Optimising non-Newtonian fluids for impact protection of laminates

James A. Richards; Daniel J. M. Hodgson; Rory E. O'Neill; Michael E. DeRosa; Wilson C. K. Poon

doi:10.1073/pnas.2317832121

Optimising non-Newtonian fluids for impact protection of laminates

James A. Richards^*, Daniel J. M. Hodgson, Rory E. O'Neill, Michael E. DeRosa, Wilson C. K. Poon

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

Non-Newtonian fluids can be used for the protection of flexible laminates. Understanding the coupling between the flow of the protecting fluid and the deformation of the protected solids is necessary in order to optimize this functionality. We present a scaling analysis of the problem based on a single coupling variable, the effective width of a squeeze flow between flat rigid plates, and predict that impact protection for laminates is optimized by using shear-thinning, and not shear-thickening, fluids. The prediction is verified experimentally by measuring the velocity and pressure in impact experiments. Our scaling analysis should be generically applicable for non-Newtonian fluid-solid interactions in diverse applications.

Original language	English
Article number	e2317832121
Pages (from-to)	1-7
Number of pages	7
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	121
Issue number	10
DOIs	https://doi.org/10.1073/pnas.2317832121
Publication status	Published - 27 Feb 2024

Keywords / Materials (for Non-textual outputs)

shear thickening
composites
fluid-solid interaction
smart materials
shear thinning

Access to Document

10.1073/pnas.2317832121Licence: Creative Commons: Attribution (CC-BY)

2023-17832RAccepted author manuscript, 921 KBLicence: Creative Commons: Attribution (CC-BY)

Impact Acceleration Account - University of Edinburgh 2017
Mount, A. & Richards, J.
1/04/17 → 30/06/22
Project: Research

Cite this

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title = "Optimising non-Newtonian fluids for impact protection of laminates",

abstract = "Non-Newtonian fluids can be used for the protection of flexible laminates. Understanding the coupling between the flow of the protecting fluid and the deformation of the protected solids is necessary in order to optimize this functionality. We present a scaling analysis of the problem based on a single coupling variable, the effective width of a squeeze flow between flat rigid plates, and predict that impact protection for laminates is optimized by using shear-thinning, and not shear-thickening, fluids. The prediction is verified experimentally by measuring the velocity and pressure in impact experiments. Our scaling analysis should be generically applicable for non-Newtonian fluid-solid interactions in diverse applications.",

keywords = "shear thickening, composites, fluid-solid interaction, smart materials, shear thinning",

author = "Richards, {James A.} and Hodgson, {Daniel J. M.} and O'Neill, {Rory E.} and DeRosa, {Michael E.} and Poon, {Wilson C. K.}",

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AU - Richards, James A.

AU - Hodgson, Daniel J. M.

AU - O'Neill, Rory E.

AU - DeRosa, Michael E.

AU - Poon, Wilson C. K.

N1 - 7 pages, 5 figures with SI of 2 pages, 3 figures

PY - 2024/2/27

Y1 - 2024/2/27

N2 - Non-Newtonian fluids can be used for the protection of flexible laminates. Understanding the coupling between the flow of the protecting fluid and the deformation of the protected solids is necessary in order to optimize this functionality. We present a scaling analysis of the problem based on a single coupling variable, the effective width of a squeeze flow between flat rigid plates, and predict that impact protection for laminates is optimized by using shear-thinning, and not shear-thickening, fluids. The prediction is verified experimentally by measuring the velocity and pressure in impact experiments. Our scaling analysis should be generically applicable for non-Newtonian fluid-solid interactions in diverse applications.

AB - Non-Newtonian fluids can be used for the protection of flexible laminates. Understanding the coupling between the flow of the protecting fluid and the deformation of the protected solids is necessary in order to optimize this functionality. We present a scaling analysis of the problem based on a single coupling variable, the effective width of a squeeze flow between flat rigid plates, and predict that impact protection for laminates is optimized by using shear-thinning, and not shear-thickening, fluids. The prediction is verified experimentally by measuring the velocity and pressure in impact experiments. Our scaling analysis should be generically applicable for non-Newtonian fluid-solid interactions in diverse applications.

KW - shear thickening

KW - composites

KW - fluid-solid interaction

KW - smart materials

KW - shear thinning

U2 - 10.1073/pnas.2317832121

DO - 10.1073/pnas.2317832121

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JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

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M1 - e2317832121

ER -

Optimising non-Newtonian fluids for impact protection of laminates

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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Projects

Impact Acceleration Account - University of Edinburgh 2017

Cite this