Fitting method | Normal stress | Experimental breaking stress/ Numerical breaking stress (MPa) | Percentage/ accuracy |
Fourier fourth order | 0.1 MPa | 0.895 | 0.56% |
0.890 | |||
0.2 MPa | 1.482 | 0.27% | |
1.478 | |||
0.3 MPa | 2.001 | 0.10% | |
2.003 | |||
Exponential | 0.1 MPa | 0.895 | 1.90% |
0.878 | |||
0.2 MPa | 1.482 | 1.96% | |
1.453 |