Abstract.

A particle raft is formed by a layer of small particles floating on a water surface, which has a higher load bearing capacity than pure water. In the present work, we have made a comprehensive study on the wrinkling number and force of the particle raft in planar compression. The wrinkling number during the whole loading process is measured, accompanied with snapshots on the morphologies of the particle raft. The force-displacement curve is given based on the loading system, which has been validated by the numerical simulation. Moreover, the experiment and theoretical results both show that the equivalent Young’s modulus is dependent upon the loading displacement. Finally, the maximum wrinkling number of the raft has been analyzed by the scaling law, which agrees well with the experimental result. These findings have deepen our understandings on the mechanical properties of soft materials, which also hold implications on drug delivery, chemical engineering, micro-fluidics, environment protection, petroleum exploitation, mineral flotation, etc.

Graphical abstract

中文翻译：

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颗粒筏在压缩中的起皱数量和作用力。

摘要。

浮筏是由漂浮在水面上的小颗粒层形成的，其承载能力比纯净水高。在目前的工作中，我们对平面压缩中颗粒筏的起皱数量和作用力进行了综合研究。测量整个加载过程中的皱纹数量，并附上有关粒子筏形态的快照。根据加载系统给出了力-位移曲线，该曲线已通过数值模拟验证。而且，实验和理论结果均表明等效杨氏模量取决于载荷位移。最后，通过比例定律对筏板的最大起皱次数进行了分析，与实验结果吻合良好。

图形概要