Feasibility of Residual Stress Nondestructive Estimation Using the Nonlinear Property of Critical Refraction Longitudinal Wave

Table 2

The experimental result of stress detection resolution for grade 45 steel.

Parameters	Values
(MPa)	40	30	20	10	5
(V^−1)	2.6483	1.7991	1.2674	0.5928	0.0653
Error 1 (×10^−6)	4.7425	5.3217	3.9451	5.854	6.3418
	1	0.6793	0.4786	0.2238	0.0247
(m/s)	1.2476	0.8938	0.0736	0.0541	0.0622
Error 2	0.4328	0.3946	0.5037	0.5565	0.4932
	1	0.7164	0.059	0.0434	0.0498