Parameter	Definition	Units
a	Chip thickness	mm
a0	Undeformed chip thickness	mm
A	Initial yield stress	MPa
AX	Amplitude of vibration in x-axis	μm
AY	Amplitude of vibration in y-axis	μm
α	Main shear zone	-
αT	Coefficient of thermal deformation	°C−1
b	Shear band thickness	mm
B	Hardening constant	MPa
β	Angular mismatch	Rad
C	Strain rate coefficient	-
CP	Specific heat	J/kg·°C
D	Density	kg/m3
E	Elastic modulus	GPa
$\acute{\epsilon }$	Strain rate	s−1
${\acute{\epsilon }}_0$	Initial strain rate	s−1
f	Cutting feed	mm/rev
f0	Vibration frequency	kHz
FC	Cutting force	N
$\xi$	Compression ratio	-
Li	Length of segment	mm
m	Coefficient of thermal softening	-
n	Coefficient of strain hardening	-
NC	Cutting power consumption	W
QW	Material removal rate	mm3/s
RSCE	Relative specific cutting energy	-
SCE	Specific cutting energy	W∙s/mm3
Tmelt	Melting temperature	°C
Troom	Room temperature	°C
Vc	Cutting speed	m/min
Vi	Normal component of the speed of each segment	mm/s
Vo	Output chip velocity	m/min
$\varphi$	Shear plane angle	°