Abstract
When a rigid plane compresses a rubber block containing an array of holes, the adjacent holes collapse in orthogonal directions, depending on the compression level. To demonstrate the buckling tunability to the contact interface, we examined how the flexible hinge size between holes affects the contact responses by finite element analysis. We found that the apparent friction coefficient can drastically decrease with increased compression levels due to the local buckling, while a rubber block without holes maintains a constant friction coefficient. This tunability is reflected in the contact area decreasing at the compression level, changing the contact pressure profile. We also found that there exists a flexible hinge size to minimize the apparent friction coefficient. Our findings offer the possibility of designing tunable contact interfaces.
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