${{\sigma }^{\prime }}_c/E_c$

0.0015

0.0020

0.0025

0.0030

$D_c/\text{mm}$

$\gamma =0.\text{9}~0.\text{7}$

500

0.17~0.21

0.22~0.29

0.28~0.36

0.33~0.43

600

0.20~0.26

0.27~0.34

0.33~0.43

0.40~0.51

700

0.23~0.30

0.31~0.40

0.39~0.50

0.47~0.60

800

0.27~0.34

0.36~0.46

0.44~0.57

0.53~0.69

900

0.30~0.39

0.40~0.51

0.50~0.64

0.60~0.77

1000

0.33~0.43

0.44~0.57

0.56~0.71

0.67~0.86

1100

0.37~0.47

0.49~0.63

0.61~0.79

0.73~0.94

1200

0.40~0.51

0.53~0.69

0.67~0.86

0.80~1.03

1300

0.43~0.56

0.58~0.74

0.72~0.93

0.87~1.11

1400

0.47~0.60

0.62~0.80

0.78~1.00

0.93~1.20

1500

0.50~0.64

0.67~0.86

0.83~1.07

1.00~1.29

1600

0.53~0.69

0.71~0.91

0.89~1.14

1.07~1.37

1700

0.57~0.73

0.76~0.97

0.94~1.21

1.13~1.46

1800

0.60~0.77

0.80~1.03

1.00~1.29

1.20~1.54

1900

0.63~0.81

0.84~1.09

1.06~1.36

1.27~1.63