Mechano-Responsive Lateral Buckling of Miniaturized Beams Standing on Flexible Polymer Substrate

An elastomeric beam standing on a flexible substrate was fabricated using 3D printing and soft lithography, then lateral buckling generated in the part of the wall when this beam is under pure bending is investigated. It is also observed changes in the morphology of wrinkling along the applied strain and geometry of the wall, and analyzed in scaling concepts. Furthermore, the degree of lateral buckling is controlled through the tip design in the ratchet structure and it is verified with finite element simulation. Here, geometric and material nonlinearity due to large deformation of rubber-like polymer is considered. Furthermore, instability mode at the edge of the wall is also discussed.