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A.S. Chernyatin et alii, Frattura ed Integrità Strutturale, 25 (2013) 15-19; DOI: 10.3221/IGF-ESIS.25.03 19 Figure 3 : The distribution of the stress intensity factors (a) and the non-singular stresses (b) along the crack front. R EFERENCES [1] Gonzalez-Albuixech, V.F., Giner, E., Fernandez-Saez, J., Fernandez-Canteli, A. Influence of the t 33 -stress on the 3-D stress state around corner cracks in an elastic plate, Engng. Fract. Mech., 78 (2011) 412-427. [2] Matvienko, Yu.G., Shlyannikov, V.N., Boychenko, N.V. In-plane and Out-of-plane Constraint Parameters along a Three-dimensional Crack-Front Stress Field under Creep Loading, Fatigue Fract. Engng. Mater. Struct., 36 (2013) 14- 24. [3] Razumovsky, I.A., Chernyatin, A.S. Experimental numerical method to estimate loading conditions for structures with surface cracks, Journal of Machinery and Reliability, 3 (2009) 247-254. [4] Nelder, J.A., Mead, R. A Simplex Method for Function Minimization. Computer Journal, 7 (1965) 308–313. [5] Nakamura, T., Parks, D. M. Determination of elastic T-stress along three-dimensional crack fronts using an interaction integral, Int. J. Solids Struct., 29 (1992) 1597–1611.