Figure 6.

Comparison of predicted strain fields for a representative realization of the input random vector (i.e., ${\mathit{x}}_{\text{M}}^o$ = (0.744, −0.158, 0.467, 0.908, 0.915, −0.450×10⁻², 0.239, 0.716, 2.05, −0.141×10⁻², 0.643, 0.618, 1.66, −0.181×10⁻², 0.513, 0.619); see order of material properties in Eq. (3), and units in Table 1) by surrogate models trained using the remaining 299 input-output pairs, with the corresponding fields resulted from the computational head model: (a) MAS strain field, (c) CMPS strain field. The corresponding absolute relative errors for the MAS and CMPS strain fields are shown in (b) and (d), respectively.