A multilinear kinematic hardening material model is used in the analysis of the entire nuclear piping system (for both modal and transient analyses).
Following are the material properties for the entire system:
| Nuclear Piping System Material Properties | |
|---|---|
| Young's Modulus (MPa) | 1.89E+05 |
| Poisson's Ratio | 0.3 |
| Multilinear Kinematic Hardening Material Model | |
| Strain | Stress (MPa) |
| 0.00146 | 275.942 |
| 0.02184 | 280.14 |
| 0.02701 | 312.55 |
| 0.05 | 379.34 |
A Chaboche nonlinear kinematic hardening material model is used in the nonlinear static analysis of the elbow model (for both the ELBOW290 and SHELL281 models).
Following are the material properties for the elbow model:
| Elbow Model Material Properties | |
|---|---|
| Young's Modulus (MPa) | 2.03E+05 |
| Poisson's Ratio | 0.3 |
| Chaboche Nonlinear Kinematic Hardening Material Model | |
| Yield Stress (σy) | 275.92 MPa |
| Material Constant for First Kinematic Model (c1) | 65191.29 MPa |
| Material Constant for First Kinematic Model (γ1) | 1044.83 |
| Material Constant for Second Kinematic Model (c2) | 14909.91 MPa |
| Material Constant for Second Kinematic Model (γ2) | 177.06 |
| Material Constant for Third Kinematic Model (c3) | 1653.9 MPa |
| Material Constant for Third Kinematic Model (γ3) | 2.2 |
The mass density of the pipe material for all models is 12388 kg / m3. All material properties shown are taken from Nie.