STEEL WOOL UNDER COMPRESSIVE STRESS
1. CT scan
The steel wool was scanned to produce the 3D grayscale CT images. The compression stress up to 200 N was added to observe the change in the steel fiber orientation.
2. Change in overall shape under stress
3. Steel fiber orientation analysis
The individual fibers were segmented, and their orientations were analyzed. Red, blue, and green indicate vertically, at a 45-degree angle, and horizontally oriented fibers, respectively. When there was no stress, many vertical (red) fibers were seen on the right side. As the compressive stress increased, these vertical (red) fibers turned blue and green, indicating that the fiber orientation changed to accommodate the compressive stress.