Microarchitectural Design Variation of the Echinoid Skeleton: A 3D Structural and Mechanical Study of Paracentrotud lividusi

作     者：Perricone, Valentina Cesarano, Pasquale Deb, Mainak Lublin, Derek Mutalipassi, Mirko Pappalardo, Lucia Kisailus, David Marmo, Francesco 

作者机构：Department of Materials Science and Engineering University of California Irvine United States Department of Structures for Engineering and Architecture University of Naples Federico II Italy Materials and Manufacturing Technology Program University of California Irvine United States Department of Integrative Marine Ecology Stazione Zoologica Anton Dohrn Villa Comunale Napoli Italy  Palermo Italy  Italy Wipro Technologies 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Finite element method 

摘      要：Biological materials usually show remarkable mechanical properties, despite being composed of fragile and simple components (i.e., strong but brittle minerals and tough but weak proteins). These properties are conferred through a multiscale design, in which shapes, structures and composition are coherently organized leading to unique emerging strategies. Noteworthy is the case of the sea urchin skeleton, a hierarchical tasseled structure composed of multiple calcitic plates that are both lightweight and load-bearing. At the microscale, each plate shows a unique species-specific pattern consisting of a porous 3D lattice-like meshwork of trabeculae, called stereom. Interestingly, the stereom architecture is extremely complex and variable in different basic types, each one characterized by a unique topology and structural behaviors. In this context, the present study provides an in-depth analysis of the microarchitectural variability in the sea urchin Paracentrotus lividus. Accordingly, micro-CT scans, image analysis, 3D modeling, and linear elastic FE-Analysis were conducted to provide new insights about the topological and geometrical variability of the different stereom types, and their region-specific mechanical behavior calculated for tensile and shear loading. These results are of value to ameliorate the understanding of the mechanical function of the stereom variability, as well as to identify adaptive solutions useful for future biomimetic transfer applications. © 2024, The Authors. All rights reserved.