Abstract A coating layer is often present on engineering surfaces. An example is a zinc coating on steel sheet, this being a soft metallic coating on a hard substrate. To characterize the tribological behaviour of these engineered surfaces, it is necessary to understand the mechanical behaviour of the coating during ploughing. The material point method (MPM)-based ploughing model has been used to compute friction and the ploughed profile when an asperity is ploughing through a coated surface. An analytical ploughing model has also been used to study the effect of the thickness and hardness of the coating relative to the substrate on coefficient of friction using rigid-plastic material behaviour and its results have been compared with the MPM-model results. The MPM-based ploughing model has been experimentally validated and is shown to agree well with the ploughing experiments using rigid spherical indenters sliding through lubricated-zinc coated steel, uncoated steel and bulk zinc over a range of applied loads.

中文翻译：

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软金属涂层中耕作行为的分析、数值和实验研究

摘要 工程表面往往存在涂层。一个例子是钢板上的锌涂层，这是硬质基材上的软金属涂层。为了表征这些工程表面的摩擦学行为，有必要了解涂层在犁耕过程中的机械行为。基于材料点法 (MPM) 的犁耕模型已被用于计算粗糙面犁过涂层表面时的摩擦力和犁过的轮廓。分析犁耕模型也已用于研究涂层相对于基材的厚度和硬度对摩擦系数的影响，使用刚塑性材料行为，并将其结果与 MPM 模型结果进行比较。