Article Figures & Data
Figures
- Fig. 1
Three different nucleus materials with identical geometry were tested: (A) PU, (B) UHMWPE, and (C) TI.
- Fig. 2
Environmental chamber and load cell mounted within MTS system.
- Fig. 3
Plot of dynamic stiffness as a function of frequency for each group of nucleus materials (n = 10 each). The equation of each line of best fit and its associated correlation coefficient (R 2) are included underneath the lines.
- Fig. 4
Plot of viscous damping ratio for each group of nucleus materials (n = 10 each). The value in newton-millimeters is included for each material, along with the standard deviation. An asterisk indicates that a group is statistically different from the other groups.
- Fig. 5
Plot of dynamic stiffness for each group of nucleus materials (n = 10 each). The value in newtons per millimeter is included for each group, along with the standard deviation. An asterisk indicates that a group is statistically different from the other groups.
- Fig. 6
Force– displacement (Disp) plots of impulse and quasi-static tests showing biphasic response of PU material. The graph on the left shows the displacement of each material in millimeters as a function of the single impulse force in newtons applied to it. The graph on the right shows the force-displacement curves that resulted from a slow compression of 0.2 mm/s (12 mm/min).
- Fig. 7
Plot of initial (K1), secondary (K2), and average (Kave) quasi-static stiffness for PU nuclei (n = 10). The value in newtons per millimeter is included for each group, along with the standard deviation. An asterisk indicates that a group is statistically different from the other groups.
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