Table 1.
Nitinol material data used for FEA.
| Nitinol model parameters | Values | |
|---|---|---|
| Temperature | 37 °C | 25 °C |
| Young’s modulus of the austenite phase (EA) | 73,889 MPa | 73,889 MPa |
| Young’s modulus of the martensit phase (EM) | 22,566 MPa | 22,566 MPa |
| Poisson’s ratio (v) | 0.3 | 0.3 |
| Maximum residual strain (ɛr) | 0.053 | 0.053 |
| Material response ratio between tension and compression (α) | 0.2 | 0.2 |
| Starting stress value for the forward phase transformation (σSAS) | 398 MPa | 356 MPa |
| Finish stress value for the forward phase transformation (σSAF) | 427 MPa | 382 MPa |
| Starting stress value for the reverse transformation (σSSA) | 210 MPa | 188 MPa |
| Finish stress value for the reverse transformation (σFSA) | 151 MPa | 135 MPa |