摘要
为分析多层多向机织复合材料的细观结构,基于多层多向机织工艺及不同于传统机织结构的纱线空间运动规律,推导了工艺参数与结构参数之间的关系,建立了细观结构分析模型;为研究多层多向机织复合材料的拉伸性能和失效机制,采用多层多向机织工艺、树脂传递模塑复合工艺,以碳纤维和环氧树脂为原材料制备了2种不同结构的多层多向机织复合材料,采用万能试验机和非接触全场应变仪对材料进行了0°和90°方向的准静态拉伸性能测试,并与正交三向机织复合材料进行了对比分析。结果表明:斜向纱的存在对多层多向机织复合材料的拉伸破坏模式和断口形貌有较大影响,斜向纱一定程度上阻碍了裂纹和应变沿承载方向扩展,0°方向拉伸试样断口处经纱层内经纱全部断裂,90°方向拉伸试样断口处纬纱层内纬纱全部断裂,2个方向的拉伸试样斜向纱层中均存在部分斜向纱纤维未断裂,拉伸试样非完全断裂。
In order to study the tensile property and failure mechanism of multilayer multiaxial woven composites, based on the multilayer multiaxial weaving process and the spatial movement rule of yarn in the structure, the relationship between process parameters and structure parameters were deduced. Two kinds of multilayer multiaxial woven composites of different structures were prepared from carbon fibers and epoxy resin as raw materials by the multilayer multiaxial weaving process and the resin transfer molding composite process. The quasi-static tensile property of the material were measured by universal testing machine and a non-contact all-field stain meter, and was compared with that of three-dimensional orthogonal composite. The results show that the content of bias yarn in the structure has certain influence of the warpwise tensile property of the multilayer multiaxial woven composites. Bias yarn blocks cracks and strain from extending along the warpwise direction to a certain extent, and influences the failure modes of the material to a great extent. All the warps in the warp layer at the fracture of the sample are broken, and some of yarn in the bias yarn layer are not broken, and the tensioned samples are not completely broken.
作者
王心淼
陈利
张典堂
陈冬
WANG Xinmiao;CHEN Li;ZHANG Diantang;CHEN Dong(College of Textile Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;Key Laboratory of Advanced Textile Composites, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China;Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education , Wuxi, Jiangsu 214122, China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2019年第2期45-52,共8页
Journal of Textile Research
基金
天津市高等学校创新团队项目(TD13-5043)
关键词
多层多向机织
机织复合材料
细观结构
拉伸性能
multilayer multiaxial woven preform
woven composite
micro-structure
tensile property
