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Open AccessArticle

Mechanical Behavior of Liquid Nitrile Rubber-Modified Epoxy Resin under Static and Dynamic Loadings: Experimental and Constitutive Analysis

1
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
2
Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(9), 1565; https://doi.org/10.3390/ma11091565
Received: 1 August 2018 / Revised: 21 August 2018 / Accepted: 23 August 2018 / Published: 30 August 2018
(This article belongs to the Section Advanced Composites)
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. View Full-Text
Keywords: LNBR/epoxy composites; compression experiments; ZWT nonlinear viscoelastic model; incremented algorithm LNBR/epoxy composites; compression experiments; ZWT nonlinear viscoelastic model; incremented algorithm
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Xu, X.; Gao, S.; Ou, Z.; Ye, H. Mechanical Behavior of Liquid Nitrile Rubber-Modified Epoxy Resin under Static and Dynamic Loadings: Experimental and Constitutive Analysis. Materials 2018, 11, 1565.

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