Issue 46

A. Deliou et alii, Frattura ed Integrità Strutturale, 46 (2018) 306-318; DOI: 10.3221/IGF-ESIS.46.28 311 Figure 7: Diagram and dimensions of CT50 specimens used for cracking tests Figure 8: Orientation of the CT specimens with respect to the welded joints According to the recommendations of ASTM E399 and AFNOR A03 404, the values of the stress intensity factor K in the case of CT geometry are calculated using the following relationship: 3 2 2  1 a P a w K f w a B w w                    (2) where the amplitude of loading [N], w is the width of specimen [m], B is thickness of specimen [m] and a, is the crack length. The compliance function a f w       is on the form [26, 45]: 2 3 4 0.886 4.46  13.31 14.72   5.6 a a a a a f w w w w w                                    (3)