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발포 EPP/EPS의 충격특성에 관한 실험적 연구

Experimental Study for the Impact Characteristics of Expanded EPP/EPS Foams

  • 김한국 (국립 공주대학교 기계공학과) ;
  • 김병준 (국립 공주대학교 기계공학과) ;
  • 정광영 (국립 공주대학교 기계공학과) ;
  • 전성식 (국립 공주대학교 기계공학과)
  • 투고 : 2013.06.27
  • 심사 : 2013.12.22
  • 발행 : 2013.12.31

초록

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.

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.

키워드

참고문헌

  1. Cha, K.C., Song, J.S., Lee, S.M., and Mun, M.S., "Effects of Chain Extender and Inorganic Filler on the Properties of Semirigid Polyurethane Foams," Journal of the Korean Polymer, Vol. 34, No. 1, 2010, pp. 8-13.
  2. Szycher, M., Szycher's Handbook of Polyurethanes Boca Raton: CRC Press, 1999.
  3. Kim. M.H., Cho, S.S., and Ha, S.K., "Design and Structural Analysis of Aluminum Bumper for Automobiles," Transactions of KSAE, Vol. 7, No. 3, 1999, pp. 217-227.
  4. Lee, S.J., Park, J.S., Koo, D.H., and Jung, B.H., "The Development of Material Technology Applied to Bumper Beam," Transactions of KSAE, Vol. 10, No. 4, 2002, pp. 206-215.
  5. Choi, C.H., "Expanded Polypropylene and Packaging Materials," Journal of the Monthly Packaging World, No. 214, 1996, pp. 58-67.
  6. Kang, W.J., Cheon, S.S., Lee, I.H., Choi, S.U., Min, J.H., Lee, S.H., and Bea, B.K., "Investigation of the Strain Rate Effects of EPS Foam," The Journal of the Korean Society for Composite Materials, Vol. 23, No. 1, 2010, pp. 64-68. https://doi.org/10.7234/kscm.2010.23.3.064
  7. Choi, K.S., Kang, W.J., Kim, K.H., and Kim, S.K., "High Strain Rate Compression Behavior of EPP Bumper Foams," Transactions of the Korean Society of Automotive Engineers, Vol. 17, No. 4, 2009, pp. 118-125.
  8. Kim, J.S., Huh, H., Lee, K.W., Ha, D.Y., Yeo, T.J., and Park, S.J., "Evaluation of Dynamic Tensile Characteristics of Polypropylene with Temperature Variation," International Journal of Automotive Technology, Vol. 7, No. 5, 2006, pp. 571-577.
  9. Bouuix, R., Voit, P., and Lataillade, J., "Polypropylene Foam Behaviour Under Dynamic Loading : Strain Rate, Density and Microstructure Effects," International Journal of Impact Engineering, Vol. 36, Issue. 2, 2009, pp. 329-342. https://doi.org/10.1016/j.ijimpeng.2007.11.007
  10. Ouellet, S., Cornin D., and Worswick, M., "Compressive Response of Polymeric Foams Under Quasi-static Medium and High Strain Rate Conditions," Polymer Testing, Vol. 25, No. 6, 2006, pp. 731-743. https://doi.org/10.1016/j.polymertesting.2006.05.005
  11. Huh, H., Kang, W.J., and Han, S.S., "A Tension Split Hopkinsom Bar for Investigating the Dynamic Behavior of Sheet Metals," Experimental Mechanics, Vol. 42, No. 1, 2002, pp. 8-17. https://doi.org/10.1007/BF02411046
  12. Huh, H., Kim, S.B., Song, J.H., and Lim, J.H., "Dynamic Tensile Characteristics of TRIP-type and DP-type Steel Sheets for and Auto-body," International Journal of Mechanical Sciences, Vol. 50, 2008, pp. 918-931. https://doi.org/10.1016/j.ijmecsci.2007.09.004
  13. Jeong, K.Y., Cheon, S.S., and Munshi, M.B., "A Constitutive Model for Polyurethane Foam with Strain Rate Sensitivity," Journal of Mechanical Science and Technology, Vol. 26, No. 7, 2012, pp. 2033-2038. https://doi.org/10.1007/s12206-012-0509-1
  14. Jeong, K.Y., Kim, B.J., and Cheon, S.S., "A Constitutive Equation for Expanded Polypropylene Foam under Dynamic Loading," Proceeding of The Korean Society for Composite Materials, Changwon, Korea, Nov. 2013, pp. 149-150.
  15. Paul, A., and Pamamurty, U., "Strain Rate Sensitivity of a Closed-cell Aluminium Foam," Materials Science and Engineering A, 2000, Vol. 281, pp. 1-7. https://doi.org/10.1016/S0921-5093(99)00750-9
  16. Lopatnikov, S.L., Gama, B.A., and Gillespie Jr J.W., "Modeling the Progressive Collapse Behaviour of Material Foam," International Journal of Impact Engineering, Vol. 134, 2007, pp.587-595.
  17. Jeon, H.S., Choi, Y.C., and Park, J.W., "Measuring Structural Vibration Using Curve Fitting from Vedio Signal," Journal of the Korean Society for Noise and Vibration Engineering, Vol. 23, No. 11, 2007, pp. 99-107.

피인용 문헌

  1. A Constitutive Equation Including Strain Rate Effect for the Expanded Polypropylene vol.27, pp.4, 2014, https://doi.org/10.7234/composres.2014.27.4.130
  2. Application of the EPU Constitutive Equation to expanded Polypropylene under Dynamic Loading vol.27, pp.4, 2014, https://doi.org/10.7234/composres.2014.27.4.135
  3. 3D 프린터로 제작된 EPS 비정형 거푸집의 변형 보정 기술 vol.37, pp.1, 2021, https://doi.org/10.5659/jaik.2021.37.1.183