Issue 60

H. Djeloud et alii, Frattura ed Integrità Strutturale, 60 (2022) 346-362; DOI: 10.3221/IGF-ESIS.60.24

3.5x10 4

0.5 ]

3.0x10 4

J-integral contour (diameter=5h e ) J-integral contour (diameter=4h e ) J-integral contour (diameter=3h e ) Enriched element SED approach

2.5x10 4

2 Stress intensity factor K I [(MPa)(mm) 3 0.0 5.0x10 3 1.0x10 4 1.5x10 4 2.0x10 4

4

5

6

7

8

Crack length [mm]

Figure 10: Crack length versus SIF calculated by SED and J-integral with different contour sizes I K .

0.5 ]

0.0

-5.0x10 2

2 Stress intensity factor K II [MPa(mm) 3 -2.0x10 3 -1.5x10 3 -1.0x10 3

Enriched zone (diameters=5h e ) Enriched zone (diameters=4h e ) Enriched zone (diameters=3h e ) Enriched element

4

5

6

7

8

Crack length [mm]

Figure 11: Crack length versus SIF calculated by SED and J-integral with different enriched zone sizes II K .

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