PSI - Issue 25

Tiago Bento et al. / Procedia Structural Integrity 25 (2020) 234–245

243

Tiago Bento / Structural Integrity Procedia 00 (2019) 000 – 000

10

Fig. 12. Bending test: (a) Experimental test; (b) Numerical simulation and modulated FBG sensor. (a) (b)

Note that in Fig. 12 (a) the actuator at the top is also cylindrical but made by locking a small cylinder in place between pneumatic claws, which did not touch the T-joint panel, but were close enough to prevent it from buckling under load due to an eventual asymmetry in the displacement applied. Next the same parameters as in the previous specimen were measured in a tensile test, Fig. 13.

0 1 2 3 4 5 6 7 8 9 10

50

0

0

0,5

1

1,5

2

2,5

-100 Microstrain ( με ) -50

Strain-Bragg Strain-FEM Load

Load [kN]

-150

-200

Displacement applied [mm]

Fig. 13. T-joint tensile test Bragg fiber's reading.

(a)

(b)

Fig. 14. Tensile test: (a) Experimental test; (b) Numerical simulation.