Rational hyperelastic modelling of elastic poured compound for the failure analysis of embedded rail system

Li Wang, Shaoguang Li, Ping Wang, Rong Chen*, Zili Li

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The continuous homogeneous rail constraint of embedded rail system (ERS) is realized by the encapsulation of rails with the elastic poured compound (EPC) which is a composite material. Previous treatment of EPC as linear elastic material was insufficient in the failure analysis of ERS. In this work, a hyperelastic model is developed to describe the mechanical properties of the EPC with engineering strain up to 150%. Physical tests of uniaxial tension, planar tension and quadruple shear are conducted. A 4-parameter Ogden model is determined by curve fitting and validated with a progressive validation strategy, and then is applied to the failure analysis of ERS. It is found that the material nonlinearity of EPC contributes noticeably to the decrease of the longitudinal stiffness of ERS. The 2nd debonding is more probably caused by the failure of adhesive at the interface between EPC and rail rather than EPC itself.

Original languageEnglish
Pages (from-to)833-854
Number of pages22
JournalInternational Journal of Rail Transportation
Volume11
Issue number6
DOIs
Publication statusPublished - 2022

Keywords

  • composite material
  • elastic poured compound
  • Embedded rail system
  • failure analysis
  • finite element method
  • hyperelastic model

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