Fig. 3.

Other varieties of compliant rolling-contact architected materials (CRAMs). Shape morphing can be achieved using a peanut-shaped cams, b elliptical cams, and c square-shaped cams. d Shearing motions can be achieved by combining rectangular and circular cams. e Example parts can be fabricated to assemble f strings of CRJs that can be used to enable three-dimensional (3D) CRAMs. g A cube-shaped polyhedron of these strings could h tangle into many shapes. i, j Another 3D design that can k, l shear in tangential directions and exhibit m, n an auxetic behavior that stiffens those shearing directions