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Experimental Study of Mass Ratio and Carbon Nono Tube Size on Impact Toughness in Composite Polymers

Salmani Givi, Foad | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48682 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Hosseini Kordkheili, Ali
  7. Abstract:
  8. Nowadays, composites have wide applications in different industries especially in aerospace industry because of their high strength to weight ratio. Epoxy 5052 for its relatively good mechanical properties and high thermal resistance has vaidly use for manufacturing of large composite components. However; fracture toghness of epoxy resins is not good in comparison to their other exceptional properties. Therefore, researchers have endeavored to improve this characteristic with different approaches. One of these methods is nanotechnology. Since the components in aerospace industry are often under impact loads and impact strength of these materials has been less studied, effect of carbon nano-tubes on epoxy 50-52 is investigated in this research. These nano particles have better effects on fracture strength improvement in nano composites. For this purpose, nano composites samples with three types of nano tubes with different diameters and weigh ratio has been built and tested to find their impact strength. Effect of nano particle dimensions on nano composite behavior has been investigated and the optimal weight ratio for highest toughness has been obtained. Finally, with comparison of results with previous researches and investigation of electronic microscope images of fracture surface, the accuracy of results can be ensured Finding a suitable way for combination of nanoparticles and polymer, creating a strong intersection between them, and to eliminate the stress concentration is also investigated in this research
  9. Keywords:
  10. Carbon Nanotubes ; Fracture Toughness ; Nanocomposite ; Epoxy Resins ; Scanning Electron Microscopy (SEM) ; Charpy Impact Energy ; Size Effect

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