Tailorable and Repeatable Normal Contact Stiffness via Micropatterned Interfaces

Jack  Perris; Yang  Xu; Mehmet Kartal; Nikolaj Gadegaard; Daniel M Mulvihill

doi:10.1007/s11249-021-01473-3

Tailorable and Repeatable Normal Contact Stiffness via Micropatterned Interfaces

Jack Perris, Yang Xu^* (Corresponding Author), Mehmet Kartal, Nikolaj Gadegaard, Daniel M Mulvihill^* (Corresponding Author)

^*Corresponding author for this work

Engineering

University of Glasgow

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

6 Citations (Scopus)

7 Downloads (Pure)

Abstract

An approach to producing interfaces with tailored and repeatable normal contact stiffness using micropatterned surfaces is developed. A finite element model is first used to design square wave interfaces having a range of stiffnesses and these are fabricated in polycarbonate via a microfabrication process. Results demonstrate that the contact stiffnesses of the fabricated interfaces are both tailorable and repeatable. The approach can be broadened to other materials and is useful for applications requiring specified interface stiffness. Finally, even with these deterministic interfaces, we show that low levels of roughness on the surface features is sufficient to produce a load-dependent contact stiffness at lower loads. Therefore, tailorability is mostly applicable above this limit where total contact stiffness converges to a load-independent value.

Original language	English
Article number	106
Number of pages	12
Journal	Tribology Letters
Volume	69
Early online date	17 Jul 2021
DOIs	https://doi.org/10.1007/s11249-021-01473-3
Publication status	Published - 2021

Bibliographical note

Acknowledgements

The authors would like to acknowledge the support of the Leverhulme Trust for funding the work via project grant “Fundamental Mechanical Behaviour of Nano and Micro Structured Interfaces” (RPG2017-353). The Leverhulme Trust are also acknowledged for providing the PhD studentship for the first author. We would also like to thank the technical staff at the James Watt Nanofabrication Centre (JWNC) at the University of Glasgow for assistance in fabricating the samples. Mr Alex Hamilton is thanked for useful discussions throughout the work.

Funding (Leverhulme Trust Project Grant No. RPG-2017-353)

Data Availability Statement

Data will be made available via an online university data repository.

Keywords

contact stiffness
structured surfaces
micropattern
microfabrication

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Cite this

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title = "Tailorable and Repeatable Normal Contact Stiffness via Micropatterned Interfaces",

abstract = "An approach to producing interfaces with tailored and repeatable normal contact stiffness using micropatterned surfaces is developed. A finite element model is first used to design square wave interfaces having a range of stiffnesses and these are fabricated in polycarbonate via a microfabrication process. Results demonstrate that the contact stiffnesses of the fabricated interfaces are both tailorable and repeatable. The approach can be broadened to other materials and is useful for applications requiring specified interface stiffness. Finally, even with these deterministic interfaces, we show that low levels of roughness on the surface features is sufficient to produce a load-dependent contact stiffness at lower loads. Therefore, tailorability is mostly applicable above this limit where total contact stiffness converges to a load-independent value. ",

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note = "Acknowledgements The authors would like to acknowledge the support of the Leverhulme Trust for funding the work via project grant “Fundamental Mechanical Behaviour of Nano and Micro Structured Interfaces” (RPG2017-353). The Leverhulme Trust are also acknowledged for providing the PhD studentship for the first author. We would also like to thank the technical staff at the James Watt Nanofabrication Centre (JWNC) at the University of Glasgow for assistance in fabricating the samples. Mr Alex Hamilton is thanked for useful discussions throughout the work. Funding (Leverhulme Trust Project Grant No. RPG-2017-353)",

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AU - Gadegaard, Nikolaj

AU - Mulvihill, Daniel M

N1 - Acknowledgements The authors would like to acknowledge the support of the Leverhulme Trust for funding the work via project grant “Fundamental Mechanical Behaviour of Nano and Micro Structured Interfaces” (RPG2017-353). The Leverhulme Trust are also acknowledged for providing the PhD studentship for the first author. We would also like to thank the technical staff at the James Watt Nanofabrication Centre (JWNC) at the University of Glasgow for assistance in fabricating the samples. Mr Alex Hamilton is thanked for useful discussions throughout the work. Funding (Leverhulme Trust Project Grant No. RPG-2017-353)

PY - 2021

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N2 - An approach to producing interfaces with tailored and repeatable normal contact stiffness using micropatterned surfaces is developed. A finite element model is first used to design square wave interfaces having a range of stiffnesses and these are fabricated in polycarbonate via a microfabrication process. Results demonstrate that the contact stiffnesses of the fabricated interfaces are both tailorable and repeatable. The approach can be broadened to other materials and is useful for applications requiring specified interface stiffness. Finally, even with these deterministic interfaces, we show that low levels of roughness on the surface features is sufficient to produce a load-dependent contact stiffness at lower loads. Therefore, tailorability is mostly applicable above this limit where total contact stiffness converges to a load-independent value.

AB - An approach to producing interfaces with tailored and repeatable normal contact stiffness using micropatterned surfaces is developed. A finite element model is first used to design square wave interfaces having a range of stiffnesses and these are fabricated in polycarbonate via a microfabrication process. Results demonstrate that the contact stiffnesses of the fabricated interfaces are both tailorable and repeatable. The approach can be broadened to other materials and is useful for applications requiring specified interface stiffness. Finally, even with these deterministic interfaces, we show that low levels of roughness on the surface features is sufficient to produce a load-dependent contact stiffness at lower loads. Therefore, tailorability is mostly applicable above this limit where total contact stiffness converges to a load-independent value.

KW - contact stiffness

KW - structured surfaces

KW - micropattern

KW - microfabrication

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M1 - 106

ER -

Tailorable and Repeatable Normal Contact Stiffness via Micropatterned Interfaces

Abstract

Bibliographical note

Data Availability Statement

Keywords

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