The Manufacture Of Resin Matrix Composites Chain Box Via Resin Transfer Molding

Properties of room-temperature curing epoxy resin systems, fabrications and mechanical properties of aramid/basalt fiber reinforced epoxy resin hybrid composites panels, fabrications and properties of fibrous preforms with different compaction times as well as the manufacture of resin matrix composites chain box were studied according to the demands of resin transfer molding(RTM).The degree of cure for different time in room temperature of four candidate epoxy resins was characterized using differential scanning calorimetry. The flexural properties of the four candidate epoxy resins cured for different time in room temperature was investigated. The rheology property was studied and the chemical rheology model equation was obtained based on the dynamic viscosity property and the isothermy viscosity of the four candidate epoxy resins. And the most premium room temperature curing epoxy resin system which was applicable to RTM was selected. The results showed that the degree of cure of 1564/HY3487 resin system reached high level and exhibited superior flexural property after been cured in room temperature for different elapsed times. It also exhibited a low viscosity and long-term stable RTM operating platform in room temperature, and can be used for the matrix of molding composites chain box in room temperature.Aramid/basalt fibers reinforced epoxy resin hybrid composites panels were prepared by RTM and the influences of different hybrid modes on the tensile property, flexural property, impact toughness and fracture morphology of composite materials was investigated. The results suggested that impact toughness presented an evident positive hybrid effect, while the H3 hybrid mode composites had excellent integrated performances, it was the optimum scheme of hybrid mode whose tensile strength, flexural strength and impact toughness reached 396.76 MPa, 346.80 MPa and 171.06 kJ/m2 respectively.Influence of compaction times on the springback of fibrous preform was studied through different compaction times on fibrous preform by using the self-made device. The research indicated that the springback of fibrous preform tended to be smaller, the permeability was decreased, the fiber volume fraction of the prepared composite materials increased, and the flexural property and impact property were improved as the compaction times were increased. Taking the results of improvement in properties and the feasibility of operation into account, compaction times of ten was the appropriate process parameters.Case mold and mold of the chain box were built. The best injection scheme was obtained through mold filling simulation of the resin by using the RTM-Worx software. Then the mold was processed according to the best injection scheme and wax core mold was fabricated using the core mold. The fiber reinforced pre-molding body was made using the wax core mold and the resin matrix composites chain box was made via RTM by combining the pre-molding body and the processed external mold.