Biomedical Engineering Reference
In-Depth Information
Fig. 8.36
Finite element analysis of plaque models at two-dimensional cross-sections and with
different fibrous cap thickness and calcification gap. Peak principal stress and deformation
plots pertain to a constant lipid pool (
E
lp
= 1 kPa
) of fixed thickness (
0�35 mm
), and with vary-
ing fibrous cap thickness
d
fc
and calcification gap
d
cg
.
a
: For
d
fc
= 0.05 mm, the critical stress
σ
cr
and maximum deformation
D
max
are 331 kPa and 0.390 mm respectively.
b
: For
d
fc
= 0.48 mm,
σ
cr
= 28.7 kPa and
D
max
= 0.0281 mm. The geometrical outlines of the plaque composites for
a
and
b
show the structural difference in the deformed plaque due to applied stress.
c
: For
d
cg
= 0.02 mm
and
d
fc
= 0.05 mm,
σ
cr
= 282 kPa and
D
max
= 0.290 mm.
d
: For
d
cg
= 0.175 mm and
d
fc
= 0.05 mm,
σ
cr
= 326 kPa and
D
max
= 0.370 mm
Results for plaque models at 70 % and 90 % stenosis and with a constant lipid
pool (
E
lp
= 1 kPa) are illustrated by Fig.
8.36a
and
b
. Analysis of the different plaque
models with lipid cores of fixed size (0.35 mm) shows the effect of fibrous cap
thickness
d
fc
on maximum principle stress and deformation. Multiple numerical
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