Simulations of Machining Processes at Small …
247
Fig. 2 Comparison of experimental and numerical stress–strain behaviour under compression for
different orientations
Table 1 Material parameters
of single-crystal copper
Parameter
Meaning
Value
Unit
˙
γ 0
Reference shear rate
0.001
s −1
n
Rate-sensitivity parameter
50
–
τ 0
Initial slip resistance
4.0
MPa
τ s
Saturated slip resistance
52
MPa
h 0
Initial hardening modulus
180
MPa
h s
Saturated hardening modulus
24
MPa
q
Latent hardening ratio
1.2
–
Fig. 3 Comparison of velocity (a) and displacement (b) of cutting tool for CM and UAM
simulations for V 0 = 2.0 mm/ms
247
Fig. 2 Comparison of experimental and numerical stress–strain behaviour under compression for
different orientations
Table 1 Material parameters
of single-crystal copper
Parameter
Meaning
Value
Unit
˙
γ 0
Reference shear rate
0.001
s −1
n
Rate-sensitivity parameter
50
–
τ 0
Initial slip resistance
4.0
MPa
τ s
Saturated slip resistance
52
MPa
h 0
Initial hardening modulus
180
MPa
h s
Saturated hardening modulus
24
MPa
q
Latent hardening ratio
1.2
–
Fig. 3 Comparison of velocity (a) and displacement (b) of cutting tool for CM and UAM
simulations for V 0 = 2.0 mm/ms