Research Article
Feasibility of Residual Stress Nondestructive Estimation Using the Nonlinear Property of Critical Refraction Longitudinal Wave
Table 1
Sensitivity parameters of the relative nonlinear coefficient and wave velocity for stress.
| Prestress (MPa) | Sensitivity parameter 1 (%) | Standard deviation 1 (Ć10ā6) | Sensitivity parameter 2 (%) | Standard deviation 2 |
| 40 | 1.9299 | 5.99 | 0.0019 | 0.413 | 80 | 7.3764 | 6.61 | 0.0279 | 0.369 | 120 | 10.1532 | 4.979 | 0.0392 | 0.42 | 160 | 13.2785 | 7.084 | 0.0554 | 0.582 | 200 | 18.9297 | 9.46 | 0.0649 | 0.537 | 240 | 23.8714 | 6.54 | 0.1197 | 0.328 | 280 | 40.058 | 8.165 | 0.1349 | 0.43 | 320 | 56.1403 | 7.993 | 0.1664 | 0.516 | 360 | 71.7694 | 6.064 | 0.2021 | 0.484 | 400 | 87.2034 | 5.315 | 0.2075 | 0.576 |
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