4.4 Article

Topology Optimization of Lightweight Lattice Structural Composites Inspired by Cuttlefish Bone

Journal

APPLIED COMPOSITE MATERIALS
Volume 26, Issue 1, Pages 15-27

Publisher

SPRINGER
DOI: 10.1007/s10443-018-9680-6

Keywords

Lightweight lattice structure; Discontinuous fiber reinforced polymer composites; Topology optimization; Cuttlefish bone

Funding

  1. Composite and Nanocomposite Advanced Manufacturing Center (CNAM) [SA1800366]
  2. South Dakota governor's center
  3. Department of Mechanical Engineering at South Dakota State University

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Lattice structural composites are of great interest to various industries where lightweight multifunctionality is important, especially aerospace. However, strong coupling among the composition, microstructure, porous topology, and fabrication of such materials impedes conventional trial-and-error experimental development. In this work, a discontinuous carbon fiber reinforced polymer matrix composite was adopted for structural design. A reliable and robust design approach for developing lightweight multifunctional lattice structural composites was proposed, inspired by biomimetics and based on topology optimization. Three-dimensional periodic lattice blocks were initially designed, inspired by the cuttlefish bone microstructure. The topologies of the three-dimensional periodic blocks were further optimized by computer modeling, and the mechanical properties of the topology optimized lightweight lattice structures were characterized by computer modeling. The lattice structures with optimal performance were identified.

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