Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Evaluation of Tensile Characteristics of Cementitious Composites Reinforced by Auxetic Mesh

음의 포아송비 거동 격자체로 보강한 시멘트 복합체의 인장특성 평가

  • Kim, Won-Woo (Structural Engineering Research Institute, Korea Institute of Civil engineering and Building Technology) ;
  • Lee, Jang-Hwa (Structural Engineering Research Institute, Korea Institute of Civil engineering and Building Technology) ;
  • Moon, Jae-Heum (Structural Engineering Research Institute, Korea Institute of Civil engineering and Building Technology)
  • 김원우 (한국건설기술연구원 구조융합연구소) ;
  • 이장화 (한국건설기술연구원 구조융합연구소) ;
  • 문재흠 (한국건설기술연구원 구조융합연구소)
  • Received : 2017.06.08
  • Accepted : 2017.06.19
  • Published : 2017.06.30
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Abstract

Typical materials including concrete behaves with positive poisson's ratio when external force is applied. However, it is also available to manufacture a grating system which has negative poisson's ratio(Auxetic). In this study, double arrow type 2-D auxetic mesh was manufactured and mechanical behaviors were observed. Also, direct tensile tests of cementitious composites reinforced by auxetic mesh were performed and the results were compared with composites reinforced by typical mesh. The results showed that auxetic mesh more effectively restrained the deformation(shortening) of cementitious composites perpendicular to the load direction comparing with typical mesh.

콘크리트를 포함한 일반적인 재료는 외부 하중의 작용 시 양의 포아송비 거동을 가진다. 한편, 격자시스템에 있어서는 음의 포아송비 거동을 가지도록 제작할 수 있다. 이에 본 연구에서는 이중화살촉 형식의 2차원 음의 포아송비 격자체를 제작하여 역학적인 거동을 검토하였다. 또한 이러한 음의 포아송비 격자체로 보강한 시멘트 모르타르 복합체의 직접인장시험을 수행하였으며, 실험결과는 일반 격자체를 적용한 경우와 비교하였다. 연구 결과, 음의 포아송비 거동 격자체를 적용한 경우 복합체의 하중 직교방향의 변형을 구속하는 효과가 일반 격자체보다 더 효과적임을 보여주었다.

Keywords

References

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