Atomic or molecular simulation technology is gradually used in the performance simulation of organic ballistic fibers and their composites, to reveal their various performance mechanisms and evolutionary mechanisms from the molecular point of view. Atomic or molecular simulation technology in the mechanical properties, thermal properties, aging properties, properties of aramid fiber composite fibers, and interface properties of aramid fiber-reinforced composites are summarized in this paper.

Carbon fiber reinforced epoxy composites is playing a role in reducing structural weight and costs, saving resources and optimizing processes. However, the low properties of epoxy matrix and the weak interfacial bonding between carbon fiber and epoxy lead to the poor interlaminar performancec for carbon fiber or fabric reinforced epoxy composites. The application of nanomaterials is an effective way to improve or enhance the interlaminar properties of composite materials. Therefore, this paper summarized the research on the methods of nanomaterialsto reinforce resin matrix, and nanomaterials-carbon fibers multi-scale reinforcement to enhance the interlaminar performace, and nanomaterials to distribute the surface of prepreg uniformly, and nanomaterials to promote interfacial binding energy between carbon fiber and epoxy and nanomaterials macrostructure to improve the interlaminar properties of composites.

Graphene is a two-dimensional nanostructure filler with high thermal conductivity (5000 W/mK) and excellent mechanical properties, which has a very wide application prospect. Graphene is with super high specific surface area, which provides a greater contact area with polymer matrix. Then it is more easy to form the thermal conductive heat channels, which could improve the thermal conductivity of composite materials. The concentration, the ratio of geometrical diameters, the dispersion in the matrix and the interfacial bonding between graphene and the matrix materials will greatly affect the thermal conductivity of graphene reinforced composites. However, the graphene nanosheets can be easy to stack together and difficult to be dispersed into the solvent and polymer matrix. In order to improve the interfacial combination between graphene nanosheets and the matrix so as to reduce the interfacial thermal resistance of the composites, it is usually to modify the surface of graphene nanosheets, which mainly includes non-covalent modification and covalent modification. In this paper, researches on the thermal conductivity of graphene were reviewed, and the existing problems and the future research focus were also discussed.

It analysis and discuss the main procedures and their relativity of reverse design. Due to loss of original design data of a composite special-shaped structure, we start from the analysis of reverse design. According to the inner surface forming characteristics, we use the three-coordinate contact measurement to take the points and reverse design the shape, analyze and adjust the design surface to meet the requirements. The surface and solid of composite laminate are formed, and the production data is provided meeting the needs of rapid product development. We should reverse design the product from model analysis, and consider the processes of analysis-measurement-forming as a whole.

Due to the growing needs of thermal management in modern electronics, epoxy-based composites are increasingly demanded in heat dissipating materials. A simple preparation of composites with high thermalconductivity was developed through the graphenenanosheetshomogeneously dispersed in theepoxy matrix. A high thermal conductivityof 0.4843W/mK ( increased by184% over that of pure epoxy) could be obtained for the compositeswith a filler content of 5wt.%. It was proved that high aspect ratio of GNPs are critical issues of theconstitution of a special interface region between the GNPs and epoxy matrix of the composites.The more than mere additive effect on the through-thickness thermal conductivity suggests synergistic physical interactions between graphenenano sheets leading to further enhancement in the through-thickness thermal conductivity. Thus, the graphene-reinforced composites are promising for usageas an efficient heat spreader for heat dissipation applications.