Advances in Materials Science and Engineering / 2015 / Article / Tab 2

Research Article

Characteristic Evaluation on Bolt Stress by Ultrasonic Nondestructive Methods

Table 2

Tensile stress measurement results for a low-carbon 4.8 steel bolt.

Stress (μs) (μs)

046.353584.23953.27610
2046.36984.2563.27509−5.27 × 1014
4046.386584.2743.273907−2.65 × 1014
6046.40584.293.272383−1.78 × 1013
8046.42484.31553.27161−1.34 × 1013
10046.4484.33753.271006−1.07 × 1013
12046.45884.3583.26995−8.96 × 1013
14046.475584.3823.26929−7.70 × 1013
16046.494584.39853.26774−6.78 × 1013
18046.51384.4173.26644−6.05 × 1013
20046.53384.4323.26460−5.49 × 1013
22046.55584.4563.2632−5.01 × 1013
24046.57584.47453.26171−4.68 × 1013
26046.684.53.26001−4.39 × 1013

= 5658.406 m s−1.
= 3150.549 m s−1.
λ = 12.087 × 1010.
μ = 7.8910 × 1010.
= 7850 kg m−3.