Advances in Materials Science and Engineering / 2015 / Article / Tab 3

Research Article

Characteristic Evaluation on Bolt Stress by Ultrasonic Nondestructive Methods

Table 3

Axial tensile stress measurement results for a low-carbon 8.8 steel bolt.

Stress (μs) (μs)

046.40284.4843.28979
2046.41284.48853.2886−4.99 × 1014
4046.42784.4953.286792−2.51 × 1014
6046.440584.5053.285529−1.69 × 1014
8046.45684.5143.283863−1.27 × 1014
10046.4784.5243.282523−1.02 × 1014
12046.48784.5333.280624−8.59 × 1013
14046.502584.5433.27905−7.41 × 1013
16046.51984.5523.277234−6.53 × 1013
18046.533584.5623.275821−5.84 × 1013
20046.54984.5723.274252−5.29 × 1013
22046.5784.5823.27182−4.85 × 1013
24046.582584.593.270553−4.47 × 1013
26046.684.63.268675−4.16 × 1013

= 5958.466 m s−1.
= 3170.589 m s−1.
λ = 12.087 × 1010.
μ = 7.8910 × 1010.