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)
0	46.3535	84.2395	3.27610
20	46.369	84.256	3.27509	−5.27 × 10^14
40	46.3865	84.274	3.273907	−2.65 × 10^14
60	46.405	84.29	3.272383	−1.78 × 10^13
80	46.424	84.3155	3.27161	−1.34 × 10^13
100	46.44	84.3375	3.271006	−1.07 × 10^13
120	46.458	84.358	3.26995	−8.96 × 10^13
140	46.4755	84.382	3.26929	−7.70 × 10^13
160	46.4945	84.3985	3.26774	−6.78 × 10^13
180	46.513	84.417	3.26644	−6.05 × 10^13
200	46.533	84.432	3.26460	−5.49 × 10^13
220	46.555	84.456	3.2632	−5.01 × 10^13
240	46.575	84.4745	3.26171	−4.68 × 10^13
260	46.6	84.5	3.26001	−4.39 × 10^13

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