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Stick–slip phenomena and Schallamach waves captured using reversible cohesive elements
Journal of the Mechanics and Physics of Solids ( IF 5.0 ) Pub Date : 2021-06-24 , DOI: 10.1016/j.jmps.2021.104528
Evelyne Ringoot , Thibault Roch , Jean-François Molinari , Thierry J. Massart , Tal Cohen

Reversibility is of paramount importance in the correct representation of surface peeling in various physical settings, ranging from motility in nature, to gripping devices in robotic applications, and even to sliding of tectonic plates. Modeling the detachment–reattachment sequence, known as stick–slip, imposes several challenges in a continuum framework. Here we exploit customized reversible cohesive elements in a hybrid finite element model that can handle occurrence of snap-through instabilities. The simulations capture various peeling phenomena that emerge in experimental observations, where layers are pulled from a flat, rigid substrate in the direction parallel to the surface. For long layers, periodicity in reattachment is shown to develop and is linked to the concept of Schallamach waves. Further, the connection between surface properties and stick–slip behavior is investigated: we find that stick–slip is linked to the propensity of the interface to localize deformation and damage. Beyond elucidating the various peeling behaviors and the detachment modes, the computational framework developed here provides a straightforward approach for investigation of complex delamination processes, which can guide the development of future applications across different scales and in various settings.



中文翻译:

使用可逆内聚元件捕获粘滑现象和 Schallamach 波

可逆性对于正确表示各种物理环境中的表面剥离至关重要,从自然界的运动到机器人应用中的抓取装置,甚至是构造板块的滑动。对脱离-再附着序列进行建模,称为粘滑,在连续框架中提出了几个挑战。在这里,我们在混合有限元模型中利用定制的可逆内聚元素,该模型可以处理快速通过不稳定性的发生。模拟捕获了实验观察中出现的各种剥离现象,其中层从平坦的刚性基板上沿平行于表面的方向拉出。对于长层,重新附着的周期性显示出发展并与 Schallamach 波的概念相关联。更多,研究了表面特性和粘滑行为之间的联系:我们发现粘滑与界面局部变形和损坏的倾向有关。除了阐明各种剥离行为和分离模式之外,这里开发的计算框架还提供了一种研究复杂分层过程的直接方法,可以指导未来不同规模和各种环境中应用的开发。

更新日期:2021-07-02
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