I am performing a displacement-controlled compression test on a square block, where the top of the block is attached to a fixed plate, and the bottom of the block is attached to a movable plate that moves up.
- How will the strain distribution look like in a block (is there any analytical expression for it)? Will it be uniform throughout, or will it be max/min at the center?
- Since it is displacement-controlled, will the strains be same irrespective of the material (e.g., steel vs rubber)? P.S. I know the stress-strain curve will look different - I want to know if the the strain distribution would look same for different materials at a particular displacement.