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不同黏度树脂基复合材料软模成型设计与缺陷控制
郭鸿俊1,高杨2,辛红1,高小方1,李桂洋1
1.航天材料及工艺研究所,北京 100076;2.火箭军驻519厂军事代表室,北京 100076
摘要:
根据碳纤维表面形貌与两种环氧树脂黏度特性,确定复合材料合适的固化压力。针对两种环氧树脂的黏度差异,比较膨胀压力设计及固化工艺优化方法。结果表明:高黏度环氧树脂体系的软模膨胀成型工艺适应性更好,固化周期缩短13.6%,凝胶压力设计温度(135±5) ℃能够保证产品内部质量,固化温度(170±5) ℃降低产品变形风险,支撑梁构件缺陷比例<0.5%,满足航天结构复合材料质量控制新常态的要求。
关键词:  复合材料  环氧树脂  软模成型  缺陷控制
DOI:10.12044/j.issn.1007-2330.2019.05.009
分类号:TB332
基金项目:国家自然科学基金-青年科学基金项目 51603058国家自然科学基金-青年科学基金项目(51603058)
Soft Molding Process Design and Defect Control for Two Composites With Different Viscosity Epoxy Resin
GUO Hongjun1,GAO Yang2,XIN Hong1,GAO Xiaofang1,LI Guiyang1
1.Aerospace Research Institute of Materials & Processing Technology,Beijing 100076;2.Military Representative Office of PLA Rocket Force in 519 Factory,Beijing 100076
Abstract:
Basis on the surface morphology of carbon fiber and viscosity characteristicstwo epoxy resin,the appropriate curing pressures have been defined.The expansion pressure design and curing process parameters was compared between the two epoxy resin with different viscosity.The results demonstrate that the epoxy resin with high viscosity has an obviously optimized manufacturability and shorten the curing cycle by 13.6%.The gel pressure design temperature(135±5) ℃ can guarantee the internal quality of the product,the curing temperature(170±5) ℃ reduces the risk of product deformation.The defect proportion of composites supporting beams can be controlled below 0.5%,implemented the quality requirement for aerospace structure composites.
Key words:  Composites  Epoxy resin  Soft molding process  Defect control