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A new hypothesis on the mechanism of nano-filled elastomers reinforcement
Mechanics of Advanced Materials and Modern Processes Pub Date : 2018-12-17 , DOI: 10.1186/s40759-018-0040-x
Alexander Konstantinovich Sokolov , Oleg Konstantinovich Garishin , Alexander L’vovich Svistkov

Incorporation of active fillers to rubber markedly improves the strength properties and deformation characteristics of such materials. One possible explanation of this phenomenon is suggested in this work. It is based on the fact that for large deformations the binder (high-elastic, cross-linked elastomer) in the gaps between the filler particles (carbon black) is in a state close to the uniaxial extension. The greater part of polymer molecular chains are oriented along the loading axis in this situation. Therefore it can be assumed that the material in this state has a higher strength compared to other ones at the same intensity of deformation. In this paper, a new strength criterion is proposed, and a few examples are given to illustrate its possible use. It is shown that microscopic ruptures that occur during materials deformation happen not in the space between filler particles but at some distance around from it without breaking particle “interactions” through these gaps. The verification of this approach in modeling the stretching of a sample from an unfilled elastomer showed that in this case it works in full accordance with the classical strength criteria, where the presence in the material of a small defect (microscopic incision) leads to the appearance and catastrophic growth of the macrocrack.

中文翻译:

纳米填充弹性体增强机理的新假说

将活性填料掺入橡胶中可显着改善此类材料的强度性能和变形特性。在这项工作中提出了对此现象的一种可能的解释。基于这样的事实,对于大的变形,填料颗粒(炭黑)之间的间隙中的粘合剂(高弹性,交联弹性体)处于接近单轴延伸的状态。在这种情况下,大部分聚合物分子链沿加载轴取向。因此,可以假定,在相同变形强度下,处于这种状态的材料比其他材料具有更高的强度。本文提出了一种新的强度准则,并给出了一些例子来说明其可能的用途。结果表明,在材料变形过程中发生的微观破裂不在填料颗粒之间的空间中发生,而是在与填料颗粒之间的一定距离处发生,而不会通过这些间隙破坏颗粒“相互作用”。对这种方法进行建模的验证来自未填充弹性体的样品拉伸表明,在这种情况下,它完全符合经典的强度标准,材料中存在小的缺陷(微观切口)会导致外观和大裂纹的灾难性增长。
更新日期:2018-12-17
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