5 Dislocation at 45 degrees

From here you may load this preset , see the text of the next , or return to the preset list.

A dislocation has been inserted at 45 degrees with respect to the crystal axes. It is clearly neither screw nor edge. Run, and then stop when the ends of the line reach the midpoints of the sides of the display. The dislocation line is now curved. What kind of dislocation is it at the top boundary? At the side? In between?

Continue to run until the dislocation is lost. Remembering that there is energy per unit length associated with the line, explain the behavior you've just seen. Why does the dislocation move even though there is no stress applied?

Reload the preset, run and see if you can stop the motion of the dislocation, or move it back and forth, by moving the handle of the shear stress slider.