PSI - Issue 10

Alk. Apostolopoulos et al. / Procedia Structural Integrity 10 (2018) 49–58 Alk. Apostolopoulos and T. Matikas / Structural Integrity Procedia 00 (2018) 000 – 000

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Table 4. Mechanical properties and life expectancy of Φ 12, B500B – 45 days corroded.

Sample

Free length

Strain ( % )

Max stress ( MPa ) 561.6

Stress at min strain ( MPa )

Force at min strain ( kN )

Min stress ( MPa ) -546.3

Min force ( kN ) -61.8

Cycles to failure

Dissipated energy ( MPa )

Mass loss ( % )

6 Φ

Mean value B500B 21-23 Mean value B500B 1-3 Mean value B500B 4-6 Mean value B500B 10, 30, 40

-543.9

-61.5

36

815.1

5.76

±2.5%

8 Φ

567.8

-444.1

-50.2

-509.1

-57.6

17

325.8

5.88

8 Φ

598.7

-375.3

-42.4

-495.7

-56.1

8

251.7

5.93

±4%

6 Φ

596.1

-518.8

-58.7

-543.2

-61.4

11

443.9

5.92

Mean value 5.88

Table 5. Mechanical properties and life expectancy of Φ 12, B500B – 90 days corroded.

Sample

Free length

Strain ( % )

Max stress ( MPa ) 578.72

Stress at min strain ( MPa )

Force at min strain ( kN )

Min stress ( MPa ) -549.6

Min force ( kN ) -62.9

Cycles to failure

Dissipated energy ( MPa )

Mass loss ( % )

6 Φ

Mean value B500B 36-39, 20 Mean value B500B 11-14 Mean value B500B 15-19 Mean value B500B 31-35

-543.2

-61.4

28

628.57

11.06

±2.5%

8 Φ

585.58

-442.0

-50.0

-491.8

-55.6

17

314.80

11.43

8Φ

604.38

-349.4

-38.9

-486.0

-54.2

8

232.49

11.58

±4%

6 Φ

586.00

-514.9

-58.8

-550.8

-62.9

10

385.27

11.39

Mean value 11.37

Table 6. Mechanical properties and life expectancy of Φ 12, B500A – non corroded.

Sample

Free length

Strain ( % )

Max stress ( MPa ) 551.7

Stress at min strain ( MPa )

Force at min strain ( kN )

Min stress ( MPa ) -534.0

Min force ( kN ) -60.4

Cycles to failure

Dissipated energy ( MPa )

6 Φ

Mean value B500A 41-45 Mean value B500A 46-50 Mean value B500A 51-55 Mean value B500A 56-60

-513.2

-58.0

31

682.90

±2.5%

8 Φ

551.8

-431.5

-48.8

-513.3

-58.0

17

301.80

8 Φ

556.8

-339.8

-38.4

-493.3

-55.8

7

231.60

±4%

6 Φ

566.8

-498.8

-56.4

-540.1

-61.1

10

393.69