1 Introduction
2 Finite Element Simulation of Wheel-Mounted Brake Disc
2.1 Finite Element Model and Material Properties
Temperature (℃) | Tensile strength (MPa) | Yield strength (MPa) | Thermal expansion coefficient (10−6·K−1) | Elastic modulus (GPa) | Poisson’s ratio | Thermal conductivity (W·m−1·K−1) | Specific heat capacity (J·kg−1·K−1) |
---|---|---|---|---|---|---|---|
20 | 1235 | 1137 | 11.6 | 211 | 0.28 | 45.2 | 473 |
200 | 1130 | 1030 | 11.6 | 202 | 0.28 | 43.6 | 523 |
400 | 1050 | 945 | 13.6 | 187 | 0.29 | 43.9 | 607 |
600 | 565 | 420 | 14.2 | 168 | 0.3 | 42.3 | 754 |
700 | 191 | 100 | 14.2 | 152 | 0.31 | 43.8 | 805 |
Temperature (℃) | Tensile strength (MPa) | Yield strength (MPa) | Thermal expansion coefficient (10−6·K−1) | Elastic modulus (GPa) | Poisson’s ratio | Thermal conductivity (W·m−1·K−1) | Specific heat capacity (J·kg−1·K−1) |
---|---|---|---|---|---|---|---|
20 | 1160 | 755 | 16.8 | 199 | 0.3 | 38.3 | 524 |
200 | 968 | 714 | 16.8 | 199 | 0.3 | 36.4 | 575 |
400 | 919 | 651 | 17.4 | 199 | 0.3 | 32.7 | 607 |
600 | 880 | 620 | 17.8 | 157 | 0.3 | 29.1 | 752 |
2.2 Calculation of Thermal Load and Relevant Parameters
2.3 Thermo-Elastic Stress Field
3 Full Scale Bench Test
Initial velocity (km/h) | 160 | 200 | 250 | 280 | 300 | 330 | 350 |
Braking time (s) | 43 | 59 | 83 | 104 | 130 | 151 | 146 |
Maximum temperature rise of friction ring surface (℃) | 217.2 | 303.6 | 357.0 | 404.4 | 397.5 | 455.4 | 554.3 |
Maximum temperature rise of bolt (℃) | 57.4 | 90.8 | 155.6 | 184.5 | 199.0 | 227.8 | 263.4 |