A finite-element based nodal dislocation dynamics model was developed in order to simulate the structures and strengths of dislocation junctions in face-centered cubic crystals. The model was based upon anisotropic elasticity theory, together with the explicit inclusion of a separation of perfect dislocations into partial dislocations that bounded a stacking fault. It was demonstrated that the model reproduced, in precise detail, the structure of a Lomer-Cottrell lock which had already been deduced from atomistic simulations. In view of this success, the strength of the junctions was also examined. This resulted in a stress-strength diagram which consisted of the locus of points, in stress space, that corresponded to dissolution of the junction.

Mesoscopic Analysis of Structure and Strength of Dislocation Junctions in FCC Metals. V.B.Shenoy, R.V.Kukta, R.Phillips: Physical Review Letters, 2000, 84[7], 1491-4