Solution of axisymmetric crack problems using distributed dislocation ring dipoles

Formation of dislocation dipoles in irradiated graphite

Recently, we have proposed a dislocation dipole accumulation model to explain the irradiation-induced amorphization of graphite. However, the structure of dislocation dipole in the hexagonal networks is still an open question at the atomic-level. In this paper, we propose a possible formation process of the dislocation dipole. © 2001 Elsevier Science. All rights reserved

Analysis of asymmetric broadening of X-ray diffraction peak profiles caused by randomly distributed polarized dislocation dipoles and dislocation walls

Author(s) of this paper may load this reprint on their own web site provided that this cover page is retained. Republication of this article or its storage in electronic databases or the like is not permitted without prior permission in writing from the IUCr. The problem of asymmetric X-ray diffraction peak broadening caused by dislocations is investigated. The leading term responsible for the ...

Numerical Solution of Cohesive Crack Problems through Optimization Methods

1. Abstract We propose a novel approach for the analysis of cohesive crack propagation in elastic media. Unlike all existing methods that move from continuous displacement formulations that are properly enriched to handle the discontinuity, see e.g. the extended finite element method (XFEM) or the embedded discontinuity approaches, inherently discontinuous displacements and H(div,Ω) stresses in...

An Axisymmetric Finite Volume Formulation for the Solution of Heat Conduction Problems Using Unstructured Meshes

In this work, a finite volume formulation developed for two-dimensional models is extended to deal with axisymmetric models of heat conduction applications. This formulation uses a vertex centered finite volume method and it was implemented using an edge-based data structure. The time and domain discretization using triangular meshes is described in details, including the treatment of boundary ...

Homogenization of a Row of Dislocation Dipoles from Discrete Dislocation Dynamics