Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Experimental Study for the Impact Characteristics of Expanded EPP/EPS Foams

발포 EPP/EPS의 충격특성에 관한 실험적 연구

  • 김한국 (국립 공주대학교 기계공학과) ;
  • 김병준 (국립 공주대학교 기계공학과) ;
  • 정광영 (국립 공주대학교 기계공학과) ;
  • 전성식 (국립 공주대학교 기계공학과)
  • Received : 2013.06.27
  • Accepted : 2013.12.22
  • Published : 2013.12.31
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Abstract

In the present study, quasi-static tests and impact tests were performed for investigating the mechanical behaviour of EPP (Expanded polypropylene) and EPS (Expanded polystyrene). Four different density cylindrical type specimens were prepared for EPP and EPS and 0.001 $s^{-1}$ and 0.1 $s^{-1}$ of strain rate conditions for quasi-static tests and 100 J, 200 J and 300 J of incident energy conditions for the instrumented impact tests were considered.

본 연구에서는 발포 폴리프로필렌(Expanded polypropylene)과 발포 폴리스티렌(Expanded polystyrene)의 준정적 시험(Quasi-static test) 및 계장화 충격 시험(Instrumented impact test)을 수행하였다. EPP와 EPS는 4가지의 다른 밀도에 대해 원통형 시편이 준비되었다. 준정적 시험에는 MTS 858을 사용하여 0.001 $s^{-1}$과 0.1 $s^{-1}$ 두 가지 변형률속도 조건으로 진행되어 결과를 분석하였다. 계장화 충격 시험에서는 Instron dynatup 9250HV를 사용하여, 각각 100 J, 200 J, 300 J의 서로 다른 충격에너지를 가했을 때의 응력-변형률 선도 결과를 비교 분석하였다.

Keywords

References

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