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.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
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~~
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
composites, multilayered biaxial weft knitted fabric, polymer matrix composites, shear properties, failure mechanism
