A deformable device has an extended state, a flattened state, and a rolled state if a beam, where a stiffness and strength of the deformable beam or hinge in the extended state is greater than a different stiffness and strength of the deformable beam or hinge in the flattened state. An end face cross section includes a main C curved member which defines an about circular shape of an arc ranging between about a quarter arc and a substantially full circle. A periodic C curved member defines at least two about C shaped curves. The periodic C curved member has a first periodic C curved member end mechanically coupled to the first main C curved member end, and a second periodic C curved member end mechanically coupled to the second main C curved member end. A deformable device with a V shaped member is also described.