复合材料非热压罐工艺设计与力学性能研究

Study on Process Design and Mechanical Properties of Composite Non-autoclave

纤维增强树脂基复合材料具有比强度/比模量高、可设计性强、耐疲劳等优点,在航空航天领域获得了广泛的应用,但也面临着生产成本和效率问题。针对热压罐工艺高成本和高消耗的缺点,综合分析了热压罐工艺和真空辅助树脂灌注成型(Vacuum Assisted Resin Infusion,VARI)工艺的优缺点,对两种成型工艺进行优势整合后,在VARI工艺的基础上进行升级,设计了一种新的低成本非热压罐成型工艺,并对该工艺成型制件的性能进行评价。结果显示,与VARI工艺制件相比,在非热压罐工艺下成型的玻璃纤维层合板制件,其纤维体积分数提高了6%,拉伸模量提高了2.24GPa,拉伸强度提高了61MPa,层间剪切强度提高了2.96MPa。该设计显著改善了VARI工艺制件的力学性能,具有一定应用前景。

Fiber reinforced resin matrix composites have advantages such as high specific strength/specific modulus,strong designability,and fatigue resistance,and have been widely used in aerospace field.However,they also face production costs and efficiency issues.Aiming at the problem of high cost and high consumption for autoclave process,a comprehensive analysis is conducted on the advantages and disadvantages of autoclave process and vacuum assisted resin infusion (VARI) process.After integrating the advantages of the two molding processes,a new low-cost non-autoclave molding process is designed based on VARI process,and the performance of the molded parts using this process is evaluated.The results show that,compared with VARI process,the fiber volume fraction,tensile modulus,tensile strength and interlaminar shear strength of glass fiber laminates formed by non-autoclave process increase by 6%,2.24GPa,61MPa and 2.96MPa,respectively.This design significantly improves the mechanical properties of VARI process parts,and it has a certain application prospect.