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土壤黏附力特别是土壤与轮胎或履带间的切向黏附对提高非公路用车的性能具有显著的作用。从另一方面来说,土壤黏附作用在轮胎或履带上会降低车辆的通过性。为了能有效解决这一问题,有必要对土壤黏附的机理进行探讨。该研究意在探讨水表面张力对土壤粒子与接触面间切向土壤黏附力的影响。不同直径的玻璃微珠用来模拟土壤颗粒,对3种不同材料进行试验。试验测定了玻璃微珠外不同直径水膜下,玻璃微珠与金属板之间的切向力。结果表明,在任何玻璃微珠直径下,任何试材的切向黏附力都与水膜直径成正比。对于任何材料,比例系数k(反映切向黏附力与水膜直径的关系)都随着玻璃微珠直径呈线性增加。如果使用亲水材料,则k接近线性系数。因此,切向黏附力与玻璃微珠外水膜密切相关。
Soil adhesion, especially the tangential adhesion of soils to tires or tracks, plays a significant role in improving the performance of off-highway vehicles. On the other hand, soil adhesion reduces the passage of vehicles on tires or tracks. In order to solve this problem effectively, it is necessary to discuss the mechanism of soil adhesion. The purpose of this study was to investigate the effect of water surface tension on tangential soil adhesion between soil particles and the contact surface. Glass beads of different diameters were used to simulate soil particles and three different materials were tested. The test measures the tangential force between the glass beads and the metal plate under different water diameters of the glass beads. The results show that the tangential adhesion of any test specimen is directly proportional to the diameter of the water film at any glass bead diameter. For any material, the coefficient of proportionality k, which reflects the relationship between tangential adhesion and water film diameter, increases linearly with the diameter of the glass beads. If a hydrophilic material is used, k is close to a linear coefficient. Therefore, the tangential adhesion is closely related to the water film outside the glass beads.