期刊
COMPOSITE STRUCTURES
卷 220, 期 -, 页码 602-607出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2019.03.080
关键词
3-Dimensional reinforcement; Stitched composites; Mechanical properties; Failure mechanism
资金
- Excellent Young Scientist Foundation of NSFC [11522216]
- National Natural Science Foundation of China [11872087]
- Beijing Municipal Natural Science Foundation [2182033]
- Aeronautical Science Foundation of China [2016ZF51054]
- 111 Project [B14009]
- Project of the science and Technology Commission of Military Commission [17-163-12-ZT-004-002-01]
- Foundation of Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province [18kfgk01]
Three-dimensional (3D) stitched carbon/epoxy composites with no stitching fibers damage were fabricated successfully. The fracture toughness, high-temperature flexural response and failure mechanism of 3D stitched composites are reported. The results show fabricated 3D stitched composites with no stitching fibers damage have excellent Model II interlaminar fracture toughness and flexural properties. The temperature is an important parameter affecting the properties of composites and the measured flexural performance decreases with increasing the temperature. The composite exhibits brittle fracture feature, and the destruction is originates from matrix cracking, and a gradual process from compression and tension surface to the interior layers, while the stitching fibers can effectively prevent and change the cracks' propagation paths. Fiber/matrix interface debonding caused by elevated temperature is the main mechanism for material failure.
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