Constitutive Equations of Yield Stress Sensitivity to Strain Rate of Metals: A Comparative Study

Table 3

Material constants and errors obtained by the Huh-Kang equation.

Metal	(MPa)			Error (%)
Copper 105	50.0	0.0450	0.0398	41.4
Copper 26	120.5	0.0594	0.0177	20.9
Copper 9	221.6	0.0330	0.0088	15.3
Steel 293 K	132.9	0.0675	0.0058	5.3
Steel 493 K	88.9	0.0303	0.0076	9.8