Finite element simulation of dislocation field movement

  • Paweł Dłużewski Institute of Fundamental Technological Research Polish Academy of Sciences
  • Horacio Antuúnez Institute of Fundamental Technological Research Polish Academy of Sciences

Abstract

The problem of dislocation motion in monocrystals is faced in the framework of the continuum theory of dislocations. The presented approach is based on the defects balance law. A constitutive model is formulated which relates the driving forces with the dislocation velocity. The model makes use of the relations between the plastic deformation tensor and the tensor of dislocation density. Given a crystal under certain boundary and initial conditions, the evolution of both dislocation field and elastic-plastic deformations is obtained by solving the coupled system of equations resulting from the equilibrium equation and the dislocation balance for each time step. The set of equations is discretized by the finite element method. As an example the movement of an edge dislocation field inducing shear band deformation in a monocrystal is considered.

Keywords

References

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Published
Jul 18, 2023
How to Cite
DŁUŻEWSKI, Paweł; ANTUÚNEZ, Horacio. Finite element simulation of dislocation field movement. Computer Assisted Methods in Engineering and Science, [S.l.], v. 2, n. 2, p. 141-148, july 2023. ISSN 2956-5839. Available at: <https://cames.ippt.pan.pl/index.php/cames/article/view/1482>. Date accessed: 14 nov. 2024.
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Articles