Frictional Contact of Soft Polymeric Shells,Physical Review Letters

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Frictional Contact of Soft Polymeric Shells
Physical Review Letters ( IF 8.1 ) Pub Date : 2024-09-04 , DOI: 10.1103/physrevlett.133.106202
Riad Sahli ₁ , Jeppe Mikkelsen ₁ , Mathias Sätherström Boye ₁ , Marcelo A. Dias ₂ , Ramin Aghababaei ₁

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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.

中文翻译：

软聚合物壳的摩擦接触

经典赫兹接触模型建立了接触力和面积之间的单调相关性。在这里，我们表明，当软弹性壳与平坦表面接触时，局部摩擦和结构不稳定性之间的相互作用可能会故意导致非常规的接触行为。与赫兹解的偏差首先源于接触区域内的弯曲，然后是屈曲引起的第二次转变，导致尽管接触力增加，但接触面积显着减小。此外，我们的结果证实了先前关于摩擦力与耗散能量之间存在线性关系的主张，证明了在高摩擦水平下对屈曲和耗散的抑制。从滚动和滑动机制的角度讨论了不同的接触方式，为定制软壳中的接触行为提供了见解。

更新日期：2024-09-05

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