Impact fracture behavior on particle volume fraction of nano silica composite materials

입자 함유율의 변화에 따른 나노 실리카 복합재료의 충격파괴거동

  • LEE, Jung-Kyu (Department of Control and Mechanical Engineering, Graduate School, Pukyong National University) ;
  • KOH, Sung Wi (Department of Mechanical System Engineering, Pukyong National University)
  • 이정규 (부경대학교 대학원 제어기계공학과) ;
  • 고성위 (부경대학교 기계시스템공학과)
  • Received : 2015.08.13
  • Accepted : 2015.08.31
  • Published : 2015.08.31


The present study is undertaken to evaluate the effect of volume fraction on the results of Charpy impact test for the rubber matrix filled with nano sized silica particles composites. The Charpy impact tests are conducted in the temperature range $0^{\circ}C$ and $-10^{\circ}C$. The range of volume fraction of silica particles tested are between 11% to 25%. The critical energy release rate $G_{IC}$ of the rubber matrix composites filled with nano sized silica particles is affected by silica volume fraction and it is shown that the value of $G_{IC}$ decreases as volume fraction increases. In regions close to the initial crack tip, fracture processes such as matrix deformation, silica particle debonding and delamination, and/or pull out between particles and matrix which is ascertained by SEM photographs of Charpy impact fracture surfaces.


particle volume fraction;impact test;energy release rate;fracture analysis;nano composites


Supported by : 부경대학교


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