Real-Time and Quantitative Measurement of Crack-Tip Stress Intensity Factors Using Digital Holographic Interferometry

Table 1

The comparison between the measured values and theoretical values of .

Tensile load (MPa)	Measured (MPa·m^0.5)	Theoretical (MPa·m^0.5)	Relative error (%)
1.0	0.193	0.191	1.0
1.5	0.291	0.287	1.4
2.0	0.379	0.383	−1.0
2.5	0.503	0.479	5.0