PSI - Issue 42

Dorin Radu et al. / Procedia Structural Integrity 42 (2022) 1106–1112 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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stress ranges sequentially line by line, repeating the entire cyclic loading - entire group of cycles for a number of blocks, one block representing all the applied cycles of stress ranges, ( Grbović et al 2019 , Arsić et al 2021, Jeremić et al 2021). It resulted in the number of cycles until reaching the critical flaw dimension (length or height). A comparison was made between groups of flaws, in order to detect and underline the most critical flaws in term of fast crack growth and number of cycles until reaching the critical dimensions – remaining in service life time. Thus, the FP-SF5 resulted the most critical type one – from a 0 = 5 mm surface flaw (of 20 mm length) in the transversal girder, the flaw will extend to a critical crack value of 9.2 mm in 24 years (figure 5 & 6).

Fig. 5. FP-SF-5 results. Sensitivity Parameter Flaw Height a = 9.2 mm.

Fig. 6. FP-SF-5 results. Flaw will extend to a critical crack value of 9.2 mm in 24 years (blocks=years).