Investigation of energy and fracture modes of nanocomposites reinforced with real carbon nanotubes

Subject Areas : Creep, Fatigue and Fracture Mechanic

shahrbanoo hamedi ¹ , Mansoor Fotohyan ² , mahdiye hamedi ³

1 - university
2 - university
3 - university

Received: 2019-10-12 Accepted : 2020-02-11 Published : 2020-02-20

Keywords: nanocomposite, Fracture energy, Transmission Electron Microscopy, Fracture modes,

Abstract :

In this paper, the effect of carbon nanotubes on the fracture energy, first and second modes of nanocomposite is investigated. For this purpose, a nanocomposite with 0.5 wt.% Carbon nanotubes was made experimentally in the laboratory. Using an ultramicrotome technique, cutting the nanocomposite sample and prepared it for transmission electron microscopy (TEM). Then, the diameter, length, and curvature of the carbon nanotubes were determined by transmission electron microscopy (TEM). The XFEM method investigated the crack growth in nanocomposites. Using SEM images and equations, the nanocomposite fracture energy was obtained. The results showed that by increasing the weight percentage of carbon nanotubes to the matrix, the stress intensity factor increased. Also, the fracture energy of the nanocomposite reinforced with 0.5 weight percent of carbon nanotubes increased by 29.6% compared to the matrix. The results were compared with the numerical and experimental results and were in good agreement with each other.