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Investigating the confining compressibility of STF at high deformation rate

Published online by Cambridge University Press:  12 December 2012

Weifeng Jiang ,
Xinglong Gong ,
Yulei Xu ,
Shouhu Xuan ,
Wanquan Jiang ,
Wei Zhu ,
Xiaofeng Li  and
Lijun Qin
Weifeng Jiang
Affiliation:
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China (USTC), Hefei 230027, P.R. China
Xinglong Gong*
Affiliation:
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China (USTC), Hefei 230027, P.R. China
Yulei Xu
Affiliation:
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China (USTC), Hefei 230027, P.R. China
Shouhu Xuan
Affiliation:
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China (USTC), Hefei 230027, P.R. China
Wanquan Jiang
Affiliation:
Department of Chemistry, USTC, Hefei 230026, P.R. China
Wei Zhu
Affiliation:
Department of Chemistry, USTC, Hefei 230026, P.R. China
Xiaofeng Li
Affiliation:
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China (USTC), Hefei 230027, P.R. China
Lijun Qin
Affiliation:
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China (USTC), Hefei 230027, P.R. China
*
ae-mail: gongxl@ustc.edu.cn
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Abstract

The split Hopkinson pressure bar (SHPB) was used to study the compressibility of shear thickening fluid (STF) at high deformation rate. In this study, a steel bulk was introduced into the SHPB system to confine and load the STF. A series of STFs with different particle types (SiO2 and PSt-EA) and volume fractions (63 vol.% and 65 vol.%) were tested and the results were compared. The reliability of the results was proved by repeating the tests and the force balance in suspension. The bulk modulus was used to evaluate the compressibility of STF, which indicated that the SiO2-based STF exhibited a larger compressibility than the PSt-EA-based STF. It was found that the bulk modulus increases with increasing of the strain rate and the volume fraction shows little effect on the bulk modulus. The structure-dependent mechanical property was analyzed and the loading effect of bulk modulus was considered to be originated from the interparticle clustering.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 60 , Issue 3 , December 2012 , 31101
Copyright
© EDP Sciences, 2012

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