Tensile
and Buckling of Prosthetic Pylon Made from Hybrid Composites
Materials |
Compared
to traditional prosthetic pylon materials (Aluminum, Titanium,
or Stainless steel.), composite prosthetic pylon materials are
used instead of metals. Vacuum bagging technique was adopted for
the preparation of specimens made of Poly methyl methacrylate
(PMMA) as matrix with constant Perlon layers and different
number of Hybrid (Carbon + Glass) fibers layers as reinforcement
materials at (±45º&0º/90º) orientation relative to applied load.
Also the finite element method (ANSYS-15) were used by create a
model of prosthetic pylon and applied compressive load at heel
strike step from gait cycle to known the critical buckling
stress. The experimental and numerical results shown that the
tensile strength, modulus of elasticity, and critical buckling
stress increases with increasing number of Hybrid fibers layers,
that equal to (145 MPa, 6.25 GPa, and 670 MPa) respectively, and
the percentage of increase in tensile strength, modulus of
elasticity, and critical buckling stress for specimen with three
Hybrid (Carbon + Glass) layers and Perlon layers in PMMA resin
compared with pure PMMA specimen was (302.7% , 300% & 257.22%)
respectively, at (0º/90º) fibers orientation relative to tensile
force |
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