Experimental investigation of mechanical and modal properties of Al2O3 nanoparticle reinforced polyurethane core sandwich structures
| Autor: | Hatice Bayrakçeken, Tayyab Khan, M. Özgür Seydibeyoğlu, Onur Ahmet Aydın, Volkan Acar, Burak Hülagü, Hamit Akbulut, Muhammet Raci Aydın |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number Context (language use) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Compression (physics) Microstructure 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Buckling chemistry Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium General Materials Science Ceramic Composite material 0210 nano-technology Reinforcement Polyurethane |
| Zdroj: | Materials Today Communications. 24:101233 |
| ISSN: | 2352-4928 |
| DOI: | 10.1016/j.mtcomm.2020.101233 |
| Popis: | In this study, experimental mechanical and modal analyses of nano-Al2O3 ceramic powder reinforced polyurethane foam core sandwich composites was carried out along with the investigation of vibration, buckling and compression responses. The reinforcement ratio of Al2O3 ceramic powder was varied from 0 to 10 % by weight. The morphological effect of Al2O3 powder reinforcement on the polyurethane microstructure was also investigated by benefitting from an optical microscope. Significant improvements in the damping response and the buckling behavior of the Al2O3 sandwich specimens were observed. In this context, a 38.3 % increase in the damping ratio was observed for 2% Al2O3 reinforced specimens compared to the neat specimens and the specimens with 1% and 3% Al2O3 reinforcement showed 31.4 % and 26.8 % increase, respectively. Similarly, a 6% increase in the buckling peak load was observed for specimens with 5% reinforcement compared to the neat specimens. However, the compression peak load was observed to decrease linearly with an increase in the reinforcement ratio for all the reinforced specimens. TG-DTG, DSC and FTIR analysis of PUF cores with different reinforcement ratios were also performed within the scope of this study. It was observed in the TG graphs that the weight loss decreased with an increase in the reinforcement ratios. The glass transition temperatures of all the PUF core specimens were found by performing DSC analyses whereas, the structural bonds were detected by using the FTIR technique. Composite foam cores showed the existence of a dominant polyurethane structure. |
| Databáze: | OpenAIRE |
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