Table 1 A list of features used to train BiLSTM model for predicting Δa23
Feature | Description |
|---|---|
mmax | Maximum of the Schmid factors evaluated across 12 slip systems |
\(\mathop{\sum }\nolimits_{1}^{5}m\) | Sum of the five largest Schmid factors out of those evaluated across 12 slip systems |
\({d}_{fs}^{x},{d}_{fs}^{y}\) | Nearest distance to the free surface in X and Y directions |
a | Half-crack length |
\(\left\vert \gamma \right\vert\) | Absolute angular position of CFP |
ωavg | Disorientation angle |
E[001] | Elastic modulus along the loading direction [001] |
Γ | A binary variable indicating whether a CFP is at the intersection of a grain boundary |
Δak−1 | Crack extension at crack growth increment k − 1 |
\({D}_{5}^{{\rm{avg}}}\) | Fatigue indicator parameter extracted using the micromechanical fields at k = 0 |
\({\epsilon }_{{\rm{eq}}}^{{\rm{avg}}}\) | Equivalent plastic strain extracted using the micromechanical fields at k = 0 |
\({\sigma }_{{\rm{triax}}}^{{\rm{avg}}}\) | Stress triaxiality extracted using the micromechanical fields at k = 0 |
\({\epsilon }_{33}^{{\rm{avg}}}\) | Strain along Z-direction extracted using the micromechanical fields at k = 0 |
\(\nabla {\epsilon }_{33}^{{\rm{avg}}}\) | Strain gradient along Z-direction extracted using the micromechanical fields at k = 0 |
