摘要
为研究层间混杂碳纤维三维编织/单向(3D/UD)织物增强环氧树脂复合材料的力学性能,采用真空辅助树脂传递模塑(VARTM)成型工艺制备混杂复合材料层合板,通过试验研究分析了不同混杂比、铺层角度以及铺层顺序对混杂复合材料静、动态力学性能的影响。结果表明,单向碳纤维的加入显著提高了混杂复合材料的层间静态力学性能,其层间剪切性能随织物铺层分散性的增加而提升。而随着UD织物铺层比例的增加,混杂复合材料的弯曲性能和储能模量先升高后降低,压缩性能则不断下降。单向碳纤维的铺层角度对混杂复合材料力学性能的影响也较大,0°单向铺层混杂复合材料的静、动态力学性能均优于30°单向铺层混杂复合材料;在相同混杂比下,铺层顺序的不同对混杂复合材料的力学性能也有较大影响,0°单向铺层的三明治结构U6/3D/U6,其弯曲强度和弯曲弹性模量最高,分别为1210 MPa和117 GPa。此外,混杂复合材料3D编织层的失效以丝束与树脂的界面破坏为主,而单向层的失效以纤维断裂和分层破坏为主,不同的失效形式导致了混杂复合材料力学性能的差异。
In order to study the interlaminar mechanical properties of hybrid carbon fiber three-dimensional braided/unidirectional(3D/UD)fabric reinforced epoxy resin composites,hybrid composite laminates were prepared by vacuum assisted resin transfer molding(VARTM)molding process.The effects of different hybrid ratios,laying angle and layering sequences on the static and dynamic mechanical properties of hybrid carbon fiber reinforced plastic were studied.The results show that the addition of unidirectional carbon fiber significantly improves the interlayer static mechanical properties of the hybrid composites,and the interlayer shear properties increase with the increase of the dispersion of the fabric.With the increase of UD fabric lay-up ratio,the bending property and energy storage modulus of hybrid composites first increase and then decrease,while the compression property decreases continuously.The layering angle of unidirectional carbon fiber also has a great influence on the mechanical properties of hybrid composites.The static and dynamic mechanical properties of 0°unidirectional carbon fiber hybrid composites are better than those of 30°unidirectional carbon fiber hybrid composites.Under the same hybrid ratio,different layering sequences also have a great influence on the mechanical properties of hybrid composites.The sandwich structure U6/3D/U6(0°)has the highest bending strength and bending modulus,which are 1210 MPa and 117 GPa,respectively.In addition,the failure of three-dimensional braided layer of hybrid composites is mainly caused by the interface failure between fiber and resin,while the failure of unidirectional layer is mainly caused by fiber fracture and lamination.
作者
陈燕荣
孙琳
王晓明
张仁航
查一斌
李哲瑞
刘勇
程亚男
孙厚礼
张辉
CHEN Yanrong;SUN Lin;WANG Xiaoming;ZHANG Renhang;ZHA Yibin;LI Zherui;LIU Yong;CHENG Yanan;SUN Houli;ZHANG Hui(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China;Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2024年第4期17-22,共6页
Engineering Plastics Application
基金
国家重点研发计划项目(2023YFB3709603-01)
企业合作项目(SF/GY-梁字-2021-092)。
关键词
三维编织
层间混杂
复合材料
力学性能
three dimensional braiding
interlayer hybrid
composite
mechanical property
