Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Microscopic Investigation on the Micro-Deformation of Draped Helmet Structure Made of fabric Composite

직물 복합재료를 이용한 드레이핑 헬멧의 미소 변형 관찰

  • 장승한 (중앙대학교 기계공학부)
  • Published : 2003.08.01
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Abstract

In this paper. various tow parameters such as equivalent tow thickness, amplitude of longitudinal tow and tow intervals were investigated and compared with each other by using microscopic observation to find out the exact deformation patterns between both directions of the fabric structure(Longitudinal and Transverse Directions). And those observation results were compared with bias extension. biaxial tests results with dry fabric which has the same tow structure as the draped helmet materials and also compared with prepreg specimen which is cured by autoclave moulding without vacuum and pressure condition. Specimens for the observation were taken from draped helmet which is made of fabric composite(Five Harness Satin Weave). From the observation results, it was found that there are different deformation pattern between tow directions and effect of geometric condition on the deformation of the fabric materials during draping process was verified.

본 논문에서는 직물 복합재료의 제조된 드레이핑 헬맷의 등가 토우 두께, 종방향 토우의 진폭, 토우 간격 등의 여러 가지 토우 파라메터들을 관찰하고, 현미경 관찰을 통해 직물 복합재료 구조의 각 방향에 따른 미세 변형을 서로 비교하였다. 또한 이러한 관찰 결과들을 동일한 토우 구조를 가지는 견직물 시편을 이용한 일방향 편향 인장실험, 이축 인장실험 결과와 비교하였으며, 오토클레이브에서 경화된 여러 가지 선형 조건을 가진 시편들과도 비교하였다. 직물 복합재료(새틴 직물 복합재료)로 제작된 드레이핑 힐멧으로부터 현미경 관찰 시편을 얻었으며, 각 시편의 종방향과 횡방향에 대해 각각 관찰하였다 관찰 결과로 부터, 토우 방향에 따른 서로 다른 변형 패턴을 확인할 수 있었으며 드레이핑 공정 중 금형의 기하학적 조건이 직물 복합재료의 변형에 미치는 영향을 확인하였다.

Keywords

References

  1. Composite A v.31 Experimental studies and analysis of the draping of woven fabrics Mohammed,U.;Lekakou,C.;Bader,M.G. https://doi.org/10.1016/S1359-835X(00)00080-4
  2. Composite A v.33 Modeling formability of multiaxial warp knitted fabrics on a hemisphere Hu,J.;Jiang,Y. https://doi.org/10.1016/S1359-835X(02)00008-8
  3. Composite A v.32 Comprehensive drape modelling for moulding 3D textile performs Prtluri,P.;Sharma,S.B.;Ramgulam,R. https://doi.org/10.1016/S1359-835X(01)00040-9
  4. Composite A v.30 The drape of woven fabric performs and prepregs for production of polymer composite components Wang,J.;Paton,R.;Page,J.R. https://doi.org/10.1016/S1359-835X(98)00187-0
  5. Composite A v.33 Beyond the Pin-Jointed net maximising the deformability of aligned continuous fibre reinforcements Potter,K. https://doi.org/10.1016/S1359-835X(02)00014-3
  6. Proceedings of the thirteenth international conference on composite materials, ICCM-13, Bejing, China Draping of woven composites over irregular surface Sharma,S.B.;Sutcliffe,M.P.F.
  7. Proceedings of the fourth international ESAFORM conference on materials forming v.1 Experimental investigation of two deformation during draping of woven fabrics Sharma,S.B.;Sutcliffe,M.P.F.;Clifford,M.J.;Long,A.C.;A.M.Habraken(ed.)
  8. Composites Science and Technology v.62 Microscopic investigation of tow deformation of dry fabrics during draping Chang,S.H.;Sharma,S.B.;Sutcliie,M.P.F.
  9. Advanced strength and applied elasticity(3rd edition) Ugural,A.C.;Fenster,S.K.