Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
권호 표지
DOI QR코드

DOI QR Code

A Constitutive Equation Including Strain Rate Effect for the Expanded Polypropylene

변형률 속도가 고려된 발포 폴리프로필렌의 구성방정식

  • Kim, Han-Kook (Department of Mechanical Engineering, Kongju National University) ;
  • Cheon, Seong S. (Division of Mechanical and Automotive Engineering, Kongju National University)
  • Received : 2014.07.07
  • Accepted : 2014.08.26
  • Published : 2014.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this paper is to build DB in order to Propose new constitutive equations by redefining constitutive equations for Polyurethane presented by Jeong et al. [12] based on Quasi-static test and Impact test DB of Expanded polypropylene using cylindrical specimens with 4 different densities presentsd by Kim et al. [7] for EPP foam and combining the impulse-momentum theory.

본 논문에서는 Kim 등[7]이 제시한 4가지의 다른 밀도를 갖는 원통형 시험편으로한 EPP(Expanded polypropylene)의 준정적(Quasi-static test) 및 충격 시험(Impact test) DB를 바탕으로 Jeong 등[12]이 제시한 폴리우레탄(Polyurethane)에 대한 구성방정식을 EPP 폼에 대하여 다시 정의 하여 충격량-운동량 이론을 접목시켜 새로운 구성방정식을 제안하기위한 DB 구축을 목표로 하였다.

Keywords

References

  1. Willinger, M., "Industrial Development of Composite Materials: Toward a Functional Appraisal", Journal of Composite Science and Technology, Vol. 34, 1989, pp. 53-71. https://doi.org/10.1016/0266-3538(89)90077-8
  2. Wang, D.J., Qiu, J., Gui, Z.L., and Li, L.T., "Design for High-performance Functional Composite Thermister Materials by Glass/ceramic Composing", Journal of Material Research, Vol. 14, No. 7, 1999, pp. 2993-2996. https://doi.org/10.1557/JMR.1999.0401
  3. Moutos Franklin, T., Freed Lisa, E., and Guilak Farshid, "A Biomimetic Three-dimensional Woven Composite Scaffold for Functional Tissue Engineering of Cartilage", Journal of Nature Materials, Vol. 6, 2007, pp. 162-167. https://doi.org/10.1038/nmat1822
  4. 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.
  5. 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.
  6. Choi, C.H., "Expanded Polypropylene and Packaging Materials," Journal of the Monthly Packaging World, No. 214, 1996, pp. 58-67.
  7. Kim, H.K., Kim, B.J., Jeong, K.Y., and Cheon, S.S., "Experimental Study for the Impact Characteristics of Expanded EPP/EPS Foams", Journal of the Korean Society for Composite Materials, Vol.26, No. 6, 2013, pp. 343-348. https://doi.org/10.7234/composres.2013.26.6.343
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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, Korea, No. 2013, pp. 149-150.
  14. Kim, B.J., Kim, H.K., and Cheon, S.S., "A Study on the Absorbed Energy of Polymer material of Vehicles between Mass and Strain Rate Effect Velocity Value based on Constant Energy", Proceeding of the Korean Society for Composite Materials, Korea, May 2013, pp. 43-44.
  15. Munshi, M.B., Jeong, K.Y., Choi, Y.J., and Cheon, S.S., "Crashworthy behaviour of Rigid Polyurethane Foam under Constant Impact Energy", Proceeding of the 2007 Lecture and Paper Abstracts, 2007, pp. 1776-1780.