A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load

Table 1

Fitting coefficients of quadratic trinomial.

	b1	b2
0.2	0.545 9	0.487 3	0.412 5
0.3	0.841 4	0.813 2	0.306 7
0.4	1.032 0	0.954 0	0.246 9
0.5	1.217 5	1.133 9	0.205 0
0.6	1.357 4	1.226 2	0.179 2