Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Strengthening Mechanism of Hybrid Short Fiber/Particle Reinforced Metal Matrix Composites

섬유/입자 혼합 금속복합재료의 강화기구 해석

  • Published : 2000.02.01
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Abstract

This paper presents an analytical method considering tensile strength enhancement in hybrid $Al_2O_3$ fiber/particle/aluminum composites(MMCs). The tensile strength and elastic modulus of the hybrid MMCs are even 20% higher than those of the fiber reinforced MMCs with same volume fraction of reinforcements. This phenomenon is explained by the cluster model which is newly proposed in this research, and the strengthening mechanisms by a cluster is analyzed using simple modified rule of mixtures. From the analysis, it is observed that cluster structure in hybrid MMCs increase the fiber efficiency factor for the tensile strength and the orientation factor for the elastic modulus. The present theory is then compared with experimental results which was performed using squeeze infiltrated hybrid MMCs made of hybrid $Al_2O_3$ short fiber/particle preform and AC8A alloy as base metal, and the agreement is found to be satisfactory.

본 연구는 섬유/입자 혼합금속복합재료의 강화기구를 분석하는 이론적 해석방법을 제시하였다. 혼합금속복합재료의 인장강도 및 탄성계수는 같은 보강재의 부피분율 가진 단섬유복합재료에 비해서 강도가 최대 20%까지 증가한다. 이러한 증가효과는 본 연구에서 새로이 제안된 클러스터 모델을 도입한 후 이에 따른 강화효과를 Modified Rule of Mixture을 적용하여 분석하였다. 해석결과 클러터구조는 인장강도에 대해서 섬유의 효율을 탄성계수에 대해서는 배향인자를 증가시키는 것으로 나타났다. 이론적 해석 결과는 $Al_2O_3$섬유/입자 예비성형체에 AC8A를 침투시켜 제조한 금속복합재료에 대한 실험결과와 비교되었으며 이를 통해 해석이론이 타당함을 확인하였다.

Keywords

References

  1. Poly. Compos. v.8 Mechanical properties of particulate filled polymers Bigg, D.M.
  2. Composites v.15 Effect of nulceation, filler anisotropy and orientation on the properties of PP composites Pukanszky, B.;Rockenbauer, A.;Maurer, F.H.J.
  3. Polym. Compos. v.10 Fracture of ultrafine calcium carbonate/polypropy-lene composites Levita, G.;Marchetti, A.;Lazzeri, A.
  4. J. Mater. Sci. v.17 Thermal expansion of particulate reinforced composites Feltham, S.J.;Yates, B.
  5. Applied Science Polymer Engineering Composites Richardson, M.O.W.
  6. Fiber Sci. Tech. v.18 Failure processes in particulate filled polypropylene Friedrich, K.;Karsch, U.A.
  7. J. Appl. Polym. Sci. v.28 Tensile properties of CaCO₃-filled polyethylenes Chacko, V.P.;Farris, R.J.;Karasz, F.E.
  8. Composites v.29A Characterization of tensile behavior of hybrid short glass fiber/calcite particle/ABS composites Fu, S.Y.;Lauke, B.
  9. Compos. Sci. Tech. v.56 Effects of fiber length and fiber orientation distributions on the tensile strength of short-fiber-reinforced polymers Fu, S.Y.;Lauke, B.
  10. J. Compos. Mater v.28 no.7 Short fiber polymer composites: a fracture-based theory of fiber reinforcement Piggott, M.R.
  11. J. Mech. Phys. Solids v.22 Toughness in obliquely-stressed fibrous composites Piggott, M.R.
  12. Influence of fiber length, fiber orientation and interfacial adhesion on poly(butylene terephthalate)/polyethylene alloys reinforced with short glass fibers v.15 Joshi, M.;Maiti, S.N.;Karasz, A.
  13. Polym. Compo. v.10 Some studies on glass fiber reinforced polypropylene. Part Ⅱ: mechanical properties and their dependence on fiber length, interfacial adhesion and fiber dispersion Gupta, V.B.;Mittal, R.K.;Sharma, P.K.
  14. J. Compos. Mater v.11.3 no.2 Effective stiffness of radomly oriented fiber composites Christensen, R.M.;Waals, F.M.
  15. Acta metall. mater. v.42 no.4 The influence of particle distribution on the mechanical response of a particulate metal matrix composite Corbin, S.F.;Wilkinson, D.S.
  16. British J. Applied Phys. v.3 The elasticity and strength of paper and other fibrous materials Cox, H.L.
  17. J. Mater. Sci. v.31 Correction to the Fukuda-Kawata Young's modulus theory and the Fukuda-Chou strength theory for short fiber-reinforced composite materials Jayaraman, K.;Kortschot, M. T.
  18. Load-Bearing Fiber Composites Piggott, M.R.