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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Fig.6. Surface strain concentration prior rupture for both specimen geometries with attached virtual extensometer

Fig. 7. DIC strain field on 2124-T851 Al with attached virtual extensometer

The comparison between clip-on extensometer and DIC on standard specimens for 2024-T3 ALCLAD and 2124 T851 aluminum alloy materials are presented as a typical stress-strain curve. The results are in great agreement as can be seen in fig. 8, which confirms the output of current optic measurement method on smaller geometries where conventional extensometers may not be able to fit on gauge length of material.