摘要
为了研究双轴向经编织物的内部结构对渗透率的影响,通过一种由图像采集系统和树脂流动仿真软件集成的3D渗透率测试装置,对织物铺层的预制件进行三维渗透率的测试。通过比较缝线组织与密度、纤维束细度、粘结剂涂层等因素引起的面内和厚度方向上渗透率的变化,分析了双轴向经编织物内部结构对其渗透性能的影响。实验结果表明:缝线结构的存在具有降低面内渗透率而提高厚度方向上的渗透率的作用;相较于机织结构,缝线组织为经编组织的双轴向预制件具有更高的面内渗透率;双轴向经编织物的纤维束细度变化引起的面内渗透率变化与不同的纤维压缩状态紧密相关;表面有粘结剂定型的双轴向经编织物,面内渗透率大大提高,而在厚度方向上的渗透率减小。
In order to study the influence of the internal structure of the bi-axial warp knitting fabric on the permeability,a three-dimensional permeability test was performed on a plurality of biaxial fabric preforms with different structures by a 3 D permeability test device integrated by image acquisition system and resin flow simulation software.The effects of suture structure and density,fiber bundle fineness,binder coating and other parameters of the biaxial fabric on permeability were analyzed by comparing the variations of in-plane and thickness directions permeabilities.The experimental results show that the in-plane permeability of the fabric with suture structure is lower than that of the automated fiber placement fabric,and the permeability in the thickness direction is much higher than that of the automated fiber placement fabric.Compared with the woven fabric,the warp knitted fabric has a higher in-plane permeability;and the variation of in-plane permeability caused by the variation of the fineness of the fiber bundle in the warp knitted fabric is closely related to the tow compression states.For the fabric with binder surface,the in-plane permeability is reduced while the permeability in the thickness direction is greatly improved.
作者
耿奕
蒋金华
陈南梁
GENG Yi;JIANG Jin-hua;CHEN Nan-liang(Engineering Research Center of Textile Technical Education Ministry,Shanghai 201620,China;College of Textile,Donghua University,Shanghai 201620,China)
出处
《复合材料科学与工程》
CAS
北大核心
2020年第3期11-17,共7页
Composites Science and Engineering
基金
国家自然科学基金项目(11472077)
国家重点研发计划项目(2016YFB0303300)。
关键词
液体模塑工艺
纤维增强复合材料
渗透率
双轴向经编织物
liquid composite molding(LCM)
fiber reinforced composite
permeability
bi-axial warp knitting fabric
