ISSN   1004-0595

CN  62-1095/O4

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孟凡明, 高贵响, 王雪丽. 硅藻壳孔状结构的摩擦学性能研究[J]. 摩擦学学报, 2014, 34(5): 504-511.
引用本文: 孟凡明, 高贵响, 王雪丽. 硅藻壳孔状结构的摩擦学性能研究[J]. 摩擦学学报, 2014, 34(5): 504-511.
MENG Fan-ming, GAO Gui-xiang, WANG Xue-li. Tribological Performances of Diatom Shell with Porous Structure[J]. TRIBOLOGY, 2014, 34(5): 504-511.
Citation: MENG Fan-ming, GAO Gui-xiang, WANG Xue-li. Tribological Performances of Diatom Shell with Porous Structure[J]. TRIBOLOGY, 2014, 34(5): 504-511.

硅藻壳孔状结构的摩擦学性能研究

Tribological Performances of Diatom Shell with Porous Structure

  • 摘要: 鉴于硅藻壳精细的孔状结构和良好的力学性能,选取较为典型的圆筛藻为研究对象,对其摩擦学性能进行了流固耦合分析(FSI).首先建立了圆筛藻壳壁的三维模型,然后应用计算流体动力学理论分析了圆筛藻壳不同孔径、孔深、孔距和速度下,其承载力(抵抗水压的能力)、摩擦力和摩擦系数等性能,并将该结构与无孔结构性能对比.结果表明:相对于无孔壳,硅藻壳的精细孔状结构可以增大其承载力,减小其与水环境间的摩擦.且在选取的尺寸范围内,随着硅藻壳体孔径或孔深的增大,其承载力增大,摩擦系数减小.

     

    Abstract: Due to the elaborate porous structure and good mechanical performances of a diatom shell, the representative Coscinodiscus sp. was modeled and its tribological performances were studied using a liquid-solid interaction method. The diatom shell with the elaborate porous structure was observed by using scanning electron microscopy. The tribological performances (load-carrying capacity or called pressure-resistance ability, friction force and friction coefficient) of the diatom were analyzed using the computational fluid dynamics theory, considering the diatom shell of various pore diameters, depths and spaces between the pores. The numerical results show that the porous structure for the diatom shell increased its load-carrying capacity and reduced friction against ambient water. With increasing pore diameter or pore depth, the load-carrying capacity for the diatom shell increased while friction coefficient decreased.

     

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