Table 6 Optimum die radius r and exponent gradient m obtained through MDO for FGT inversion tube
Number of cycle | Design parameter interval | Optimal exponent gradient \( m \) | Optimal die radius \( r\;\left(\mathrm{mm}\right) \) | DAF | P max (kN) |
|---|---|---|---|---|---|
1 | 3 < m < 4 0.01 < μ d < 0.02 | 4 | 0.02 | 1.2 | 59.66 |
2 | 4 < m < 5 0.02 < μ d < 0.03 | 4.8 | 0.028 | 1.3 | 57.34 |
3 | 5 < m < 6 0.03 < μ d < 0.04 | 5.7 | 0.031 | 1.4 | 52.23 |
4 | 6 < m < 8 0.03 < μ d < 0.035 | 6.3 | 0.031 | 1.5 | 50.42 |
5 | 6 < m < 7 0.03 < μ d < 0.033 | 6.1 | 0.033 | 1.5 | 50.01 |