Study On The Electrical And Mechanical Properties Of GNPs Modified Conductive Segregate Structure Interlayers Composite Laminate

Carbon fiber laminate composites are an important material for aircraft structural design due to its excellent mechanical properties.However,carbon fiber composite materials have weak electrical conductivity,which is difficult to directly meet the requirements of electromagnetic shielding of aircraft structures,and is prone to static electricity accumulation and cause flight accidents.Therefore,it is of great significance to develop graphene-modified isolation structure intercalated conductive composites,which can not only exert the excellent mechanical and electrical properties of graphene,but also combine with high-efficiency conductive isolation structure functional layers.Scale strengthening and conductive function enhancement can significantly improve the mechanical and conductive properties of intercalated composites,which will help promote the development and application of advanced carbon fiber composite structures with integrated structure and function.In this study,based on the homogenization equivalent idea and multi-scale modeling method,a multi-scale cell prediction model for the mechanical and electrical properties of graphene-modified conductive isolation intercalated composite plate was proposed.Firstly,on the nano-scale,considering the phenomenon of graphene stack agglomeration,the two-scale model idea was adopted,and the representative volume unit of graphene agglomerates was selected,and a geometric model of agglomerated graphene was established,and the equivalent electrical and mechanical properties of this model were used to characterize the agglomerated graphene region.Then,a geometric model of randomly distributed graphene was established,and the equivalent electrical and mechanical properties of this model were used to characterize the matrix containing a small amount of graphene.Finally,an analysis and prediction model for the electrical and mechanical properties of the agglomerated graphene modified resin was established,and the effects of graphene content and agglomeration ratio on the electrical and mechanical properties of the matrix were systematically analyzed.On the micro-scale,a prediction model for the electrical and mechanical properties of the isolated conductive thin film functional layer and unidirectional carbon fiber structural layer based on graphene modified resin was established.On the mesoscale,the conductive film was introduced into the carbon fiber laminate,and an analysis and prediction model for the electrical and mechanical properties of the intercalated composite material containing the conductive film was established.and the influence of mechanical properties.Studies have shown that the graphene-modified resin-isolated structure intercalation composite has good electrical conductivity and mechanical properties.After analysis and discussion,the multi-scale modification mechanism of structure-conductive intercalation composites was initially revealed,and valuable conclusions were obtained,which laid a solid theoretical foundation for the subsequent optimization design and analysis of structure-function integrated intercalation composites.