Split Hopkinson pressure bar testing of 3D multi-axial warp knitted carbon/epoxy composites

被引:24
|
作者
Li, Dian-sen [1 ,2 ]
Chen, Hao-ran [2 ]
Ge, Dong-yun [3 ]
Jiang, Nan [4 ]
Jiang, Lei [1 ]
机构
[1] Beijing Univ Aeronaut & Astronaut, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing Key Lab Bioinspired Energy Mat & Devices, Minist Educ,Sch Chem & Environm, Beijing 100191, Peoples R China
[2] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116023, Peoples R China
[3] Tsinghua Univ, Sch Aerosp, AFM, Beijing 100084, Peoples R China
[4] China Acad Machinery Sci & Technol, Beijing 100044, Peoples R China
基金
中国国家自然科学基金;
关键词
3-Dimensional reinforcement; Mechanical properties; Mechanical testing; Braiding; LIQUID-NITROGEN TEMPERATURE; NON-CRIMP FABRICS; FAILURE-MECHANISM; REINFORCED COMPOSITES; WOVEN COMPOSITES; MWK COMPOSITES; DAMAGE; IMPACT; TENSION; BEHAVIOR;
D O I
10.1016/j.compositesb.2015.04.045
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
High-strain-rate compression experiments were performed on 3D MWK carbon/epoxy composites with different fiber architectures at room and elevated temperature using an SHPB apparatus. Macro-fracture and SEM micrographs were examined to understand the failure mechanism. The results show the dynamic properties increase with the strain rate and show a high-strain-rate sensitivity. Meanwhile, composites with [0 degrees/0 degrees/0 degrees/0 degrees] have higher properties. Moreover, composites show temperature sensitivity and the properties decrease significantly, especially for composites with [0 degrees/90 degrees/+45 degrees/-45 degrees]. The results also indicate composites take on more serious damage and failure with the strain rate. The failure of composites with [0 degrees/0 degrees/0 degrees/0 degrees] behaves in multiple delaminating, overall expansion and 0 degrees fibers tearing. While that of composites with [0 degrees/90 degrees/+45 degrees/-45 degrees] is mainly interlaminar delaminating, local fibers tearing and fracture on different fiber layers. In addition, with increasing the temperature, the composite shows less fracture and becomes more plastic. The damage of matrix yielding, interface debonding and twisting of fibers increase significantly. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:692 / 705
页数:14
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