Search for dissertations about: "necking"
Showing result 1 - 5 of 29 swedish dissertations containing the word necking.
-
1. Vibration-induced muscle injury in the hand - experimental and clinical studies
Abstract : Exposure to vibration is known to cause vasospastic white fingers and/or sensorineural symtoms such as numbness and tingling in fingers and/or musculoskeletal disorders such as reduction in muscle force, fatigue and reduced endurance. Classifications for the vasospastic and sensorineural symptoms are established. READ MORE
-
2. Simulation of dynamic instabilities during high rate deformation of ductile bars and plates
Abstract : In this thesis, some of the phenomena occurring in plates and cylindrical bars subjected to dynamic loading are investigated. Numerical simulations using a dynamic finite element code are performed for a number of different sized specimens with various initial surface imperfections. Typically imposed loading velocities are in the range 10m/s.. READ MORE
-
3. Dynamic neck formation in elastic-plastic tensile bars
Abstract : The time development of neck formation in ductile elastic-plastic bars is analyzed numerically in order to obtain a qualitative description of the features of dynamic neck localization under impact conditions. The full time history is visualized using contour plots of the time development of a strain rate parameter. READ MORE
-
4. Mechanics and Failure in Thin Material Layers : Towards Realistic Package Opening Simulations
Abstract : The final goal of this PhD-work is an efficient and user-friendly finite element modelling strategy targeting an industrial available package opening application. In order to reach this goal, different experimental mechanical and fracture mechanical tests were continuously refined to characterize the studied materials. READ MORE
-
5. Ductile failure and rupture mechanisms in combined tension and shear
Abstract : This licentiate thesis is generally concerned with the ductile failure and rupture mechanisms encountered under combined tension and torsion loading. In the first part entitled Paper A, an experimental investigation of the rupture mechanisms in a mid-strength and a high strength steel was conducted employing a novel test configuration. READ MORE