Abstract The discrete element method (DEM) is one of the main modelling techniques in the agricultural sector to investigate soil tillage. There is a model-like description for material abrasion, which is often based on the determination of a virtual material removal, but the geometrical changes of the geometry, as well as the continuous load change upon the tool, are often not considered in the DEM simulations. Research on wear of tillage tools have been focused mostly on experimental studies with the result that abrasion is mainly caused by micro cutting on the contact surface. The single asperity scratch test is considered to be most suitable for evaluating materials due to its abrasive wear resistance. This paper presents an innovative approach that investigates the influence on the continuous wear process. The presented method describes the geometrical changes of the geometry based on the material loss. DEM simulations have replicated the single asperity test for different normal forces. Taking into account the geometric changes, these achieve the same wear volume and are therefore suitable for investigations of wear processes during soil tillage.

中文翻译：

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用离散元法通过划痕试验模拟土壤耕作过程中的磨料损失

摘要 离散元法（DEM）是农业领域研究土壤耕作的主要建模技术之一。对材料磨损有一种类似模型的描述，它通常基于对虚拟材料去除的确定，但在 DEM 中通常不考虑几何形状的变化以及刀具上的连续载荷变化模拟。耕作工具磨损的研究主要集中在实验研究上，结果磨损主要是由接触面的微切割引起的。由于其耐磨性，单粗糙划痕测试被认为最适合评估材料。本文提出了一种研究对连续磨损过程的影响的创新方法。所提出的方法描述了基于材料损失的几何形状的几何变化。DEM 模拟复制了针对不同法向力的单一粗糙度测试。考虑到几何变化，这些实现了相同的磨损量，因此适用于土壤耕作过程中磨损过程的研究。