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

The Korean Society of Mechanical Engineers (대한기계학회)
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Image-Based Computational Modeling of Porous Matrix Composites and Calculation of Poroelastic Coefficients

다공성 기지를 갖는 복합재의 이미지 기반 전산 모형화 및 기공 탄성 계수 산출

  • Kim, Sung Jun (Dept. of Aerospace Engineering, Chonbuk Nat'l Univ.) ;
  • Shin, Eui Sup (Dept. of Aerospace Engineering, Chonbuk Nat'l Univ.)
  • 김성준 (전북대학교 항공우주공학과) ;
  • 신의섭 (전북대학교 항공우주공학과)
  • Received : 2013.11.29
  • Accepted : 2014.03.08
  • Published : 2014.05.01
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Abstract

Poroelastic analyses of fiber-reinforced composites were performed using image-based computational models. The section image of a porous matrix was analyzed in order to investigate the porosity, number of pores, and distribution of pores. The resolution, location, and size of the section image were considered to quantify the effective elastic modulus, poroelastic parameter, and strain energy density using the image-based computational models. The poroelastic parameter was calculated from the effective elastic modulus and pore pressure-induced strain. In addition, the results of the poroelastic analyses were verified through representative volume elements by simplifying various pore configurations and arrangements.

본 논문에서는 이미지 기반 전산 모형을 이용하여 섬유강화 복합재료의 기공 탄성 해석을 수행하였다. 먼저 다공성 기지에 대한 단면 이미지를 분석하여 기공도, 기공 개수, 기공 분포 등을 확인하였다. 이미지의 해상도, 위치, 크기에 따른 전산 모형화 및 유한요소 해석을 수행하였으며, 주요 결과로써 유효 탄성 계수, 기공 탄성 인자, 변형 에너지 밀도를 정량적으로 산출하였다. 기공 탄성 인자는 유효 탄성 계수와 기공 압력에 의한 팽창 변형도를 기준으로 계산하였다. 또한 이미지 기반 전산 모형을 이용한 기공 탄성 해석 결과의 신뢰성 확인을 위해, 기공의 형상 및 배열을 단순화시킨 대표 체적 요소 모형의 해석 결과와 비교하였다.

Keywords

References

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