Hi everyone, I want to press the PDMS pillar to a flat substrate. The process is like microcontact printing. It was observed that when the pillar contacts the substrate, there is some deformation at the interface between the pillar and substrate.
So I want to ask, at the same axial compressive displacement, will the retention of shape or size at the interface be impacted by the cross-section shape of the pillar?
The pillar has three kinds of cross-section shapes such as circle, square, and triangle. I am wondering whether there is a shape that is easier to keep its shape and size at the interface.
As shown in Figure 1, I guess that the circle has more advantages to keep being a circle. Whereas the square and triangle will deform at the corner. Am I correct?
And which one will change less than the others when it comes to the interface's area if I assume that the three shapes' original areas are the same?
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