چكيده به لاتين
Abstract
The aim of the current research is to conduct an experimental study on the effect of
nanodiamond particles on the fracture behavior of the nanocomposites which are under
the out of plane shear loading. After reviewing the previous researches, it became
evident that there are only a few works done on the subject of fracture as a result of
out of plane loading, especially in cases of mode III and mixed mode loading
conditions. Also the use of nanodiamond particles, the effect of which is studied in the
current research, is rarely considered in the current literature.
In this research, the effect of adding a 0.1% wt of nanodiamond particles on the
fracture toughness of the pure resin is studied. The considered loading modes include
pure mode I, pure mode III, and mixed mode of I and III. Fracture toughness is
achieved by means of finite element modeling.
Gathered results display a small increase in fracture toughness as a result of adding
nanodiamond particles in case of mode I loading. This enhancement however, reaches
a significant amount in case of mixed mode I/III loading, but results in a considerable
decrease of fracture toughness under mode III loading. Obtained results are compared
to the results of a relevant research which has invistegated effects of MWCNT on
fracture behavior of nanocomposites.
Well known reinforcement mechanisms are reviewed and are discussed with focus
on the effect of nanodiamond. In order to obtain a better understanding of the pertinent
mechanisms, fracture surface of the samples is studied, using the optical microscope
and scanning electron microscope.
Keywords: nanocomposite, nanodiamond, fracture toughness, out of plane shearing
load. Mode III fracture
