Effect of Fibres on the Failure Mechanism of Composite Tubes under Low-Velocity Impact
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Fabrication of Composite Tubes by Wet-Filament Winding
2.3. Low-Velocity Impact Tests
2.4. Damage Characterization
2.5. Radial Residual Compression Strength Test
2.6. Scanning Electron Microscopy (SEM) Characterization
3. Results and Discussion
3.1. Low-Velocity Impact Response
3.2. Low-Velocity Impact Damage Characterisation
3.3. Radial Compression after Impact Response and Behaviour
4. Conclusions
- Delamination and fibre breakage damage are the main failure mechanisms of FRP tubes when subjected to LVI. The damage degree depends on the interfacial adhesion between the fibres and resins, and the mechanical properties of the tubes. Global fibre breakage damage occurs in the CFRP-T800 and CFRP-T700 tubes, while localized fibre breakage occurs in the BFRP and GFRP tubes.
- The residual deformation ratios of the composite tubes show the following trend: GFRP tube > CFRP tubes > BFRP tube—the same as the percentages of energy absorption. The residual deformation ratio and the energy absorption percentage of CFRP-T700 and CFRP-T800 tubes differ little, which related to their mechanical properties. The GFRP tube absorbs the most energy through delamination and large deformation, which shows the best impact resistance. The BFRP tube absorbs the lowest energy, mainly by delamination, which shows the poorest impact resistance.
- LVI has a considerable influence on the R-RCS of composite tubes. The retention rates of R-RSC of the four tubes are 88.1%, 90.7%, 97.3%, and 73.8%. The BFRP tube is not sensitive to impact, and the GFRP tube is highly sensitive to impact.
Author Contributions
Funding
Conflicts of Interest
References
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Types | Tensile Strength (MPa) | Tensile Modulus (GPa) | Elongation at Break (%) |
---|---|---|---|
Carbon fibre-T800 | 5880 | 294 | 1.9 |
Carbon fibre-T700 | 4900 | 230 | 2.1 |
Basalt fibre | 3500 | 100 | 3.2 |
Glass fibre | 2800 | 86 | 4.8 |
Materials | Tensile Strength/MPa | Tensile Modulus/GPa | Poisson’s Ratio | Shear Strength/MPa | Density/g·cm3 |
---|---|---|---|---|---|
CFRP-T800 | 1336.1 (1) | 137.9 (1) | 0.26 (12) | 56.4 (12) | 1.43 |
CFRP-T700 | 1263.2 (1) | 128.7 (1) | 0.27 (12) | 57.01 (12) | 1.61 |
BFRP | 648.3 (1) | 50.2 (1) | 0.30 (12) | 55.64 (12) | 1.93 |
GFRP | 793.2 (1) | 43.7 (1) | 0.28 (12) | 57.30 (12) | 1.90 |
Types | Failure Mechanism | Residual Deformation Ratio (%) | r (Percentage of Energy Absorption, %) |
---|---|---|---|
CFRP-T800 | Global fibre breakage and delamination damage | 20.4 | 72.7 |
CFRP-T700 | Global fibre breakage and delamination damage | 20.5 | 73.7 |
BFRP | Localized fibre breakage and delamination damage | 20.0 | 67.1 |
GFRP | Localized fibre breakage and delamination damage | 32.0 | 75.7 |
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Xiao, J.; Shi, H.; Tao, L.; Qi, L.; Min, W.; Zhang, H.; Yu, M.; Sun, Z. Effect of Fibres on the Failure Mechanism of Composite Tubes under Low-Velocity Impact. Materials 2020, 13, 4143. https://doi.org/10.3390/ma13184143
Xiao J, Shi H, Tao L, Qi L, Min W, Zhang H, Yu M, Sun Z. Effect of Fibres on the Failure Mechanism of Composite Tubes under Low-Velocity Impact. Materials. 2020; 13(18):4143. https://doi.org/10.3390/ma13184143
Chicago/Turabian StyleXiao, Jie, Han Shi, Lei Tao, Liangliang Qi, Wei Min, Hui Zhang, Muhuo Yu, and Zeyu Sun. 2020. "Effect of Fibres on the Failure Mechanism of Composite Tubes under Low-Velocity Impact" Materials 13, no. 18: 4143. https://doi.org/10.3390/ma13184143