多层连接碳纤维纬编双轴向衬纱织物增强复合材料的层间剪切性能  

Shear Properties of Resin Composites Reinforced with Multilayer-connected Biaxial Weft Knitted Fabric of Carbon Fibers

作　　者：裴晓园[1,2] 尚博[1,3] 李嘉禄[1] 陈利[1] 丁刚[4,5] 

机构地区：[1]天津工业大学复合材料研究所教育部先进纺织复合材料重点实验室,天津300387 [2]天津工业大学材料科学与工程学院省部共建分离膜与膜过程国家重点实验室,天津300387 [3]航天神舟飞行器有限公司,天津300160 [4]天津工业大学纺织学院,天津300387 [5]天津广播电视大学,天津300191

出　　处：《材料研究学报》2015年第8期613-621,共9页Chinese Journal of Materials Research

基　　金：天津市科学技术基金项目11ZCKFSF00500;天津市应用基础与前沿技术研究计划13JCYBJC16800资助~~

摘　　要：研究了三层连接、四层连接、五层连接的碳纤维纬编双轴向多层衬纱织物增强复合材料在0°和90°方向的层间剪切性能,结果表明:随着纤维体积含量的增加其层间剪切强度提高。复合材料的层间剪切载荷-挠度曲线趋于线性变化,达到最大值后载荷突然下降,表现出脆性断裂的特征。层间剪切试样断口形貌的分析结果表明,增强体结构对复合材料的层间剪切性能有显著的影响,试样的剪切破坏形式是分层破坏,在各织物组之间产生的裂纹较多。Interlaminar shear properties along directions of 0 ° and 90° of resin composites rein- forced with multilayer-connected biaxial weft knitted（MBWK） fabrics of carbon fibers, were investigated by shear test. The test composites involve three, four and five layer-connected MBWK fabrics respectively. It was found that the shear strength increased with the increasing fiber volume fraction. The variation of the interlaminar shear load-deflection curves tended to be linear. When the load reached the maximum value the load-deflection curve dropped suddenly, and the composites showed brittle fracture. The analysis of fracture surface showed that the structure of reinforcement has significant effect on shear properties of MBWK fabrics reinforced composites. The shear failure mode of the composites was delaminating. Meanwhile, the cracking preferred mainly along the delaminating at the interface between the fabric groups.

关 键 词：复合材料 纬编双轴向多层衬纱织物 聚合物基复合材料 剪切性能 失效机理 

分 类 号：TB324[一般工业技术—材料科学与工程] TQ323[化学工程—合成树脂塑料工业]