Search for dissertations about: "Dynamic Fracture Mechanics"

Showing result 1 - 5 of 21 swedish dissertations containing the words Dynamic Fracture Mechanics.

  1. 1. Simulation of dynamic instabilities during high rate deformation of ductile bars and plates

    University dissertation from Division of Mechanics, Lund University

    Author : Kristina Nilsson; Lunds universitet.; Lund University.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; numerical simulation; non-linear; wave propagation; multiple necking; necking; buckling; fracture; Mechanical engineering; Maskinteknik; finite elements; cohesive elements; dynamic; J2-flow theory; J2-deformation theory; viscoplastic; background inertia;

    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

  2. 2. Non-Linear Vibration and Dynamic Fracture Mechanics of Bridge Cables

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Armando Leon; Blekinge Tekniska Högskola.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cable Vibrations; Non-Linear Vibration; Dynamic Fracture Mechanics; Cable-Stayed Bridges; Dynamic Stress Intensity Factor;

    Abstract : In the present work, the non-linear vibrations and the corresponding dynamic fracture mechanics of cables of cable-stayed bridges are studied. The cables are among the most critical components in cable-stayed bridges and there are different damage sources such as corrosion, vibration, fatigue and fretting fatigue that can significantly affect them, thereby reducing the cable’s service life and even producing their failure. READ MORE

  3. 3. Experiments and modelling of fracture initiation at impact

    University dissertation from Avd för Hållfasthetslära, Box 118, 221 00 Lund

    Author : Ola Wall; Lunds universitet.; Lund University.; [2000]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration and acoustic engineering; vacuum technology; hydraulics; Viscoplasticity; Mechanical engineering; Ductile; Brittle; Dynamic; Fracture; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; Material technology; Materiallära; materialteknik;

    Abstract : Popular Abstract in Swedish Denna avhandling behandlar olika frågor som var och en är av stor betydelse för förståelsen av dynamiska brott i stål. Särskilt betonas sprickpropageringsförsök, utförda i överslagsområdet mellan segt och sprött beteende, samt de slutsatser som kan dras av försöken. READ MORE

  4. 4. Modeling of fracture and damage in rubber under dynamic and quasi-static conditions

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Elsiddig Elmukashfi; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solid Mechanics; Hållfasthetslära;

    Abstract : Elastomers are important engineering materials that have contributed to the different technical developments and applications since the 19th century. The study of crack growth mechanics for elastomers is of great importance to produce reliable products and therefore costly failures can be prevented. READ MORE

  5. 5. Modeling of cast iron materials related to machining

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Goran Ljustina; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machining simulation; Microstructure; Fracture; Johnson Cook plasticity;

    Abstract : A microstructure level simulation model of cast iron machining based on micrograph image analysis has been developed. The simulation tool has been developed for theorthogonal machining process involving 2D representations of a range of cast iron microstructures. READ MORE