Fig. 4.

Non-zero components of the stress tensor of the microporous hydroxyapatite polycrystal according to Eqs. (4) and (9), for varying bone tissue volume fraction $f_{\text{bone}}^{\text{congl}}$, and under physiologically relevant macroscopic stress according to Eq. (5), with ${\mathrm{\Sigma }}_{\text{congl},11}=-10$MPa