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所属单位：能源与动力学院

发表刊物：COMPOSITE STRUCTURES

关键字：2.5D woven composites Mechanical behaviors Damage and failure mechanisms Numerical model Temperature

摘要：An angle-interlock 2.5D woven composites (2.5D-WC), as a man-made new structural layout in the family of woven composites, have recently attracted increasing interest in its promising applications in the fields of astronautics and aeronautics. Nevertheless, published results are rarely associated with the temperature-dependent mechanical behaviors of this material. The current work emphasizes on the evaluation of the thermo-mechanical behaviors, damage propagation and failure mechanisms of 2.5D-WC at ambient and un-ambient temperatures by using experimental and numerical approaches. Experimental results show warp mechanical modulus and strength experience a decrease trend when the temperature increases. However, the weft strength is not sensitive to temperature, giving an indication of anisotropic behavior. There is no necking phenomenon near the fracture surface regardless of temperature and loading direction, indicating a brittle fracture mode. Temperature and fiber yarn arrangement direction play a critical role in alternating the damage propagation and failure mechanisms. Additionally, simulation results quantitatively elaborate the corresponding experimental findings and proposed mechanisms, which can be used to evaluate the temperature-dependent mechanical behaviors of 2.5D-WC. Ultimately, we hope these findings could further promote the engineering applications of 2.5D-WC, especially in aero-engine fields.

ISSN号：0263-8223

是否译文：否

发表时间：2018-10-01

合写作者：宋健,崔海涛

通讯作者：温卫东