Ana lysis of th e effect of chirality on stress intensity factor of e poxy/SWC NT based on multi-sca le method

Carbon nanotube (CNT) is considered as a new generation of material possessing su perior mecha nical, ther al and ele ctrical properties. Recent investigations [۱,۲] have show n that CNTs when align ed perpendiculars to cracks are able to slow down the crack growth by bridging up the crack faces. In this research a multi-scale analysis and fin ite element (FE) method are proposed to study the interaction of nanotubes and matrix at the nano-scale near a crack tip. Openin g mode for bridging co ndition (SWCNT is orth ogonal to crack and cr ack is in mid dle of representative volume elemen t RVE) with epoxy/SW CNT ۰.۱% wt is consi dered. The e ffect of the chirality of a rmchair an d zig-zag sin gle walled carbon nanotubes (SWC NTs) in a polymer mat rix in prese nce of van d er Waals ( vdW) interaction as inte rphase region on the fra cture behav ior were st udied. It was found that the chirality has a significant effe ct on stress intensity fac tor of nano composites.

کلیدواژه ها:

Carbo n nanotube ، Nanocomposite ، Stress intensity factor ، Multi-s cale.