The peridynamic theory of solid mechanics is applied to the continuum modeling of the impact of small, high-velocity silica spheres on multilayer graphene targets. The model treats the laminate as a brittle elastic membrane. The material model includes separate failure criteria for the initial rupture of the membrane and for propagating cracks. Material variability is incorporated by assigning random variations in elastic properties within Voronoi cells. The computational model is shown to reproduce the primary aspects of the response observed in experiments, including the growth of a family of radial cracks from the point of impact.

中文翻译：

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多层石墨烯微弹穿孔的蠕变动力学模型

固体力学的周动力学理论被应用于连续的建模，即小型高速二氧化硅球对多层石墨烯靶的影响。该模型将层压板视为脆性弹性膜。材料模型包括用于膜的初始破裂和扩展裂纹的单独破坏准则。通过在Voronoi单元内分配弹性特性的随机变化，可以合并材料的可变性。计算模型显示可再现实验中观察到的响应的主要方面，包括从冲击点开始的一系列径向裂纹的增长。