Figure 4: Projection in the \(y,z\) plane of segmented microfractures for the untreated sample [ACfresh02]. Orange ellipses show the onset of localization, pink ellipses indicate formation of additional localized zone, completing the radial pattern. Letters refer to the stress-strain steps in Table 3. Color-coding shows the local fracture aperture at each voxel. See Figure S5 in SI for zip file of high resolution images.
Table 4: Differential stress, \(\sigma\), and axial strain, \(\epsilon\), for each μCT sub-volume in the heat-treated sample [ACHT01]. Letters A-P refer to the image volumes shown in Figure 5. Localization was first seen in scan H along a shear zone that subsequently arrested when microcracks localized along a more favorably-oriented damage zone in scan K, along which the sample eventually failed.