Issue 47

Yu. G. Matvienko et alii, Frattura ed Integrità Strutturale, 47 (2019) 303-320; DOI: 10.3221/IGF-ESIS.47.23 307 Specimen T5_20H T5_13H T5_16H T5_12H T5_18H T5_19H T5_17H T5_H1 Number of cycles, N 0 1000 2000 3000 4000 5000 6000 6300 Life time, % 0 16 32 48 63 79 95 100 Table 1 : Nomenclature of T5-H1 specimens and fatigue loading program. Specimen T5_20 H T5_21 H T5_22 H T5_23 H T5_24 H T5_25 H T5_26 H T5_27 H T5_H2 Number of cycles, N 0 1000 2000 3000 6000 9000 12000 15000 15800 Life time, % 0 6 13 19 38 57 76 95 100 Table 2 : Nomenclature of T5-H2 specimens and fatigue loading program. Figure 1 : Scheme of consecutive notches at each measurement step and corresponding interference fringe patterns. The details of the experimental procedure are presented in Ref. [36]. In short, the scheme of the experiment involved, conventionally shown in Fig. 1, resides in the following. Constant tensile load P is applied to the specimen. The first exposure