Dragana Jandric
Ansys Employee

Hi! To add to the above answer, the strains filter out the rigid body modes from displacement. E.g. if all points in the body move 3m in the same direction, the displacement of all the points is 3 m, but the strain at all points is 0 because the shape or size of the body does not change (it simply translates to another location).

Hope this is helpful!