Bioinspired suture structures: design and optimization

Sutures are a prominent feature in a wide range of species compared to other biological structures. They have independently evolved within diverse biological systems to optimise their specific function. The geometry, complexity, and interlocking features of sutures vary depending on their purpose in different species. An interesting suture interface was recently discovered in the diabolical ironclad beetle (Phloeodes diabolicus), which withstands a maximum force equivalent to 39,000 times its own body weight and survives being run over by a car. This ellipse-shaped interlocking suture provides excellent bending moment resistance, leading to a tough exoskeleton.This research investigates the influence of suture module size, suture component positioning angle, and the inclusion of a soft suture interface on different loading conditions. The main objective of this thesis is to provide structural design guidelines for the suture interface suitable for various loading conditions and to determine the optimal design parameters necessary to achieve the best possible mechanical properties.