Repeated healing of delamination damage in vascular composites by pressurized delivery of reactive agents
| Autor: | Scott R. White, Brett P. Krull, Nancy R. Sottos, Seth M. Lankford, Eric D. Wetzel, Jason F. Patrick, Isaac A. Freund, Kevin R. Hart |
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| Rok vydání: | 2017 |
| Předmět: |
Strain energy release rate
Materials science Delamination General Engineering 02 engineering and technology Fiber-reinforced composite Epoxy Fracture plane 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences visual_art Self-healing Ceramics and Composites visual_art.visual_art_medium Fracture (geology) Composite material 0210 nano-technology Confocal raman spectroscopy |
| Zdroj: | Composites Science and Technology. 151:1-9 |
| ISSN: | 0266-3538 |
| DOI: | 10.1016/j.compscitech.2017.07.027 |
| Popis: | Recurrent self-healing of fracture damage in fiber-reinforced composites was accomplished by incorporating internal vascular networks for repeated delivery of reactive liquid components to an internal delamination. Double cantilever beam specimens containing embedded microvascular channels were repeatedly fractured and healed by pumping individually sequestered epoxy and amine based healing agents to the fracture plane. The effect of various pumping parameters and component delivery ratios on in situ mixing of the healing agents and the resulting healing efficiency is reported. Confocal Raman spectroscopy was used to quantify the extent of mixing of healing agents within the fracture plane. Using an optimized healing agent delivery scheme, ten cycles of fracture and healing were achieved with, on average, 55% and as high as 95%, recovery of the virgin critical strain energy release rate. |
| Databáze: | OpenAIRE |
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