Abstract
Inspired by mechanics of epidermis cell walls in the forming process of the unique smooth shape of a leaf, the constitutive model of an out-of-plane compressive sandwich panel consisting of outer skins and a biomimetic Isosceles Trapezoid Corrugated Lattice Cellular (bio-ITCLC) core is built by theory and experiment to provide guidance for meeting structural requirements of a skin with the self-adaptation multi-morphing application. This above constitutive model shows that by decreasing the skin’s tangential stiffness and simultaneously increasing the bio-ITCLC core’s vertical stiffness can use less weight to decouple the mutual suppression between high tangential and low normal deformations of the skin. Besides, one proposed optimal design for a self-adaptation multi-morphing skin is that the skin comprising of a flexible matrix modified by curvilinear fibres is supported by the bio-ITCLC core with self-adjusting anisotropy stiffness according to new circumstances. And this dynamic self-adjusting anisotropy stiffness follows such a rule that the transverse stiffness along the y-axis or vertical stiffness along the z-axis is increased while the transverse stiffness along the x-axis is decreased.
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