树脂基三维机织复合材料结构与力学性能的关系研究

通过拉伸、弯曲、压缩等实验,评价了4种不同结构的三维机织角联锁织物增强的碳/树脂基复合材料结构与力学性能的关系.结果表明:对于纤维体积含量相近的4种不同结构的3D机织复合材料而言,它们之间的拉伸、弯曲、压缩性能差异很大,在2倍左右;衬经纱和衬纬纱可以显著改善力学性能;纤维与树脂之间的界面破坏-脱粘是3D机织复合材料最先发生失效的形式;带衬经衬纬的No.1结构复合材料的综合力学性能最佳.可以推断,改进界面结合力能大大提高3D机织复合材料的力学性能.

Study of Relationship between Structures and Mechanical Properties of Three-Dimensional Angle-Interlock Woven Carbon/Resin Composites

The paper investigated the mechanical properties of three-dimensional angle-interlock woven carbon/resin composites,which have four different kinds of weave structures.3D woven composites with different structures were designed and produced,and their mechanical properties were assessed using tension,bend and compression tests.Results show that the differences of tension,bend and compression properties are great,around 2 times;stuffer warp and stuffer weft improve mechanical properties notably;interphase breakage between fiber and resin is the first failure mode of 3D woven composites;No.1 composites with stuffer warp and stuffer weft has the best mechanical properties among the four different kinds of structures composite.Finally it is predicted that improving interphase binding energy must increases mechanical properties.