热压罐工艺树脂压力测试系统适用性实验研究

采用玻璃纤维织物/环氧树脂E51预浸料研究热压罐工艺树脂压力在线测试系统适用性,分析了树脂黏度对测试系统动态反应特性的影响,进而测试了热压罐工艺零吸胶条件下等厚、非等厚及L形预浸料铺层内部的树脂压力,并与理论模型计算树脂压力对比,以分析测试系统的准确性。结果表明: 树脂黏度明显影响系统的动态反应特性,当树脂黏度低于25 Pa·s时树脂压力测试系统具有较高的动态反应特性,满足复合材料内部树脂压力测试需求; 对于所研究的各种形式的预浸料铺层,树脂压力测试值与理论值有很好的一致性,当热压罐压力达到0.5 MPa,相对误差约为2%,验证了系统的准确性。

Experimental study on the applicability of resin pressure measuring system during autoclave process

Glass fiber fabric (5HS)/epoxy resin E51 prepreg was prepared to study the applicability of on-line resin pressure measuring system during autoclave process in this paper. The effect of viscosity on the dynamic response properties was analyzed. In addition, the resin pressures inside flat, tapered and L-shaped prepreg stacks under zero-bleeding condition were measured by this system and calculated from theoretical model, respectively. These experimental data were additionally compared with theoretical ones to assess its accuracy. The results show that the viscosity greatly influences the dynamic response of the system. As the viscosity of resin is less than 25 Pa·s, the high dynamic response can meet the requirements of resin pressure measurement inside composites. In addition, the measured resin pressures inside prepreg stacks with different shapes involved in this paper are consistent with the theoretical ones. As the autoclave pressure reaches to 0.5 MPa, the relative errors are approximately 2%, and the accuracy of the system is validated.