Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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An Experimental Study on the Absorbed Energy of Polymeric Foam According to Different Mass and Impact Velocity Based on the Constant Impact Energy

동일 에너지 조건하에 충격체 질량과 속도변화에 따른 발포 고분자의 흡수 에너지에 관한 실험적 연구

  • 김병준 (국립공주대학교 기계공학과) ;
  • 김한국 (국립공주대학교 기계공학과) ;
  • 전성식 (국립공주대학교 기계공학과)
  • Received : 2013.06.27
  • Accepted : 2014.04.02
  • Published : 2014.04.30
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Abstract

In the present study, impact tests were carried out to investigate the crashworthy behaviour of the expanded polypropylene under the constant incident energy (100 J and 200 J) with five different combinations of striker mass and velocity. Also, preliminary quasi-static test was performed to obtain basic characteristics of the expanded polypropylene. MTS 858 and Instron dynatup 9250 HV were used for the quasi-static test and impact tests, respectively. In consequence, it was found that the impact energy absorption characteristics of the expanded polypropylene was more influenced by the striker mass instead of the velocity of the striker.

본 연구에서는, 발포 폴리프로필렌의 충격에너지 흡수특성이 충격체 질량과 속도중 어느 변수에 더 많은 영향을 받는 지 고찰해 보기 위하여, 충격체 질량과 속도에 변화를 주어 5개의 조합을 만들고, 이 조합들이 동일한 초기 충격에너지 조건(100 J 및 200 J)이 될 수 있도록, 값을 선정한 뒤, 충격시험을 수행하여, 충격에너지 흡수특성을 실험적으로 규명하였다. 또한 발포 폴리프로필렌의 기본적인 특성을 파악하기 위하여, 준정적 시험(Quasistatic test)도 수행되었다. 준정적 시험은 MTS 858을 이용하였고, 충격시험을 위해, Instron dynatup 9250 HV가 사용되었다. 충격시험결과, 발포 폴리프로필렌은 충격체 속도에 비해 질량에 더 많은 영향을 받는 것으로 나타났다.

Keywords

References

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