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. 2017 Jun 11;10(6):640. doi: 10.3390/ma10060640
Symbol Description
cp Specific heat [J/kg·K]
d Layer height [μm]
df Fiber diameter [μm]
E Scaffold stiffness [MPa]
f Filament feed speed [mm/min]
{f} Load vector
g Strand stepover [μm]
gp Pore size [μm]
k Thermal conductivity [W/m·K]
[Ke] Stiffness matrix
[Me] Mass matrix
q˙ Heat flux [W/m2]
Qelp Flow rate [mL/h]
s Overlap [μm]
T Temperature [°C]
Tc Cooling system temperature [°C]
Te Deposition temperature [°C]
t Time [s]
tp Overall processing time [min]
v Axis linear speed [mm/min]
Velp Voltage [kV]
Π Apparent macroporosity [%]
ρ Density [g/cm3]
ρm Apparent density [g/cm3]
ρs Bulk density of the polymer strand [g/cm3]
σy Yield strength [MPa]
ϕ Diameter of a polymeric strand [μm]
ω Crank–Nicholson factor