Fig 1.
Scheme of obtainment process of cortical bone specimen.
Table 1.
The dimensions of the cortical bone specimen.
Fig 2.
In-situ testing system of mechanical property of materials under multiple load patterns.
Table 2.
The coefficient of the rectangle specimen under torsion load.
Fig 3.
Variations of shear modulus and torsion strength with different compression load.
Fig 4.
Principal strain contour of bone specimen under the compression-torsion coupling loads in different fracture stage (The distribution of the color of the strain contour was related to the spraying quality of the speckle, without affecting the revealing of the strain evolution mechanism.
1, 3, 4, 6, 7, 9, 10, and 12 are edge areas, 2, 5, 8 and 11 are the middle areas).
Fig 5.
Variations of length of both long axis and short axis (a) Length of long axis under single torsion load with 0.3°/s torsion speed (b) Length of short axis under single torsion load with 0.3°/s torsion speed (c) Length of long axis under single compression load (d) Length of short axis under single compression load.
Fig 6.
Strain contour of both long axis length and short axis length at different stages (a) Long axis of specimen under single torsion load (b) Long axis of specimen under compression-torsion coupling loads (c) Short axis of specimen under single torsion load (d) Short axis of specimen under compression-torsion coupling loads.
Fig 7.
The shear modulus and torsion strength of bone specimen under single torsion load with different torsion speeds (a) Shear modulus (b) Torsion strength.
Fig 8.
Macro and micro fracture morphology with different compression load (a) No compression, torsion speed 0.3°/s (b) 500N compression, torsion speed 0.3°/s (c) 1000N compression, torsion speed 0.3°/s (d) 1500N compression, torsion speed 0.3°/s.