%0 Journal Article
%T 二维C/SiC复合材料在冲击拉伸下的损伤过程<br>Fracture damage of two dimensional C/SiC composites under dynamic loading
%A 陈煊
%A 陈超
%A 程礼
%A 陈卫
%J 复合材料学报
%D 2017
%R 10.13801/j.cnki.fhclxb.20160606.002
%X 利用分离式霍普金森拉杆实验装置（SHTB）和超高速照相机，对二维C/SiC复合材料进行了冲击拉伸力学性能实验研究，同时结合其宏观力学行为，分析了在冲击拉伸载荷作用下的损伤破坏过程。结果表明：材料的应力-应变曲线呈明显的非线性特征，其内部损伤破坏和裂纹扩展过程分为四个阶段：损伤积累于第一阶段，裂纹起源于第二阶段，屈服失效于第三个阶段，快速扩展于第四个阶段。 The dynamic tensile properties of 2D C/SiC composites were investigated by means of Split Hopkinson Tensile Bar (SHTB) and ultra high-speed camera.Based on its macro mechanic behavior,the failure process of the specimen under dynamic tensile loading was analyzed.The experimental results indicate that the stress-strain curve is obviously non-linear,and examination of the failure process of the specimen helps define the four phases of crack propagation,namely,the damage accumulation phase,crack initiation phase,yield failure phase and crack fast spreading phase. 国家自然科学基金青年项目（11402302）；陕西省自然科学基金（2016JQ1031）；中国博士后科学基金（2016M592923）
%K C/SiC复合材料
%K 冲击拉伸
%K 霍普金森拉杆
%K 损伤过程
%K 超高速相机&lt
%K br&gt
%K C/SiC composite
%K impact tensile loading
%K SHTB
%K failure process
%K ultra high-speed camera
%U http://fhclxb.buaa.edu.cn/CN/abstract/abstract13557.shtml