ISF	Incremental sheet forming
CNC	Computerized numerical control
PP	Polypropylene
H_PP	Hemp fiber-reinforced polypropylene composites
F_PP	Flax fiber-reinforced polypropylene composites
t	Laminate thickness
SPIF	Single-point incremental forming
CAD	Computer-aided design
R	Base radius of the cones
h	Height of the cones
α	Wall angle of the cones
hf	Height at the potential point of failure of the cones
a	Base radius of the spherical caps
θ	Polar angle of the spherical caps
hs	Vertical distance covered after one complete turn of the toolpaths
θs	Angular distance covered after one complete turn of the toolpaths
v	Nominal toolpath speed
FX	Module of the forming force along the X axis
FY	Module of the forming force along the Y axis
FZ	Module of the forming force along the Z axis
FXY	Module of the forming force acting in the XY plane
FTOT	Module of the total forming force
MZ	Module of the moment around the Z axis
A	Current radius of the spiral toolpath
B	Absolute value of the ratio between MZ and FXY
PTOT	Total power
PXY	Power associated with FXY
PZ	Power associated with FZ
vZ,m	Mean value of the speed along the Z axis
vXY	Speed in the XY plane
vZ	Speed along the Z axis
ETOT	Total energy
EXY	Energy associated with FXY
EZ	Energy associated with FZ