Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites

碳纤维增强树脂基复合材料振动预处理-微波固化工艺的实验研究

The vibration pretreatment-microwave curing process is an efficient,low energy consumption,and high-quality out-of-autoclave curing process for carbon fiber resin matrix composites.This study aims to investigate the impact of vibration pretreatment temperature on the fiber weight content,microscopic morphology and mechanical properties of the composite laminates by using optical digital microscopy,universal tensile testing machine and thermo-gravimetric analyzer.Additionally,the combined mode of Bragg fiber grating sensor and temperature measurement fiber was employed to explore the effect of vibration pretreatment on the strain process during microwave curing.The study results revealed that the change in vibration pretreatment temperature had a slight impact on the fiber weight content when the vibration acceleration remained constant.The metallographic and interlaminar strength of the specimen formed at a vibration pretreatment temperature of 80℃ demonstrated a porosity of 0.414% and a 10.69% decrease in interlaminar shear strength compared to autoclave curing.Moreover,the introduction of the vibration energy field during the microwave curing process led to a significant reduction in residual strain in both the 0°and 90°fiber directions,when the laminate was cooled to 60℃.

振动预处理-微波固化工艺是一种高效、低能耗、高质量的碳纤维树脂基复合材料罐外固化工艺。本文旨在利用光学数码显微镜、万能拉伸试验机和热重分析仪,研究振动预处理温度对复合材料层压板的纤维重量含量、微观形貌和力学性能的影响。此外,采用布拉格光纤光栅传感器和测温光纤相结合的模式,探讨了微波固化过程中振动预处理对应变过程的影响。研究结果表明,当振动加速度保持不变时,振动预处理温度的变化对纤维重量含量的影响很小。与热压罐固化工艺相比,振动预处理温度为80℃时形成的试样的金相和层间强度显示,孔隙率为0.414%,层间剪切强度降低了10.69%。此外,在微波固化过程中引入振动能量场后,当层压板冷却到60℃时,0°和90°纤维方向的残余应变都显著减少。