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首页> 外文期刊>American journal of applied sciences >Tribological Performance of Materials Under Bio-Three Body Abrasion
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Tribological Performance of Materials Under Bio-Three Body Abrasion

机译：生物三体磨损下材料的摩擦学性能

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This study aims to investigate the effects of seed grinding process on the tribological characteristics of components in agricultural machines. The objective is to conduct the the effect of third body presence such as seeds on the tribological behavior of agriculture machines and evaluate the fracture mechanism of the seeds under three body abrasion loading conditions. The work consists of two main parts: Firstly, mechanical test which is related with the Hounsfield compression machines test and understanding the mechanical behaviour of wheat seed (Triticum aestivum) under compressive loading conditions. Secondly, the research aim to modify the current tribology machine to perform three body abrasion owing to test the rubbed components under seed third body configuration. Moreover, for each grind attempt, different discs have been used such as; the rubber disc, mild steel disc and stainless steel. The mechanical results revealed that the samples have maximum forces need to breakdown (rapture) the seed was (125 N) and minimum (84 N) average for all samples (102 N), stress results were maximum (1.81 Mpa), minimum (1.26 Mpa), average for all samples (1.58 Mpa) and in regarding to elongation average result was (0.86 mm). The failure mechanism was clear fracture in the seeds due to the brittleness behaviour of the seed and splitting of the seeds into two halves is the obvious damage feature. For the tribology machine, different attempts have been used to modify the machine to conduct the three-body abrasion for the grindings the seeds. However, there is no attempt displayed a good result. Grinding process for wheat seed by using rubber disc exhibited no result comes out because the seeds surfaces’ tribological properties cannot affect the rubber surface and both have the same smoothness surfaces. In another word, the seed shape is not multi-angles or has not brittle shape (nature) to provide better contact with rubber disc. Secondly with applying mild steel for grinding the same result find out the seed cannot grinding because the disc tribological still cannot supply best condition to crush seed might be this issue related with the shape of wheat seed also which is ellipse shape and the steel is highly smoothed. Therefore, both disc and seed are circle shape that is making them rotating each other’s rather than effect surface each other. Finally, the modification has been done for the tribo-machine enhancing the grinding operation. The modification was putting gear under the mild steel disc. This strategy helps the process quite successfully.
机译：本研究旨在探讨种子研磨过程对农业机械组成部件的影响。目的是进行第三身存在的影响，例如种子对农业机械的摩擦学行为，并评估三种体内磨损负载条件下种子的断裂机制。该工作包括两个主要部分：首先，机械测试与Hounsfield压缩机测试有关，并在压缩负载条件下理解小麦种子（Triticum aestivum）的机械行为。其次，研究旨在改变目前的摩擦学机器，以便在种子第三体配置下测试摩擦部件进行三个体磨损。此外，对于每个研磨尝试，已经使用了不同的光盘，例如;橡胶盘，温和钢盘和不锈钢。机械结果表明，样品具有最大力需要击穿（Rapture）种子是（125 n）和所有样品的最小（84n）（102n），应激结果最大（1.81MPa），最小（1.26 MPA），所有样品的平均值（1.58MPa）和关于伸长平均结果的平均值（0.86mm）。由于种子的脆性行为和种子分成两半的脆性行为是明显的损伤特征，失败机制在种子中是透明的骨折。对于摩擦学机器，不同的尝试已经过去用于改变机器以进行种子研磨的三体磨损。但是，没有尝试显示出良好的结果。采用橡胶圆盘磨削过程的小麦种子的研磨工艺没有出现出来的结果，因为种子表面和rsquo;摩擦学特性不能影响橡胶表面，两者都具有相同的平滑性表面。在另一个单词中，种子形状不是多角度或没有脆性形状（性质），以提供更好的接触橡胶盘。其次，对于磨削的温和钢来研磨相同的结果，发现种子无法磨削，因为盘摩擦仍然无法为压碎种子提供最佳条件可能是这种问题与小麦种子的形状也是椭圆形状的，钢的形状和钢的形状有关。高度平滑。因此，圆盘和种子都是圆形的，使它们彼此旋转，而不是彼此的效果。最后，已经为摩擦机提升了磨削操作来完成修改。修改是将齿轮放在温和的钢盘下方。该策略能够非常成功地帮助过程。

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