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Multiple cracking in deformed laminated metal-graphene composites

机译:变形的层压金属-石墨烯复合材料的多次开裂

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摘要

A model is proposed for multiple cracking of graphene platelets in deformed laminated metal-graphene composites. Within the model, the first crack formed in a graphene platelet in the stress field of an applied load and a dislocation pileup emits dislocations that are accumulated near neighboring graphene platelets and lead to their cracking. Next, the process of dislocation emission from the existing cracks, their accumulation near neighboring graphene platelets and the cracking of these platelets repeats, eventually leading to multiple cracking of graphene platelets. We calculated the critical stress for the onset of cracking as a function of the structural parameters of the composites. The effect of amorphous layers around graphene platelets on fracture of metal-graphene composites is also briefly discussed.
机译:提出了在变形的层状金属-石墨烯复合材料中石墨烯薄片的多裂化模型。在该模型内,在施加的载荷和位错堆积的应力场中在石墨烯血小板中形成的第一个裂纹发出的位错聚集在相邻的石墨烯血小板附近并导致其破裂。接下来,从现有裂缝中释放出位错,其在邻近石墨烯血小板附近的聚集以及这些血小板的破裂的过程重复进行,最终导致石墨烯血小板的多次破裂。我们根据复合材料的结构参数计算了开裂的临界应力。还简要讨论了石墨烯薄片周围无定形层对金属-石墨烯复合材料断裂的影响。

著录项

  • 来源
    《Composite Structures》 |2018年第5期|113-118|共6页
  • 作者单位

    Peter Great St Petersburg Polytech Univ, St Petersburg 195251, Russia;

    Peter Great St Petersburg Polytech Univ, St Petersburg 195251, Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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