Mechanical Properties of Thin-Ply Composites Based on Acoustic Emission Technology
| Autor: | Kai-dong Zheng, Yun-dong Ji, Dongfeng Cao, Hai-xiao Hu, Shuxin Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Scanning electron microscope characteristic frequency Uniaxial tension Stacking 02 engineering and technology failure modes lcsh:Technology Article Total thickness Matrix (mathematics) 0203 mechanical engineering General Materials Science Fiber Composite material lcsh:Microscopy lcsh:QC120-168.85 lcsh:QH201-278.5 lcsh:T Fracture mechanics 021001 nanoscience & nanotechnology thin-ply laminate 020303 mechanical engineering & transports Acoustic emission lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology acoustic emission lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 |
| Zdroj: | Materials, Vol 14, Iss 913, p 913 (2021) Materials Volume 14 Issue 4 |
| ISSN: | 1996-1944 |
| Popis: | Compared with standard-ply composites, thin-ply composites exhibit a superior mechanical performance under various operating conditions due to their positive size effects. Thin-ply laminate failure modes, including matrix initial damage (MID), matrix failure (MF), and fiber failure (FF), have been distinguished through a systematic acoustic emission (AE) signals analysis combined with scanning electron microscopy (SEM). First, the characteristic frequencies of various failure modes are identified based on unidirectional laminates ([90] 68 and [0] 68). Then, according to the identified frequencies corresponding to distinctive damage modes, four lay-up sequences (02[[90m/0m]ns]02, m = 1, 2, 4, 8, n × m = 16) with a constant total thickness are designed, and the effects of the number of identical plies in the laminate thickness on the damage evolution characteristics and the damage process under uniaxial tension loads are dynamically monitored. The obtained results indicate that the characteristic frequency ranges for MID, MF, and FF are identified as 0–85 kHz, 165–260 kHz, and 261–304 kHz, respectively. The thickness of identical plies has a significant effect on onset damage. With the decrease of the number of identical plies (i.e., m in the stacking sequences), the thin-ply laminates exhibit the initiation of damage suppression effects and crack propagation resistance. |
| Databáze: | OpenAIRE |
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