基于RTM-预浸料工艺的数值模拟与固化制度优化OA

The unsynchronized curing of prepreg and resin at the interface of RTM-prepreg process results in an obvious curing gradient,which reduces the mechanical properties of the interface.However,there are few studies on the co-curing process simulation and co-curing process curve.In this study,the mathematical models of the curing kinetics of epoxy resin and carbon fiber/epoxy resin prepreg were established,and the co-curing process was simu-lated by user-defined subroutine of ABAQUS software.The parameters of temperature profile such as heating rate,holding time,and holding temperature were optimized to simultaneous curing of the two materials at the interface.Fi-nally,the reliability of the simulation results was verified by short beam shear experiments and double cantilever beam experiments.The results show that the two materials at the interface have exothermic coupling,but have little effect on the resin curing of the interface materials.The short beam shear strength and mode Ⅰ interlaminar fracture toughness of the interface of the laminate are better than those of the prepreg layer under different curing curve.When the tem-perature profile is about 5 ℃/min,the temperature is raised to 1 80 ℃ and kept for 2 hours,the mechanical proper-ties of laminates are better than those of other curing curve.It has certain guiding significance for actual production.