Figure 9
The six plots compare predicted E subscript s per cent against step size in degrees for Joint 1 to Joint 6, K 3, Positive. The x-axes use a logarithmic scale from about 10 superscript minus 4 to 10 superscript minus 1 degrees. The y-axes range from minus 50 to above 100 per cent. Each plot includes experimental data plus or minus 1 sigma, a G P R model plus or minus 1 sigma, an experimental data average curve and a G P R model average curve. Joint 1 and Joint 2 fluctuate at smaller step sizes and approach 0 as step size increases. Joint 3 stays above 0 at smaller step sizes and approaches 0 after about 10 superscript minus 3 degrees. Joint 4, Joint 5 and Joint 6 show higher positive predicted E subscript s values across a wider small-step range before approaching 0 at larger step sizes.Result of the GPR model fitting
Source: Authors’ own work