Fig. 3.

Relationships between plastic strain and instantaneous strain of human cortical bone at three different orientations. Linear regression was fitted for experimental data: longitudinal direction (ε_p=0.459ε_i−0.00227, R²=0.95), circumferential direction (ε_p=0.412ε_i−0.00239, R²=0.93), and radial direction (ε_p=0.391ε_i−0.00175, R²=0.84).