Journal
COMPOSITES PART B-ENGINEERING
Volume 56, Issue -, Pages 647-659Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.08.068
Keywords
3-Dimensional reinforcement; Mechanical properties; Electron microscopy; Braiding
Funding
- National Natural Science Foundation of China [10902058]
- Beijing Municipal Natural Science Foundation [2122034]
- Foundation of Key Laboratory of Cryogenics
- TIPC
- Chinese Academy of Sciences
- Fundamental Research Funds for the Central Universities
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The compressive experiments on the 3D braided composites with different braiding parameters are performed in three directions (longitudinal, in-plane and transverse) at room and liquid nitrogen temperature (low as -196 degrees C). Macro-Fracture morphology and SEM micrographs are examined to understand the deformation and failure mechanism. The results show that the stress-strain curves and the compression properties are significantly different in the longitudinal, in-plane and transverse direction. Meanwhile, the compression properties at liquid nitrogen temperature are improved significantly than that at room temperature. Moreover, the damage and failure patterns of composites vary with the loading directions and test temperature. At liquid nitrogen temperature, the brittle failure feature becomes more obvious and the interfacial adhesion capacity is enhanced significantly. In addition, the compressive properties and failure mechanism at room and liquid nitrogen temperature can be significantly affected by the braiding angle and the fiber volume fraction. (C) 2013 Elsevier Ltd. All rights reserved.
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