Proceedings of the Korean Society For Composite Materials Conference (한국복합재료학회:학술대회논문집)

The Korean Society for Composite Materials (한국복합재료학회)
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Prediction of Permeability for Multi-axial Braided Preform by Using CVFEM

검사체적 유한요소법을 이용한 다축 브레이드 프리폼의 투과율 계수 예측

  • Y. S. Song (School of Materials Science and Engineering, Seoul National University) ;
  • K. Chung (School of Materials Science and Engineering, Seoul National Universit) ;
  • T. J. Kang (School of Materials Science and Engineering, Seoul National Universit) ;
  • J. R. Youn (School of Materials Science and Engineering, Seoul National University)
  • Published : 2002.10.01
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Abstract

Prediction of 3-D permeability tensor for multi-axial preform is critical to model and design the manufacturing process of composites by considering resin flow through the multi-axial fiber structure. In this study, the in-plane and transverse permeabilities for braided preform are predicted numerically. The flow analyses are calculated by using 3-D CVFEM(control volume finite element method) for macro-unit cells. To avoid checker-board pressure field and improve the efficiency of numerical computation, a new interpolation function for velocity is proposed on the basis of analytic solutions. Permeability of a braided preform is measured through unidirectional flow experiment and compared with the permeability calculated numerically. Unlike other studies, the current study is based on more realistic unit cell and prediction of permeability is improved.

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