摘要
针对不同编织角、不同纤维体积分数的三维五向炭纤维/酚醛编织复合材料在不同温度下进行了纵向(编织方向)压缩和横向压缩试验,获得了其主要压缩力学性能,分析了编织参数、温度对材料压缩力学性能的影响。对试件断口进行了宏观及扫描电镜观察,从宏、细观角度研究了材料的变形及其破坏机制。结果表明,三维五向炭纤维/酚醛编织复合材料的压缩应力-应变曲线呈现明显的非线性特征,且温度效应明显;编织角和纤维体积分数是影响材料压缩性能的主要参数。三维五向炭纤维/酚醛编织复合材料的纵向压缩与横向压缩具有完全不同的破坏机制。
The compressive experiments were performed for the three dimensional and five directional carbon fiber/ phenolic braided composites with different braiding angles and fiber volume fractions in the longitudinal （braiding） direction and transverse direction at different temperatures. The principal compressive properties of the composites were obtained. The influences of braiding parameters and temperature on the compressive properties were also analyzed. The macro and micro pictures of the fracture surface of specimens were observed in order to understand the deformation and the failure mechanism of the composites. The results show that the compressive stress-strain curves of 3D ＆ 5D carbon fiber/phenolic braided composites exhibit the nonlinear characteristics and the effects of temperature are apparent. The braiding angle and the fiber volume fraction still were the most important parameters to affect the compressive properties of the composites. The longitudinal compressive failure of the composites is very different from the transverse compressive failure.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2008年第1期133-139,共7页
Acta Materiae Compositae Sinica
基金
航空科学基金(04B51045)
北京市教育委员会共建项目建设计划(XK100060522)
北航博士创新基金
关键词
三维五向编织
复合材料
压缩
破坏机理
炭纤维/酚醛
3D ＆ SD braiding
eomoosites
comoression
failure mechanism
carbon fiber/phenolic
