定型剂对经编织物液态成型复合材料工艺性及其力学性能的影响

摘要

The effects of bismaleimide tackifier with different contents on the styling effects,liquid composite molding processes and mechanical performances of the 0°/90° biaxial non-crimp fabric (NCF) were mianly studied.The thickness springback and C type springback researches were used to characterize the styling effects.The thickness compress and the bias extension test methods were used to characterize molding processes of NCF.And three-point bending experiment and interlaminar shear test were conducted on the mechanical properties of NCF.The experimental results show that bismaleimide tackifier plays significant styling effects on preform.The in-plane shear properties and the resistance of shear deformation of NCF with tackifier are obviously improved.The addition of tackifier has little effects on mechanical properties of the 0°/90° biaxial NCF.Tackifier can improve the performances of liquid composite molding processes of NCF,and preserve mechanical properties of the composites at the same time.%研究了双马来酰亚胺树脂定型剂含量对0°/90°双轴向经编织物(Non-crimp fabric,NCF)定型效果、液态成型工艺性、复合材料力学性能的影响.采用厚度回弹、C型回弹的方法表征定型效果;采用厚度压缩与偏轴拉伸实验表征带定型剂织物成型工艺性;并采用弯曲实验与层间剪切实验表征复合材料力学性能.实验结果表明定型剂的添加显著提高了NCF织物的预定型效果;经定型剂处理后NCF织物的面内剪切模量有了较大提高,抗剪切变形能力增强;添加定型剂对0°/90°双轴向NCF织物复合材料的力学性能影响不大,但在改善其工艺性的同时并不会降低其复合材料的力学性能.