摘要
通过一系列的实验、分析,客观地评价了4种不同结构碳/环氧3D层-层正交角联锁机织复合材料沿0°、30°、45°、60°、90°方向的拉伸、压缩、弯曲强度和模量。实验结果表明:三维机织角联锁复合材料属正交各向异性材料,各个方向的拉伸、压缩、弯曲强度和模量曲线呈枫叶形,具有明显的双主轴特性;4种不同结构复合材料的各向异性力学性能有差异,经向力学性能以带衬经的角联锁结构为最佳,而纬向力学性能以纬密大的角联锁结构为最佳;三维机织角联锁复合材料具有很强的性能可设计性,正确选择纤维原料、纤维细度、三维预制件的组织结构和各个纱线组分的排列密度,即可达到预期的性能指标要求。
On-axis and off-axis tensile, compress, bend properties of four kinds of different structural carbon/ epoxy 3D layer-to-layer orthogonal angle interlock woven composites along 0°, 30°, 45°, 60°, 90° directions are evaluated based on a series of experiment and analysis. The results show that 3D angle interlock woven composites belong to the orthogonal anisotropic material. The strength-direction and modulus-direction curves of tensile, compress and bend seem to be maple leafs, and are characterized by double major axis. There are some differences between these four kinds of different structures composites in mechanical anisotropic properties, and better composites with larger strength and modulus in the warp direction are the layer-to-layer angle interlock structures with stuffer warp, and, by contrast, better composites with larger strength and modulus in the weft direction are the layer-to-layer angle interlock structures with denser weft density. It is emphasized that predicted mechanical properties can be achieved if fiber kind, fiber size, preform structure and yarn density are chosen reasonably.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2006年第2期59-64,共6页
Acta Materiae Compositae Sinica
基金
天津市自然科学基金资助项目(023604811)
