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Design and Additive Manufacturing of Octahedron Unit Cell-Based Lattice Structures and Investigation of Their Mechanical Behavior

Monjezi, Hamid Reza | 2025

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 58536 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Asghari, Mohsen; Mohammadi, Keyvan
  7. Abstract:
  8. Strut-based lattice structures have outstanding performance in load-bearing and energy absorption, and have attracted significant attention in various industries, including aerospace, medical, and automotive. With advancements in additive manufacturing methods, the use of these structures has become more attractive and practical. This study examines the deformation patterns and mechanical properties of hybrid-layered lattice structures based on the octahedron unit cell. One of the main objectives of this research is to create structures composed of different cells with suitable compatibility in a layered arrangement. Twelve different structures, including uniform and hybrid configurations of unit cells designed in this study, have been fabricated using the vat photopolymerization method. The behavior of each of these twelve structures under quasi-static compressive loading has been experimentally investigated. The results show that the hybrid-layered design has a significant impact on the mechanical properties of these lattice structures. All the structures studied had a relative density below 0.1, which is a range that has received particular attention from researchers. Furthermore, among all the structures examined, including a strut aligned parallel to the compressive loading direction showed the best performance in energy absorption. Additionally, the findings of this study could be significant and inspiring for the fabrication and design of lattice structures at various scales
  9. Keywords:
  10. Additive Manufacturing ; Octahedron Unit Cell ; Hybrid Design ; Strut-Based Lattice Structures

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