It is shown that the mode indices and weight factors of superposed LG modes, as well as the reference choice, affect the position where the circular edge dislocation takes place, and result in the vortex disappearance or the appearance .

A method of object-oriented computer simulation for the motion pictures and the stress field of edge dislocation;

Atomistic simulation of the relaxed structure and energy of edge dislocation in metal Ta;

Computer simulation for the stress field of edge dislocation;

Molecular dynamics simulations(MD) are used to investigate dynamic process of an edge-dislocation dipole in gliding face(011) with Burgers vector b=± in bcc single-crystal iron.

Combining MAEAM with MD simulation method,both the relaxed structure and strain energy of an a[100] edge dislocation in metal Mo have been simulated systematically in atomic scales.

The interfacial energy of γ/ α interphase boundaries in the undeformde austenite and deformed austenite, the envir onment sensitive embedding energies (E ESE) of C, N and microalloyin g elements Nb , Ti or V (in the form of air mass) in the area of edge dislocation in austenite wer.

The atomic structure model of 1/2 edge dislocation in ferrite phase of steel or iron was set up with computation programmed.