为揭示复合材料在拉伸过程中的破坏机理，对石墨烯/碳化硅复合材料的拉伸力学性能进行了分子动力学模拟． 研究结果表明: 石墨烯与碳化硅接触的界面结构会影响复
合材料的整体力学性能; 相较于纯碳化硅，石墨烯/碳化硅复合材料在拉伸时，损伤更容易在界面处成核并生长; 当石墨烯与碳化硅通过不同界面接触时，石墨烯与基底之间的不同相互作用使复合材料有不同的力学性能，相较于石墨烯直接与碳化硅的C 表面接触，当石墨烯与Si 原子接触时复合材料有更高的强度和失效应变．

In order to discover the underlying mechanisms of tensile fracture of composites,the tensile mechanical properties of graphene /SiC composites are simulated on the basis of molecular dynamics ( MD) .The results show that ( 1) the interface between graphene and SiC may affect the mechanical properties of the whole composite systems; ( 2) in comparison with the damage of bulk SiC systems,the damage of the composites tends to nucleate and grow on the interface in the tension process; ( 3) graphene /SiC composites with different interface structures possess different mechanical behaviors due to the various interaction between graphene and SiC; and ( 4) in comparison with the contact of grapheme sheet with C surface,the direct contact of single graphene sheet with Si in the substrate results in higher strength and failure strain.