论文标题
简单的剪切流中的半串联床单的屈曲，折断和翻滚
Buckling, Crumpling, and Tumbling of Semiflexible Sheets in Simple Shear Flow
论文作者
论文摘要
随着2D材料（例如石墨烯，过渡金属二核苷）和2D聚合物变得越来越普遍，溶液加工和胶体状态的特性正在被利用以创建高级和功能性的材料。但是，我们仍然缺乏对2D纸和膜在流体流中的基本行为的理解。在这项工作中，我们对剪切流中的流体动力相互作用进行了无脑膜半灵相互作用的数值模拟。对于最初以流量梯度平面为导向的纸张，我们发现不同模式数字的屈曲不稳定性随弯曲刚度而变化，并且可以通过准静态弹性模型来理解。对于不同的初始方向，观察到混乱的翻滚轨迹。值得注意的是，我们发现床单在翻滚前折叠或皱纹，但在施加更大的剪切时不会再次伸展。
As 2D materials such as graphene, transition metal dichalcogenides, and 2D polymers become more prevalent, solution processing and colloidal-state properties are being exploited to create advanced and functional materials. However, our understanding of the fundamental behavior of 2D sheets and membranes in fluid flow is still lacking. In this work, we perform numerical simulations of athermal semiflexible sheets with hydrodynamic interactions in shear flow. For sheets initially oriented in the flow-gradient plane, we find buckling instabilities of different mode numbers that vary with bending stiffness and can be understood with a quasi-static model of elasticity. For different initial orientations, chaotic tumbling trajectories are observed. Notably, we find that sheets fold or crumple before tumbling but do not stretch again upon applying greater shear.
