热压罐固化环氧基复合材料孔隙形成研究

Study on Formation of Voids in Autoclave Curing Epoxy Matrix Composites

通过调整固化工艺参数,模拟了碳纤维增强环氧树脂基复合材料层压板中孔隙的形成。对不同固化参数制备的层压板孔隙率进行了检测标定和金相显微镜测量验证。分析结果显示,固化压力、真空度、加压时机以及制造过程中裹入的挥发性溶剂都会对层压板的孔隙率产生影响。起始加压及减小真空压力都会降低复合材料层压板的孔隙率,随着固化压力的增大,挥发性溶剂对层压板孔隙率的影响将会逐渐减小。

The simulation of voids forming in the laminates of the carbon fiber reinforced epoxy resin composites is researched by adjusting the curing process parameters. The laminate curing parameters of different porosity are prepared and verification through metallographic micro-scope measurenlent. The analysis results show that curing pressure, vacuum, pressure time and volatile solvents entrapped in the manufacturing process have influence on the laminate porosity. The pressure belore curing and reduce the vacuum pressure will decrease the porosity of the composite laminates. With the increase of curing pressure, the influence of volatile solvent on the laminate porosity will decreases.