Low-velocity impact responses of shear-thickening fluid-filled honeycomb sandwich structures

LI Yuwei; YI Changcheng; LIU Zhifang; LEI Jianyin; LI Shiqiang

doi:10.11883/bzycj-2024-0095

Volume 45 Issue 1

Jan. 2025

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Article Navigation > Explosion And Shock Waves > 2025 > 45(1): 013103

LI Yuwei, YI Changcheng, LIU Zhifang, LEI Jianyin, LI Shiqiang. Low-velocity impact responses of shear-thickening fluid-filled honeycomb sandwich structures[J]. Explosion And Shock Waves, 2025, 45(1): 013103. doi: 10.11883/bzycj-2024-0095

Citation:

LI Yuwei, YI Changcheng, LIU Zhifang, LEI Jianyin, LI Shiqiang. Low-velocity impact responses of shear-thickening fluid-filled honeycomb sandwich structures[J]. Explosion And Shock Waves, 2025, 45(1): 013103. doi: 10.11883/bzycj-2024-0095

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Low-velocity impact responses of shear-thickening fluid-filled honeycomb sandwich structures

doi: 10.11883/bzycj-2024-0095

LI Yuwei^1
,,
YI Changcheng¹,
LIU Zhifang^{1, 2},
LEI Jianyin^{1, 2},
LI Shiqiang^{1, 2
,
,}

1.
Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2.
Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan 030024, Shanxi, China

Received Date: 2024-04-07
Rev Recd Date: 2024-06-29

Available Online: 2024-07-03

Publish Date: 2025-01-01

Abstract

Abstract

As an environmentally friendly energy-absorbing material, shear-thickening fluid (STF) can be applied to protective structures to improve impact resistance. STF was obtained by mixing fumed silica particles with polyethylene glycol solution. It was then filled into a honeycomb core layer to make STF-filled honeycomb sandwich panels. Finally, the effect of STF on the impact resistance of the structure was explored. The impact force-displacement curves were obtained by using the drop weight impact experiment, and the effects of impact velocity (1.0, 1.5, 2.0 m/s), honeycomb aperture diameter (2.0, 2.5, 3.0 mm), and wall thickness (0.04, 0.06, 0.08 mm) on the mechanical properties of the sandwich panel were studied. At the same time, digital image correlation technology was utilized, which is an optical method for measuring the deformation of the surface of an object. By comparing the pixel displacements in multiple images, the strain history and deflection field distribution of the back panel of the structure were obtained, and the low-velocity impact response process of the structure was discussed. The experimental results show that under low-velocity impact, there is bump deformation in the center area of the back panel of the STF-unfilled honeycomb sandwich panel, and there is obvious bulging deformation in the surrounding area. The central area of the back panel of the STF-filled honeycomb sandwich panels has a wider range of bump deformations and no bulging around it. The shear-thickening effect of STF can increase the honeycomb elements involved in energy absorption, expand the local deformation area of the structure, and reduce the deflection of the back panel of the structure. Increasing the impact velocity, increasing the honeycomb aperture diameter, or decreasing the wall thickness are all more conducive to the shear-thickening effect of STF. The results provide a reference for the application of STF in protective structures.
- shear-thickening fluid,
- honeycomb sandwich panel,
- low-velocity impact,
- morphing mode,
- digital image correlation technology

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References(20)

References

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