Fig. 1 | Applied Physics A

Fig. 1

From: Spiky-joint: a bioinspired solution to combine mobility and support

Fig. 1

From problem statement to a bioinspired design. a A rigid conventional splint [5]. b A common compressive wrist support that interrupts the normal wrist function. c A common compressive wrist support that does not provide enough protection against injuries. d The wing of a dragonfly as the source of inspiration [27]. e A scanning electron microscope (SEM) image showing the distribution of vein joints in a part of the wing. f A SEM image of a vein joint on the wing with a spike that restricts joint mobility by an interlocking effect. g A perspective view of our bioinspired splint with the spikes and revolute joints. h A top view of our splint that shows the mobile and immobile parts. i Application of our 3D-printed splint on the wrist showing the splint in the interlocking position. j Mechanical testing set-up of the splints at the initial and final positions. k Force–displacement curves of the splints, showing the load-bearing capacity before and after interlocking with an illustration of the splints on human wrist in the representative mobile and support modes. Each colour represents data from a different specimen

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