ε

σ

8 × 108 (1 + ε)

1

0.185

2.73 × 106

9.48 × 108

2

0.254

2.94 × 106

10.032 × 108

3

0.267

3.06 × 106

10.136 × 108

4

0.288

3.1 × 106

10.304 × 108

5

0.358

3.26 × 106

10.864 × 108

6

0.465

3.42 × 106

11.72 × 108