摘要
以碳纤维为增强材料,平面三轴机织物为增强体结构,环氧树脂为基体,通过真空辅助树脂传递模塑技术(Vacuum assisted resin transfer molding,VARTM)制备了碳纤维三轴机织物增强环氧树脂基(Triaxial woven fabric/epoxy resin,TWF/EP)复合材料。借鉴金属材料薄板弯折性能试验方法,采用万能试验机开展TWF/EP的弯折实验,探究其弯折性能和损伤机制。研究结果表明:TWF/EP复合材料的弯折强度和模量与纤维束规格呈显著正相关性,与角度呈负相关性。在0°~30°范围内,TWF/EP复合材料的弯折性能变化幅度较小,表现出准各向同性。TWF/EP复合材料的力学响应表现为脆断,破坏模式分完全折断和不完全折断,TWF/EP复合材料的弯折断裂机制主要为纯剪切破坏、压剪耦合破坏及拉剪耦合破坏。
Carbon fiber triaxial woven fabric/epoxy resin(TWF/EP)composite was prepared by vacuum assisted resin transfer molding(VARTM)method,in which carbon fiber TWF was reinforced material,and epoxy resin was matrix.Referring to the metallic materials-sheet and strip-test method for bending and folding properties,the bending experiment of TWF/EP was carried out to explore its bending performance,and the damage morphology and damage mechanism were analyzed.The results show that the folding strength and modulus of TWF/EP composites have a significant positive correlation with the fiber bundle specification and a negative correlation with the angle.In the range of 0°-30°,the folding properties of TWF/EP composites change slightly and show quasi-isotropy.The mechanical response of TWF/EP composites is brittle fracture,and the failure mode can be divided into complete fracture and incomplete fracture.The folding fracture mechanisms are mainly pure shear failure,compressionshear coupling failure and tenso-shear coupling failure.
作者
宗香君
焦亚男
杨晓亚
何业茂
陈利
ZONG Xiangjun;JIAO Ya'nan;YANG Xiaoya;HE Yemao;CHEN Li(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Key Laboratory of Advanced Textile Composite Materials,Ministry of Education,Tiangong University,Tianjin 300387,China;Beijing Protech New Material Science CO.,LTD.,Beijing 102200,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2023年第6期3270-3278,共9页
Acta Materiae Compositae Sinica
基金
天津市高等学校创新团队项目(TD13-5043)。
关键词
碳纤维三轴机织复合材料
弯折性能
损伤力学模式
各向同性
力学响应
carbon fiber triaxial woven fabric composites
folding properties
damage mechanics
isotropy
mechanical response
