Date of download: 7/9/2016 Copyright © ASME. All rights reserved. From: Comparison of Strain Rosettes and Digital Image Correlation for Measuring Vertebral Body Strain J Biomech Eng. 2016;138(5): doi: / An example of one-camera view of the anterior surface of a prepared porcine vertebra. In this case, the strain rosette was applied on the right side. The bone was painted with a white layer with black speckle for DIC. Two sets of three dots were painted symmetrically about the centerline of the bone. Figure Legend:

Date of download: 7/9/2016 Copyright © ASME. All rights reserved. From: Comparison of Strain Rosettes and Digital Image Correlation for Measuring Vertebral Body Strain J Biomech Eng. 2016;138(5): doi: / Time history of the loading for each specimen. The pretest trial was used to ensure that the bone was seated to the PMMA. The prescribed loading was the same for all trials. Figure Legend:

Date of download: 7/9/2016 Copyright © ASME. All rights reserved. From: Comparison of Strain Rosettes and Digital Image Correlation for Measuring Vertebral Body Strain J Biomech Eng. 2016;138(5): doi: / Comparison of the RMS noise of the principal strains on the surface of the vertebrae measured by the strain rosette and DIC. For the DIC, the noise was measured both over the strain rosette and over the triangular region. Means (±1 SD) are shown and the raw data are plotted as points. The RMS noise was defined as the RMS error of the strain during 2 s of the trial where the load was held constant at 100 N. The DIC RMS noise levels are significantly different than the strain rosette. Figure Legend:

Date of download: 7/9/2016 Copyright © ASME. All rights reserved. From: Comparison of Strain Rosettes and Digital Image Correlation for Measuring Vertebral Body Strain J Biomech Eng. 2016;138(5): doi: / The difference at the loading peaks between the minimum principal strain measured by strain gage and DIC for trials (three peaks per trial, three trials). Peaks from trials that had no evidence of debonding are shown with circles while peaks from trials with evidence of debonding are shown as triangles. Figure Legend:

Date of download: 7/9/2016 Copyright © ASME. All rights reserved. From: Comparison of Strain Rosettes and Digital Image Correlation for Measuring Vertebral Body Strain J Biomech Eng. 2016;138(5): doi: / Bland–Altman plots of the magnitudes of the (a) minimum (compressive) principal strain and (b) maximum (tensile) principal strain measured using a strain rosette and DIC at the peak load. The horizontal axis is the average values of the strain measured using the rosette and the average value of thestrains from DIC over the same area at the peak load. The vertical axis is the value measured using the rosette minus the strain from DIC. The solid lines are the average value of all thedifferences. The dashed lines are the average value of the differences ±2 SDs. Figure Legend:

Date of download: 7/9/2016 Copyright © ASME. All rights reserved. From: Comparison of Strain Rosettes and Digital Image Correlation for Measuring Vertebral Body Strain J Biomech Eng. 2016;138(5): doi: / Example time histories of the minimum principal strains measured with DIC and strain rosette in one trial from each specimen in which debonding of the strain rosette was observed. For all trials where debonding was observed, the DIC measured higher absolute minimum principal strains than the strain rosette. Listed on each plot are the criteria met that demonstrate debonding. Figure Legend: