TY - JOUR
T1 - Mechanical behavior of liquid nitrile rubber-modified epoxy resin
T2 - experiments, constitutive model and application
AU - Xu, Xiao
AU - Gao, Shiqiao
AU - Zhang, Dongmei
AU - Niu, Shaohua
AU - Jin, Lei
AU - Ou, Zhuocheng
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/2
Y1 - 2019/2
N2 - Quasi-static and dynamic experiments were carried out to examine the influence of liquid nitrile rubber (LNBR) on the compressive behavior of epoxy resin. The quasi-static tests were performed on an electronic universal machine under strain rates of 10−4/s and 10−3/s, while a Split Hopkinson Pressure Bar (SHPB) system was adopted to conduct the dynamic tests for strain rates up to 5600/s. The standard Zhu-Wang-Tang (ZWT) nonlinear viscoelastic model was selected to predict the elastic behavior of LNBR/epoxy composites under a wide range of strain rates in this study. After several necessary derivations and data fittings, a set of ZWT model parameters for the tested materials were finally achieved. Meanwhile, the dynamic response of a typical high-overload measurement system encapsulated by LNBR/epoxy composites under impact loading was simulated by LS-DYNA, where the ZWT model was used to simulate the mechanical behavior of LNBR/epoxy composites with model parameters obtained from the experiments. It was concluded that both the resistance to failure and protective effect of epoxy resin could be enhanced by 10% LNBR additive. However, 25% LNBR additive would decrease the mechanical properties of the epoxy resin.
AB - Quasi-static and dynamic experiments were carried out to examine the influence of liquid nitrile rubber (LNBR) on the compressive behavior of epoxy resin. The quasi-static tests were performed on an electronic universal machine under strain rates of 10−4/s and 10−3/s, while a Split Hopkinson Pressure Bar (SHPB) system was adopted to conduct the dynamic tests for strain rates up to 5600/s. The standard Zhu-Wang-Tang (ZWT) nonlinear viscoelastic model was selected to predict the elastic behavior of LNBR/epoxy composites under a wide range of strain rates in this study. After several necessary derivations and data fittings, a set of ZWT model parameters for the tested materials were finally achieved. Meanwhile, the dynamic response of a typical high-overload measurement system encapsulated by LNBR/epoxy composites under impact loading was simulated by LS-DYNA, where the ZWT model was used to simulate the mechanical behavior of LNBR/epoxy composites with model parameters obtained from the experiments. It was concluded that both the resistance to failure and protective effect of epoxy resin could be enhanced by 10% LNBR additive. However, 25% LNBR additive would decrease the mechanical properties of the epoxy resin.
KW - Compressive experiments
KW - Encapsulating material
KW - LNBR/epoxy composites
KW - Protective effect
KW - ZWT nonlinear viscoelastic model
UR - http://www.scopus.com/inward/record.url?scp=85056574753&partnerID=8YFLogxK
U2 - 10.1016/j.ijmecsci.2018.11.003
DO - 10.1016/j.ijmecsci.2018.11.003
M3 - Article
AN - SCOPUS:85056574753
SN - 0020-7403
VL - 151
SP - 46
EP - 60
JO - International Journal of Mechanical Sciences
JF - International Journal of Mechanical Sciences
ER -