Transformative Designing of Structural Materials Based on Lightweight Metallic Cellular-Solids Composed of Tachi-Miura Polyhedron

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18750
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 18:Mechanics of materials, production engineering, design engineering, and related fields
• Research Institution: Kanazawa University
• Principal Investigator: KUNIMINE Takahiro 金沢大学, 機械工学系, 准教授 (90612705)
• Co-Investigator(Kenkyū-buntansha): 安田 博実 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 助教 (10910903)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: セル構造体 / 構造材料 / 軽量化 / 衝撃吸収 / 折紙構造 / 積層造形技術 / 構造制御 / 機械的性質

Outline of Final Research Achievements

In this study, a 3D design based on the origami structure called Tachi-Miura polyhedron (TMP) was applied to metallic cellular structures. Fabrication of geometrically controlled cellular structures was carried out using additive manufacturing technology as an attempt to reasonably control weight reduction and conflicting strength, which could not be achieved with conventional metallic cellular structures. Young's modulus, compressive strength, displacement, impact energy absorption performance, relative density, etc. can be precisely controlled by changing various geometrical parameters of the TMP multi-cell structures. In these models, it was found that there was a parameter region in which the compressive strength was able to be reasonably controlled to some extent with weight reduction, which was not possible with conventional cellular structures.

Free Research Field

材料工学

Academic Significance and Societal Importance of the Research Achievements

本研究では積層造形技術を駆使し，「紙」を使ったアートの側面が強い折紙構造を金属セル構造体のデザインに導入することで，構造材料の軽量化と強度の合理的な制御の実現に挑む内容であり，アート，構造・材料力学，製造技術を融合させた新規セル構造体設計という既存の学術の体系や方向を大きく変革・転換させる潜在性を大いに有している。また新規軽量構造材料による環境負荷の低い産業製品への実用にも大きな可能性を秘めている。