PSI - Issue 25

Daniel J. Cruz et al. / Procedia Structural Integrity 25 (2020) 316–323

320

Daniel J. Cruz et al. / Structural Integrity Procedia 00 (2019) 000–000

5

350

Macro speciment

300

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SS-2X2

SS-2X12

150 S [MPa]

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0

0

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e [%]

Fig. 6: Tensile test results for AZ31B sheet alloy

3. Mini Sample Tester Device - MSTD

After the preliminary tests, a new prototype was developed - Mini Sample Tester Device (MSTD) (Fig. 7) - capable to test miniaturised specimens in uniaxial loading (compression and tension). The equipment has a maximum capacity of 2.5 kN and a stroke of analysis of 42.7 mm. The linear motion of the equipment is guaranteed by a step motor combined to a ball screw. The motion is transmitted to a free body where the mobile-grip is attached. The fixed-grip is mechanically fastened to an “S-Type” load cell and all the components are guided by two rectified shafts. This layout allows test materials in tension but also in compression, once all the components are in a common longitudinal plane.

Fig. 7: Mini Sample Tester Device - MSTD