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A Study of Mechanical Properties of
Polymethyl Methacrylate Polymer Reiforced by Silica (SiO2)
Particles |
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In this
research the mechanical properties of PMMA polymer reinforced by
ceramic particles (silica) has been investigated. Many tests are
performed on these composites. The effects of the particles size
and volume fraction on the mechanical properties which include:
ultimate tensile strength, elongation percentage, modulus of
elasticity, bending modulus, flexural strength, max. shear
stress, impact strength and fracture toughness were studied.
Statistical and mathematical analyses were used to the
processing of the experimental data. Mathematical models were
done which show the mechanical properties of composite materials
as a function of particles size and volume fraction. The results
had revealed that the values of modulus of elasticity,
elongation percentage, tensile strength, bending modulus andmax.
shear stress increase with the addition of SiO2 particles and
with the increase of the volume fraction of them and its reach
the maximum value at (12% vol.) and (25 mm) particles size. The
values of fracture toughness and impact energy decrease with
increase of volume fraction. Silica particles with small
particles size improved these properties more than that of large
particles size. |
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