A better understanding of a recently raised argument on whether there occur
s a structure change during yielding has been acquired by using molecular s
imulation. That is, when monitoring the displacements of all atoms before a
nd after the yield, a structure transition does occur, which is the "atomic
jump" that coordinates the amount of the atoms in the polymer and makes a
large step beyond similar to0.05 nm for all those atoms. Results indicate t
hat the complex of polymer chain packing induces the multiple atomic jumps
around the yield point. This explains why polymers have a broader yielding
peak.