Steady-State Strength Behavior of Geomaterial Interfaces as an Abrasion Process

9900033Dove国家对民用基础设施建设和修复的兴趣产生了对由土材料、聚合物和金属组成的复合结构的研究的需求。复合材料结构的主要应用包括衬砌和承台系统、基础系统、地下公用设施和通信。 这些应用的设计方法需要了解土壤和结构之间的稳态摩擦。 目前还没有很好的微观模型存在这种相互作用。在这项研究中，土壤和典型的民用基础设施部件的表面材料之间的稳态摩擦力将被建模为一个磨损过程。 现有的摩擦学模型预测磨损的摩擦和磨损将扩大到包括地质材料。 该模型将与实验结果进行验证。 首先，土壤颗粒在一系列形状的几何和空间特性将被量化。 然后，这些颗粒施加在未润滑和润滑的表面上的力的条件下，可变的正应力和可变的材料硬度将被测量和结果与模型的预测进行比较。***

9900033DoveThe national interest in civil infrastructure construction and rehabilitation has created a need for the study of composite structures consisting of earth materials, polymers, and metals. Major applications for composite structures include liner and cap systems, foundation systems, underground utility installations, and communications. Design methodologies for these applications require knowledge of the steady-state friction between soil and structure. At present no good microscopic model exists for this interaction.In this study the steady-state friction forces between the soil and the surface material of typical civil infrastructure components will be modeled as an abrasion process. An existing tribology model for predicting friction and wear in abrasion will be extended to include geomaterials. The model will be validated with experimental results. First the geometric and spatial properties of soil grains over a range of shapes will be quantified. Then the forces exerted by these particles on unlubricated and lubricated surfaces under conditions of variable normal stress and variable material hardness will be measured and the results compared with the predictions of the model. ***