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首页> 外文期刊>The European physical journal, E. Soft matter >Desiccation of a clay film: Cracking versus peeling
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Desiccation of a clay film: Cracking versus peeling

机译：粘土膜的干燥：开裂和剥离

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摘要

We report a simulation study on competition between cracking and peeling, in a layer of clay on desiccation and how this is affected by the rate of drying, as well as the roughness of the substrate. The system is based on a simple 2-dimensional spring model. A vertical section through the layer with finite thickness is represented by a rectangular array of nodes connected by linear springs on a square lattice. The effect of reduction of the natural length of the springs, which mimics the drying is studied. Varying the strength of adhesion between sample and substrate and the rate of penetration of the drying front produces an interesting phase diagram, showing cross-over from peeling to cracking behavior. Changes in the number and width of cracks on varying the layer thickness is observed to reproduce experimental reports.
机译：我们报告了干燥过程中粘土层上裂纹和剥离之间竞争的模拟研究，以及这如何受到干燥速率以及基材粗糙度的影响。该系统基于简单的二维弹簧模型。通过具有有限厚度的层的垂直截面由节点的矩形阵列表示，该节点的矩形阵列由在方形格子上的线性弹簧连接。研究了减少弹簧的自然长度（模仿干燥）的效果。改变样品与基材之间的粘合强度以及干燥前沿的渗透速率会产生有趣的相图，该相图显示了从剥离到裂化行为的过渡。观察到随着层厚度的变化裂纹数量和宽度的变化，从而再现了实验报告。

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