Fig. 6: Mechanical characterization of the structure.
From: Rotating square tessellations enabled stretchable and adaptive curved display
a Representative unit (consisting of four islands as a group) and the free-body diagram of a rotating island. Inset: photo of an island in a structure subject to stretch. b Calculated dimensionless force \(f\) as a function of the angle of rotation \(\varphi\) (small deformation). c Relationship between the dimensionless force \(f\) and the square island’s rotated angle \(\varphi\) (large deformation). d Photo of a TPU model clamped for mechanical tests. e Photo of the model when fully stretched. f Relation between the lateral strain and the axial strain, showing both experimental and theoretical results. g Measured dimensionless force-strain curve, in comparison with various theoretical and numerical predictions.
