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DEM simulation of stress transmission under agricultural traffic Part 2: Shear stress at the tyre-soil interface
Soil and Tillage Research ( IF 6.1 ) Pub Date : 2020-06-12 , DOI: 10.1016/j.still.2020.104660
Jan De Pue , Mathieu Lamandé , Wim Cornelis

Although it has been proven to be of considerable importance, it remains unclear how to model the effect of traction on soil compaction. This study used multiple approaches to simulate the stress under an active wheel with the pseudo-continuous Söhne model, and compared it to a discrete element method (DEM) model of the same scenario. It was found that the differences in normal horizontal stress (σy) due to these different boundary conditions in the Söhne model were limited. According to these simulations, the effect on normal vertical stress (σz) was negligible. This was in contrast with the DEM simulations, where the impact of traction on σy was also stronger and less shallow. Advanced numerical models can be used to gain insight in the importance of traction, and could be used to improve the boundary condition of the Söhne model. However, further experimental validation is needed.



中文翻译:

农业交通条件下应力传递的DEM模拟第2部分:轮胎-土壤界面的剪应力

尽管已被证明非常重要,但仍不清楚如何模拟牵引力对土壤压实的影响。这项研究使用多种方法来模拟伪连续Söhne模型在主动轮下的应力,并将其与相同场景的离散元素方法(DEM)模型进行比较。结果发现,在正常水平应力(差异σ Ý)由于在SÖHNE模型这些不同的边界条件的限制。根据这些模拟,在正常的垂直应力(效果σ Ž)是微不足道的。这是在与DEM模拟,其中所述上牵引的影响对比度σ ÿ也更强壮,不那么浅。先进的数值模型可用于了解牵引力的重要性,并可用于改善Söhne模型的边界条件。但是,还需要进一步的实验验证。

更新日期:2020-06-12
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