Figure 2
From: Resilin microjoints: a smart design strategy to avoid failure in dragonfly wings
(A–C) Representative screenshots of the deformation pattern of (A) Model 1 subjected to a force on the dorsal side of the cross vein, (B) Model 1 subjected to a force on the ventral side of the cross vein, and (C) Model 2 subjected to a force on the dorsal side of the cross vein, indicating the considerably larger deformation of Model 1, compared to Model 2. The distribution of the elastic strain energy density is shown in the deformed shapes of the models. In Model 1, the strain energy density is concentrated in the contact zone of the veins, suggesting the role of the resilin patch in the deformability of the joint. (D,E) Representative screenshots of the deformation pattern of (D) Model 1 and (E) Model 2 subjected to a displacement applied to the ventral side of the cross vein. The figure shows the rotation of the cross vein about the axis of the longitudinal vein in Model 1, but the bending of the cross vein in Model 2. The distribution of the maximum principal stress within the models indicates a high stress concentration in Model 2 due to the removal of the resilin patch and the soft cuticle. lv, longitudinal vein; cv, cross vein; mm, membrane; rs, resilin; sp, spike; hc, hard cuticle; sc, soft cuticle; F, external force; D, applied displacement.
