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首页> 外文期刊>Pure and Applied Geophysics >An Experimental Investigation on the Tribological Behaviour of Nominally Flat Quartz Grains with Gouge Material in Dry, Partial Saturated and Submersed Conditions
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An Experimental Investigation on the Tribological Behaviour of Nominally Flat Quartz Grains with Gouge Material in Dry, Partial Saturated and Submersed Conditions

机译：一种实验研究，对干燥，部分饱和和浸入式条件下粗糙石英粒子的摩擦学行为

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摘要

We examined the normal and tangential contact behaviour of gouge materials between nominally flat quartz grains using micromechanical experiments. Primary mixtures of plastic clay (montmorillonite) and non-plastic silt (crushed aggregates) were used as gouges to focus the investigation on the tribological behaviour of gouge materials at dry, partial saturation and submersion conditions. The presence of gouges resulted in a decreased normal stiffness and frictional strength compared to pure quartz surfaces, and complex crushing behaviour. From cyclic shearing tests, montmorillonite showed the lowest secant stiffness and maximum energy losses, which were more pronounced at lower normal loads. Montmorillonite in its plastic and semi-solid states indicated that variation of post-peak softening and friction coefficient depend on the normal load at a given partial saturation level. In the sudden submersion simulation tests, both before and after the start of shearing, montmorillonite showed a significant decrease in the coefficient of friction (compared to dry gouge), unlike non-plastic silt.
机译：我们在使用微机械实验中检查了名义上平石英粒之间凿屑材料的正常和切向接触行为。塑料粘土（MONTMORILLONITE）和非塑料淤泥（压碎的聚集体）的主要混合物被用作凿子，以重点调查凿孔材料在干燥，部分饱和和浸没条件下的摩擦学行为的调查。与纯石英表面相比，凹槽的存在导致正常刚度和摩擦强度降低，以及复杂的破碎行为。从循环剪切试验中，Montmorillonite显示出最低的刚度和最大能量损失，在较低的正常负载下更明显。 Montmorillonite在其塑料和半固态中表明后峰值软化和摩擦系数的变化取决于给定部分饱和度水平的正常负载。在突然的浸没模拟试验中，在剪切开始之前和之后，蒙脱石都显示出摩擦系数（与干凿）的显着降低，与非塑料淤泥不同。

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