Solidification of a shear thickening fluid in a finite volume under low-velocity impact

Cui，Xiaoyu1,2; Ye，Lin1,3; Wang，Hongjian1; Fu，Kunkun2

2022-12-01

10.1016/j.ijimpeng.2022.104358

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING   影响因子和分区

0734-743X

1879-3509

Shear thickening fluids show a reversible viscosity increase and even a transient solid-like behaviour when the shear rate is above a critical value, hence they are widely used as an impact energy absorber. This work aims to characterise the low-velocity impact behaviour of an STF in a finite volume in a container − a situation where the material is normally used in a real-life application. The STF contains 58 vol% styrene/acrylate particles dispersed in ethylene glycol. Instrumented drop-weight impact tests are carried out, with transducers attached on the striker, the bottom and the side wall of the container, to characterise the low velocity impact-activated solidification behaviour of STF, addressing the effect of the finite volume. A new two-dimensional mechanistic model is proposed to describe the evolution of the solidification of the STF with a finite volume under the low-velocity impact. It was found that the impact-activated solidification of the STF is clearly dependent on not only the depth of the STF, as reported in previous studies, but also the radial dimension of the STF. In addition, the propagation velocities of the solidification front, in both the depth and radial directions, are found to be linearly proportional to the impact velocity.

Finite volume Load transducers Low-velocity impact Shear thickening fluid Solidification front

SCI ; EI

英语

通讯

Engineering ; Mechanics

Engineering, Mechanical ; Mechanics

WOS:000864076000003

PERGAMON-ELSEVIER SCIENCE LTD

20223412596578

Ethylene ; Ethylene glycol ; Shear flow ; Solidification ; Styrene ; Transducers

Fluid Flow, General:631.1 ; Chemical Operations:802.3 ; Organic Compounds:804.1

ENGINEERING

2-s2.0-85136041696

Scopus

1.School of Aerospace,Mechanical and Mechatronic Engineering,The University of Sydney,2006,Australia
2.School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai,200092,China
3.School of System Design and Intelligent Manufacturing (SDIM),Southern University of Science and Technology,Shenzhen,China

Cui，Xiaoyu,Ye，Lin,Wang，Hongjian,et al. Solidification of a shear thickening fluid in a finite volume under low-velocity impact[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2022,170.

Cui，Xiaoyu,Ye，Lin,Wang，Hongjian,&Fu，Kunkun.(2022).Solidification of a shear thickening fluid in a finite volume under low-velocity impact.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,170.

Cui，Xiaoyu,et al."Solidification of a shear thickening fluid in a finite volume under low-velocity impact".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 170(2022).