Аннотации:
This study was conducted with the aim of improving fiber-metal laminates (FMLs) by
strengthening the interface between layers using 2D materials such as the ɑ-Zirconium
phosphate (ɑ-ZrP). The importance of this topic is emphasized by an analysis of the
literature, which reveals a gap in research in the field of application of ɑ-ZrP
nanomaterials. Even though ɑ-ZrP was discovered and synthesized a long time ago,
there is a lack of studies in using it as a reinforcement for fiber metal laminates. To
achieve this goal a research were conducted to synthesize and characterize ɑ-ZrP
nanoparticles. Then some experiments were performed to find the best composition of
the polymer starting from 0 wt% to 2 wt% of these nanoparticles by using the
commercial polyurethane. Several single lap joint samples using the aluminum sheets
were made and additionally pure polyurethane polymers were examined for the extra
information about the adhesive layer. Mechanical and electrochemical treatments were
implemented for the improvement of the interlocking mechanism between the metal
and adhesive polymer. In addition, the synergetic effect of their combination with
nanoparticles was studied. The behavior of the composite was studied using different
testing types such as the single lap shear strength test and tensile strength test for pure
polyurethane as well as it was analyzed by the Finite Element Analysis (FEA) using the
ABAQUS software. Ultimate tensile strengths were determined for the comparison of
the experimental and numerical parts’ results and the best concentration for the pure
polymer was found to be 1.0 wt% of ɑ-ZrP with 3.5 times enhanced tensile strength,
while for single lap joints it was 0.5 wt% which increased the shear strength by 91.8%.
Mechanical treatment by itself significantly increases the shear strength of lap joints by
35%, although it reduces efficiency in combination with nanoparticles. Conversely,
electrochemical treatment, especially combined with nano reinforcement showed
superior performance in terms of increase of the shear strength by 174% compared to
all other treatments. Although the combination of nanoparticles with both treatments
provided a slight increase in strength by 18.9%, this did not correspond to the
significant increase achieved by electrochemical treatment. The initial hypothesis was
proved and supported with numerical modeling