Frictional Contact of Soft Polymeric Shells

Riad Sahli; Jeppe Mikkelsen; Mathias Sätherström Boye; Marcelo A. Dias; Ramin Aghababaei

doi:10.1103/PhysRevLett.133.106202

Frictional Contact of Soft Polymeric Shells

Riad Sahli, Jeppe Mikkelsen, Mathias Sätherström Boye, Marcelo A. Dias^*, Ramin Aghababaei^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

The classical Hertzian contact model establishes a monotonic correlation between contact force and area. Here, we showed that the interplay between local friction and structural instability can deliberately lead to unconventional contact behavior when a soft elastic shell comes into contact with a flat surface. The deviation from Hertzian solution first arises from bending within the contact area, followed by the second transition induced by buckling, resulting in a notable decrease in the contact area despite increased contact force. Additionally, our results invalidated a previous claim of a linear relation between friction and dissipated energy, demonstrating the suppression of both buckling and dissipation at high friction levels. Different contact regimes are discussed in terms of rolling and sliding mechanisms, providing insights for tailoring contact behaviors in soft shells.

Original language	English
Article number	106202
Journal	Physical Review Letters
Volume	133
Issue	10
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.133.106202
Publication status	Published - 6 Sept 2024

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10.1103/PhysRevLett.133.106202

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title = "Frictional Contact of Soft Polymeric Shells",

abstract = "The classical Hertzian contact model establishes a monotonic correlation between contact force and area. Here, we showed that the interplay between local friction and structural instability can deliberately lead to unconventional contact behavior when a soft elastic shell comes into contact with a flat surface. The deviation from Hertzian solution first arises from bending within the contact area, followed by the second transition induced by buckling, resulting in a notable decrease in the contact area despite increased contact force. Additionally, our results invalidated a previous claim of a linear relation between friction and dissipated energy, demonstrating the suppression of both buckling and dissipation at high friction levels. Different contact regimes are discussed in terms of rolling and sliding mechanisms, providing insights for tailoring contact behaviors in soft shells.",

author = "Riad Sahli and Jeppe Mikkelsen and Boye, {Mathias S{\"a}therstr{\"o}m} and Dias, {Marcelo A.} and Ramin Aghababaei",

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AU - Sahli, Riad

AU - Mikkelsen, Jeppe

AU - Boye, Mathias Sätherström

AU - Dias, Marcelo A.

AU - Aghababaei, Ramin

PY - 2024/9/6

Y1 - 2024/9/6

N2 - The classical Hertzian contact model establishes a monotonic correlation between contact force and area. Here, we showed that the interplay between local friction and structural instability can deliberately lead to unconventional contact behavior when a soft elastic shell comes into contact with a flat surface. The deviation from Hertzian solution first arises from bending within the contact area, followed by the second transition induced by buckling, resulting in a notable decrease in the contact area despite increased contact force. Additionally, our results invalidated a previous claim of a linear relation between friction and dissipated energy, demonstrating the suppression of both buckling and dissipation at high friction levels. Different contact regimes are discussed in terms of rolling and sliding mechanisms, providing insights for tailoring contact behaviors in soft shells.

AB - The classical Hertzian contact model establishes a monotonic correlation between contact force and area. Here, we showed that the interplay between local friction and structural instability can deliberately lead to unconventional contact behavior when a soft elastic shell comes into contact with a flat surface. The deviation from Hertzian solution first arises from bending within the contact area, followed by the second transition induced by buckling, resulting in a notable decrease in the contact area despite increased contact force. Additionally, our results invalidated a previous claim of a linear relation between friction and dissipated energy, demonstrating the suppression of both buckling and dissipation at high friction levels. Different contact regimes are discussed in terms of rolling and sliding mechanisms, providing insights for tailoring contact behaviors in soft shells.

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Frictional Contact of Soft Polymeric Shells

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