Research Article
Numerical Analysis of Joule Heating Behavior and Residual Compressive Stress around Crack Tip under High Electric Load
Table 1
Temperature-dependent physical properties of mild steel [
9,
13].
| | Temperature (°C) | Young’s modulus
E (GPa) | Yielding strength
(MPa) | Coefficient of thermal expansion
α(1/°C) | Thermal conductivity k (W/m-°C) | Specific heat
(J/kg-°C) | Resistivity
ρ(Ω-m) |
| | 21 | 206.8 | 248 | 10.98 × 10−6 | 64.60 | 444 | 0.14224 × 10−6 | | 93 | 196.5 | 238 | 11.52 × 10−6 | 63.15 | 452.38 | 0.18644 × 10−6 | | 204 | 194.4 | 224 | 12.24 × 10−6 | 55.24 | 511.02 | 0.26670 × 10−6 | | 315.5 | 186 | 200 | 12.96 × 10−6 | 49.87 | 561.29 | 0.37592 × 10−6 | | 426.7 | 169 | 173 | 13.50 × 10−6 | 44.79 | 611.55 | 0.49530 × 10−6 | | 537.8 | 117 | 145 | 14.04 × 10−6 | 39.71 | 661.81 | 0.64770 × 10−6 | | 648.9 | 55 | 76 | 14.58 × 10−6 | 34.86 | 762.34 | 0.81788 × 10−6 | | 760 | 6.9 | 14 | 14.05 × 10−6 | 30.46 | 1005.3 | 1.0109 × 10−6 | | 871 | — | — | 13.05 × 10−6 | 28.37 | 1005.3 | 1.1151 × 10−6 | | 982 | — | — | — | 27.62 | 1005.3 | 1.1582 × 10−6 | | 1093 | — | — | — | 28.52 | 1189.6 | 1.1786 × 10−6 | | 1204 | — | — | — | — | 1189.6 | 1.2090 × 10−6 |
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Poisson’s ratio = 0.3, density = 7861.2 kg/m3, melting point = 1521°C.
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