Mechanical behavior of liquid nitrile rubber-modified epoxy resin under static and dynamic loadings: Experimental and constitutive analysis

Xiao Xu*, Shiqiao Gao, Zhuocheng Ou, Haifu Ye

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Quasi-static and dynamic compression experiments were performed to study the influence of liquid nitrile rubber (LNBR) on the mechanical properties of epoxy resin. The quasi-static experiments were conducted by an electronic universal machine under strain rates of 0.0001/s and 0.001/s, while a Split Hopkinson Pressure Bar (SHPB) system was adopted to perform the dynamic tests for strain rates up to 5600/s. The standard Zhu-Wang-Tang (ZWT) nonlinear viscoelastic model was chosen to predict the elastic behavior of LNBR/epoxy composites under a wide range of strain rates. After some necessary derivation and data fitting, a set of model parameters for the tested materials were finally obtained. Meanwhile, the incremented form of the ZWT nonlinear viscoelastic model were deduced and implemented into the user material program of LS-DYNA. A simulation-test contrast had been performed to verify the validity and feasibility of the algorithm. The results showed that the viscoelastic behavior of epoxy resin can be effectively simulated.

Original languageEnglish
Article number1565
JournalMaterials
Volume11
Issue number9
DOIs
Publication statusPublished - 30 Aug 2018

Keywords

  • Compression experiments
  • Incremented algorithm
  • LNBR/epoxy composites
  • ZWT nonlinear viscoelastic model

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Xu, X., Gao, S., Ou, Z., & Ye, H. (2018). Mechanical behavior of liquid nitrile rubber-modified epoxy resin under static and dynamic loadings: Experimental and constitutive analysis. Materials, 11(9), Article 1565. https://doi.org/10.3390/ma11091565