PSI - Issue 18

Abdeljalil Jikal et al. / Procedia Structural Integrity 18 (2019) 731–741 Abdeljalil JIKAL et al./ Structural Integrity Procedia 00 (2019) 000–000

739

9

overestimates the damage. This may explain the simplicity and the safety to use Miner's law compared to other theories.

Fig. 6. Theoretically corrected and adaptive estimation of rupture force.

1

Increasing loading level

0.9

Miner rule D( =2.27) D( =2.09) D( =1.3)

0.8

0.7

0.6

0.5

0.4

0.3

0.2

Damage according to unified theory

0.1

Fig. 7. Damage curves according to the unified theory of damaged strands. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Life fraction 0

4.6. Comparison of the damage calculation models The comparison of damage models by Eq. (4), unified theory Eq. (5) and theoretical for strand specimens damaged at different levels of corrosion is plotted in Fig. 8. This comparison shows that the experimental and theoretical damage