Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Wire-Woven Kagome Transformed to have a Negative Poisson's Ratio

음의 푸아송비를 갖도록 변환된 와이어 직조 Kagome

  • Kang, Dae Seung (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Han, Seung Chul (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Park, Jong Woo (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Nguyen, Dang Ban (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Kang, Kiju (School of Mechanical Engineering, Chonnam Nat'l Univ.)
  • 강대승 (전남대학교 기계공학부) ;
  • 한승철 (전남대학교 기계공학부) ;
  • 박종우 (전남대학교 기계공학부) ;
  • ;
  • 강기주 (전남대학교 기계공학부)
  • Received : 2016.03.30
  • Accepted : 2016.07.11
  • Published : 2016.09.01
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Abstract

Wire-woven Kagome is a kind of Periodic Cellular Metal, which is known to have high strength, stiffness for its weight, and potential for mass production. In this work, we developed a new structure that mimics ${\alpha}$-cristobalite. First, an ordinary wire-woven Kagome was fabricated using metallic wires, and the tetrahedral cells were then filled with metal balls and epoxy. The wire-woven Kagome was transformed to have a negative Poisson's ratio by carrying out a specified amount of initial deformation. The fabrication possibility and kinematic behavior were checked by using FEA simulation. Finally, the mechanical properties were measured using compressive tests.

와이어 직조 Kagome는 와이어로 직조된 Periodic Cellular Metal의 일종으로서 Kagome 구조로 이루어져 있다. 와이어 직조 Kagome는 무게 대비 높은 강도와 강성을 가지면서 대량 생산에도 큰 가능성을 가지는 것으로 알려졌다. 본 연구에서는 ${\alpha}$-cristobalite 구조적 특성을 모사하여 음의 푸아송비를 갖는 새로운 직조 구조체를 개발하였다. 와이어 직조 Kagome를 제작한 후 사면체 단위셀 부분을 강구와Epoxy를 이용하여 채우고, 초기 변형을 주어 시편을 제작하였다. 또한 FEA 시뮬레이션을 통해 제작 가능성을 확인하고, 실제 제작한 구조체를 대상으로 기계적 특성을 연구하였다.

Keywords

References

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