Because in this way , the both ends rotate about its center (Which is changing during the pure bending process) with a angular velocity.
What do you mean of " constant moving rate " explicitly? IF use " fix move rotate " command , You have to appoint a rotation axis goes thru a point,which is not easy to determine in bending .
After consideration, INDEED , Ramp the velocities is wrong because it gave a incorrect initial velocity distribution, MAYBE I should write a code to change the velocities in datefiles after equilibrated
Because in this way , the both ends rotate about its center (Which is
changing during the pure bending process) with a angular velocity.
Yes, but with ramp the velocity changes. A bending test should not have
changing velocities.
What do you mean of " constant moving rate " explicitly? IF use " fix
move rotate " command , You have to appoint a rotation axis goes thru a
point,which is not easy to determine in bending .
Why not? If the length of the rod stays the same then the center stays the
same.