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

The Korean Society of Mechanical Engineers (대한기계학회)
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Mechanical Behaviors under Compression in Wire-woven Bulk Kagome Truss PCMs (II) - Effects of Geometric and Material Imperfections -

벌크형 와이어직조 카고메 트러스 PCM의 압축거동 (II) - 결함의 영향 -

  • 현상일 (경북대학교 공과대학 기계공학부) ;
  • 최지은 (전남대학교 자동차연구소) ;
  • 강기주 (전남대학교 기계시스템 공학부)
  • Published : 2007.07.01
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Abstract

A newly developed cellular metal based on kagome lattice is an ideal candidate for multifunctional materials achieving various optimal properties. Intensive efforts have been devoted to develop efficient techniques for mass production due to its wide potential applications. Since a variety of imperfections would be inevitably included in the realistic fabrication processes, it is highly important to examine the correlation between the imperfections and material strengths. Previous performance tests were mostly done by numerical simulations such as finite element method (FEM), but only for perfect structures without any imperfection. In this paper, we developed an efficient numerical framework using nonlinear random network analysis (RNA) to verify how the statistical imperfections (geometrical and material property) contribute to the performance of general truss structures. The numerical results for kagome truss structures are compared with experimental measurements on 3-layerd WBK (wire-woven bulk kagome). The mechanical strength of the kagome structures is shown relatively stable with the Gaussian types of imperfections.

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References

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