【作者】 李典森； 卢子兴； 冯志海；

【Author】 LI Diansen~1,LU Zixing~1,FENG Zhihai~2 (1 School of Aeronautics Science and Technology,Beijing University of Aeronautics and Astronautics,Beijing 100083 2 Institute of Space Material Technology,Beijing 100076)

【机构】 北京航空航天大学航空科学与工程学院； 航天材料工艺研究所；

【摘要】 本文利用分离式霍布金森压杆技术(SHPB技术),对不同编织角、不同纤维体积含量的碳/酚醛三维编织复合材料进行了沿编织方向的动态压缩实验,研究了这类材料在高应变率下的力学性能。实验结果表明,三维编织复合材料具有较明显的应变率强化效应和动态软化现象;随应变率的增加,材料的峰值应力、破坏应变均相应地提高,但材料的动态压缩模量变化不大。更多还原

【Abstract】 The longitudinal(braiding direction) dynamic compression experiments have been performed on the carbon/phenolic 3D braided composites with different braiding angle and fiber volume fraction by SHPB system.The longitudinal compression properties of this material were investigated under different strain rates.The results show that the material has strain rate and damage-softening effects.The maximum stress and failure strain of composites depend on strain rate,but the dynamic compression modulus change little.更多还原