High-velocity impact behaviors and post-impact tension performance of 2D-C/SiC composite beams
| Autor: | Chao Zhang, Tao Suo, Bo Wang, Wei Hu, Tianhao Guan, Mengting Gao, Jinzi Huang, Tengfei Ren |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Digital image correlation Materials science Tension (physics) Process Chemistry and Technology Phase (waves) 02 engineering and technology 021001 nanoscience & nanotechnology Residual 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Acoustic emission 0103 physical sciences Materials Chemistry Ceramics and Composites Fracture (geology) Fiber Composite material 0210 nano-technology Beam (structure) |
| Zdroj: | Ceramics International. 46:13282-13291 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.02.106 |
| Popis: | 2D-C/SiC composites have widely been used in aeronautical and aerospace engineering, but their mechanical behaviors under small-mass and high-speed impact have not been thoroughly studied yet. In this paper, 2D-C/SiC beam specimens were impacted by a single-stage light-gas gun and the fracture processes were captured by a high-speed camera. Post-impact internal and surface damage morphologies were scanned by a CT and a SEM, respectively. Similar damage modes were revealed by high-speed images. Subsequently, quasi-static post-impact tension tests were conducted to understand the residual mechanical properties. Acoustic emission (AE) signals of specimens were detected during the tests and then classified by the K-means algorithm. Therefore, evolutions of matrix damage, interfacial delamination and fiber fracture were recognized. At the same time, strain value was obtained by digital image correlation (DIC) method and main crack propagations were obvious in strain contours. A combination of the AE and DIC methods very well monitored the real-time damage during post-impact testing, which further revealed the damage during impact phase. |
| Databáze: | OpenAIRE |
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