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Published September 2020 | public
Journal Article

Dynamic compressive behaviour of sandwich panels with lattice truss core filled by shear thickening fluid

Abstract

The compressive behaviour of sandwich panels with lattice truss core filled by shear thickening fluid (SPLTC-STF) at high strain-rates is performed analytically and numerically. Firstly, a hydrodynamic constitutive model for the shear thickening fluid (STF) involving shear thinning, shear thickening, and hydrostatic compressibility is undertaken to describe the dynamic behaviour of the STF. Then an analytical model based on the squeezing flow of viscous fluids is proposed. The squeezing resistance of the STF between the two panels of the SPLTC under various loading velocities is analyzed using a fluid-structure interaction (FSI) simulation, by which the constitutive parameters of the STF are obtained. Finally, the dynamic response of the SPLTC-STF involving buckling and post-buckling of core struts in the STF is investigated using the FSI method. The enhanced energy absorption capacity of the SPLTC-STF observed in Ref [1] is numerically interpreted. The effects of shear thickening behaviour of STF on the dynamic response of SPLTC-STF are predicted, providing a method of optimal design for STF filled sandwich panels over a wide range of impulses for dynamic energy absorption.

Additional Information

© 2020 Elsevier Ltd. Received 22 January 2020, Revised 24 April 2020, Accepted 10 May 2020, Available online 22 May 2020.

Additional details

Created:
August 22, 2023
Modified:
October 20, 2023