Notch-sensitivity of hybrid carbon-fibre/self-reinforced polypropylene composites
| Autor: | Takuya Karaki, Noriyuki Hirano, Marina Selezneva, Yentl Swolfs, Ichiro Taketa, Larissa Gorbatikh, Ignace Verpoest, A. Nijs |
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| Rok vydání: | 2020 |
| Předmět: |
Technology
Toughness Notch Materials science Materials Science Composite number Damage tolerance FIBER GLASS 02 engineering and technology 010402 general chemistry 01 natural sciences Sensitivity (explosives) MECHANISMS chemistry.chemical_compound Brittleness Fragmentation medicine Hybrid composites TENSILE-STRENGTH Composite material Ductility Polypropylene Science & Technology Polypropylene composites General Engineering Stiffness PERFORMANCE 021001 nanoscience & nanotechnology FRACTURE 0104 chemical sciences Pseudo-ductility chemistry Materials Science Composites Ceramics and Composites medicine.symptom 0210 nano-technology HYBRIDIZATION BEHAVIOR |
| Zdroj: | Composites Science and Technology. 200:108422 |
| ISSN: | 0266-3538 |
| Popis: | Hybrid composites combining brittle and ductile reinforcing fibres can be designed to have pseudo-ductile behaviour by controlling their failure mechanisms. The recently developed carbon-fibre/self-reinforced polypropylene (SRPP) hybrids have demonstrated a unique combination of stiffness (7 GPa), toughness (>6% strain) and density (±1000 kg/m³). Here, the influence of a circular notch on their failure mechanisms is investigated. Discontinuous carbon-fibre/polypropylene composites retained 69% of the gross strength and 83% of the net strength. The strength retention of SRPP was highly influenced by the processing parameters, and a notch-insensitive composite could be produced. Pseudo-ductility was obtained even with the notched hybrids. Hybrids that do not achieve the optimal ductility, still exhibit high gross and net strength retentions and can be classified as notch-insensitive. These results illustrate the significant potential of this new hybrid composite for applications with notches or holes. |
| Databáze: | OpenAIRE |
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