3 papers
cond-mat.soft2026
Topological antiqued mechanical toy
Hirofumi Wada, Hayato Mizobata, Shuto Ueno +1
{\it Jacob's ladder} -- a classic children's toy -- is a simple mechanical frame comprising rigid blocks connected by strings that shows curious unidirectional flipping waves. None…
cond-mat.soft2026
Wrinkles, rucks, and folds formed in a heavy sheet on a frictional surface
Keisuke Yoshida, Hirofumi Wada
Soft elastic sheets resting on rigid surfaces develop wrinkles, rucks, and folds due to the combined influence of elasticity, gravity, and contact interactions. Despite their ubiqu…
cond-mat.soft2026
Indentation of an elastic arch on a frictional substrate: Pinning, unfolding and snapping
Keisuke Yoshida, Hirofumi Wada
We investigate the morphology and mechanics of a naturally curved elastic arch loaded at its center and frictionally supported at both ends on a flat, rigid substrate. Through syst…