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Proceedings of CAD'15, 2015, 254-258
Method for Evaluating Mechanical Characteristics of Biological Material for Bio-inspired Lightweight Design

Satsuki Tsunenari, Tetsuo Oya, Keio University

Abstract. With increasing concern about cost reduction and environmental destruction, lightweight structural design is essential in the product design process. Lightweight design enables products to be made with the minimum amount of materials and their transport at a lower cost. Nowadays engineers can use structural and topological optimization to yield lightweight structures. Although these methods have been implemented in commercial software, there are some practical restrictions on design variables and conditions. For example, it is difficult to obtain the optimal shape and topology while simultaneously considering the anisotropy of materials. On the other hand there are many efficient and lightweight structures in nature that partially utilize material anisotropy. In this paper, an exoskeleton of the American lobster (Homarus americanus) have been adopted as a biological model of such structures and attempted to learn the mechanism of their lightweight design. Bio-inspired design, also known as biomimetic design has emerged as a new solution to engineering problems these days. Through their evolution, creatures have acquired efficient structures for their survival and propagation. Such efficient structures in nature have been analyzed and exploited to solve a variety of engineering problems.

Keywords. Bio-inspired design, Lightweight design, 3D printing, FEM simulation

DOI: 10.14733/cadconfP.2015.254-258