Search for dissertations about: "dislocation"

Showing result 11 - 15 of 206 swedish dissertations containing the word dislocation.

  2. 11. Constitutive models based on dislocation density : formulation and implementation into finite element codes

    Author : Konstantin Domkin; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Abstract : Correct description of the material behaviour is an extra challenge in simulation of the materials processing and manufacturing processes such as metal forming. Material models must account for varying strain, strain rate and temperature, and changing microstructure. READ MORE

  4. 12. Numerical Modeling of Plasticity in FCC Crystalline Materials Using Discrete Dislocation Dynamics

    Author : Arash Hosseinzadeh Delandar; Pavel Korzhavyi; Rolf Sandström; Mikko Alava; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dislocations; crystal plasticity; discrete dislocation dynamics; Cu single crystal; high strain rate deformation; strain rate sensitivity; plastic anisotropy; slip band formation; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : Plasticity in crystalline solids is controlled by the microscopic line defects known as “dislocations”. Decisive role of dislocations in crystal plasticity in addition to fundamentals of plastic deformation are presented in the current thesis work. READ MORE

  5. 13. Modelling of Dislocation Bias in FCC Materials

    Author : Zhongwen Chang; Pär Olsson; Christophe Domain; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Irradiation induced void swelling is problematic for the application of austenitic steels under high dose irradiation. In this thesis, the swelling is characterized by dislocation bias. The dislocation bias is obtained using the finite element method, accounting for fcc copper and nickel under electron irradiation. READ MORE

  6. 14. Biomechanical studies of congenital dislocation of the hip : experiments in human autopsy specimens and rabbits

    Author : Stefan Asplund; Uppsala universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : .... READ MORE

  7. 15. Multiresolution Continuum Theory and Dislocation Density Based Constitutive Relations

    Author : Hao Qin; Kenneth Runesson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik; Centrumbildning - Centrum för högpresterande stål CHS ; Centre - Centre for High Performance Steel CHS ;

    Abstract : In classical description, the mechanical state of a material point depends on the variables defined at this point solely. It can integrate and catch some aspects of the material’s microstructure by conventional homogenization method. READ MORE