  Compressed cylindrical shells are common in our daily life, such as the
diamond shape in rolled-up sleeves, crumpled aluminum cans, and retreated
package of now defunct drinking straws. The kind of deformation is formally
called the Yoshimura pattern. However, there are many other equally prevalent
modes of deformation, depending on the relative size of radius between the
shell and its inner core, the thickness and rigidity and plasticity of the
shell, etc. To elucidate the phase diagram for these modes, we combine
molecular dynamics simulations and experiments to study the energetic,
mechanical, and morphological responses of a compressed cylindrical shell with
a hard core.
