PSI - Issue 5

Sahand Pourhassan et al. / Procedia Structural Integrity 5 (2017) 1355–1362 Sahand Pourhassan et al./ Structural Integrity Procedia 00 (2017) 000 – 000

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1360

2124-T851 Aluminum alloy

2024-T3 ALCLAD aluminum alloy

100 150 200 250 300 350 400 450 500

100 150 200 250 300 350 400 450 500

DIC-3D

DIC-2D Clip-on extensometer

clip-on extensometer

Eng. Stress (MPa)

Eng. Stress (MPa)

0 50

0 50

0

0,02

0,04

0,06

0,08

0,1

0

0,05

0,1

0,15

0,2

0,25

Eng. Strain (mm/mm)

Eng. Strain (mm/mm)

(a) (b) Fig 8. comparison between DIC and clip-on extensometer on (a) 2024-T3 flat standard specimens (b) 2124-T851 cylindrical standard specimens Fig.9 (a) - (b) shows the results for the static tensile properties of 2024-T3 ALCLAD aluminum alloy for standard and non-standard geometries. Acquired average values of yield and tensile strength for 2024-T3 standard specimen are 304MPa and 460MPa, respectively. The average values of calculated strength slightly decreased in non-standard geometry, 290MPa and 456MPa. On the other hand, ductility was found to be almost the same in both geometries in 2024-T3 ALCLAD aluminum alloy. Likewise, in 2124-T851 aluminum alloy, Fig.9 (c) - (d), acquired strength values for standard cylindrical geometry were slightly higher than non-standard geometry, while showing similar final strain values. The static tensile properties of these materials are summarized in the table 3.

100 150 200 250 300 350 400 450 500

100 150 200 250 300 350 400 450 500

Eng. Stress (MPa)

Eng. Stress (MPa)

0 50

0 50

0

0,05

0,1

0,15

0,2

0,25

0

0,05

0,1

0,15

0,2

0,25

Eng. Strain (mm/mm)

Eng. Strain (mm/mm)

(a)

(b)

100 150 200 250 300 350 400 450 500

100 150 200 250 300 350 400 450 500

Eng. Stress (MPa)

Eng. Stress (MPa)

0 50

0 50

0

0,02

0,04

0,06

0,08

0,1

0

0,02

0,04

0,06

0,08

0,1

Eng. Strain (mm/mm)

Eng. Strain (mm/mm)

(c)

(d)

Fig. 9. 2024-T3 ALCLAD Al (a) standard geometry (b) non-standard geometry 2124-T851 Al (c) standard geometry (d) non-standard geometry