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. Author manuscript; available in PMC: 2019 Apr 27.
Published in final edited form as: J Biomech. 2018 Mar 2;72:63–70. doi: 10.1016/j.jbiomech.2018.02.033

Figure 3.

Figure 3

(A) Force verses blade depth curves, up to the point of first-cut, normalized by the cut force and cut depth, and grouped by blade speed. Individual samples are shown in dotted lines and group averages +/− standard deviation are shown in solid lines. Surface-intact samples (gray curves) show characteristic “J”-shaped response. In the 2.5 μm/s group, surface-removed samples follow a similar trend. However, at higher speeds the surface-intact and -removed groups become increasingly distinct and, instead of a toe-region, surface-removed samples show a sharp initial rise. (B) A Tukey box plot of the RMS deviation between each pair of normalized force curves, as a function of blade speed. Groups that share a letter are not significantly different, confirming that the intact and removed samples become increasingly distinct (higher deviation) at faster speeds.