   Keywords : riparian zone; timber floating; river restoration; cut-off side channels; hydrochory; large wood; anchor ice; fish;

   Abstract : Riparian ecosystems are of great importance in the landscape, connecting landscape elements longitudinally and laterally and often encompassing sharp environmental gradients in ecological processes and communities. They are influenced by fluvial disturbances such as flooding, erosion and sediment deposition, which create dynamic and spatially heterogeneous habitats that support a high diversity of species. READ MORE