PSI - Issue 47

Stefano Rodinò et al. / Procedia Structural Integrity 47 (2023) 579–588 Carmine Maletta / Structural Integrity Procedia 00 (2018) 000–000

586

8

3.3. Model Validation The bending shape of SMA-polymer prototype are compared with the analytical results given by the proposed model. The input parameters used in the model, as obtained from thermo-mechanical characterization tests, are reported in Table 2.

Table 2. Thermo-mechanical parameters of the used SMA material on the final prototype.

Parameter

Value

E A E M M s M f A s A f C A C M

47 [GPa] 20 [GPa]

24°C 41°C 51°C 64°C

16 MPa/°C 16 MPa/°C

ε σ σ h b L

�

6.3%

��� ���

120 MPa 240 MPa

a

0.0035 mm 2.1965 mm

h m

40 mm 180 mm

Fig. 7 reports a comparison of the active composite deflection curve between experiment and simulations. A very good agreement is observed between the two curves with maximum errors never higher than 5.5%.

Fig. 7. Comparison between the analytical model response and the measured experimental one.

4. Conclusion An active SMA-polymer composite plate, with shape-morphing capabilities, was designed and manufactured by 3D printing. In addition a simple and effective analytical model was developed to predict the shape morphing properties of the active composite. It was shown that model prediction, in terms of deflection curve, are in good