PSI - Issue 59

V. Iasnii et al. / Procedia Structural Integrity 59 (2024) 299–306 V. Iasnii et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 10. The chart of energy conversion during the first half period.

The data about the amount of dissipated energy and the damping coefficient for each half-period of oscillations are presented in Table 2. As the plastic deformations decrease, the amount of dissipated energy decreases. Therefore, an averaged damping coefficient was determined. The dataset includes data from those oscillation periods in which significant plastic deformations are observed. The damping coefficient calculated over five half periods of oscillations equals η=0.07 √ (3) where ( ) . Subsequent oscillations do not dissipate energy as they occur within the elastic deformation zone of the wire and do not perform the work of the austenitic-martensitic transformation.

Table 2. Characteristics of the damping device

Characteristic

Half-period 1

2

3

4

5

6

7

8

9

10

Dissipated energy, J

31.59

22.452

15.43

9.92 0.44 0.07

6.00 0.41 0.06

3.48 0.34 0.05

1.83 0.24 0.04

0.98 0.16 0.03

0.51 0.09 0.01

0.26 0.05 0.01

Logarithmic decrement 0.41

0.41 0.07

0.43 0.07

Damping coefficient

0.07

4. Conclusions To predict the damping capability of SMA-based dampers, this study suggested a method for numerical analysis of behavior under cyclic loading. For investigation, the precise three-dimensional FE model was established in ANSYS. From the simulation results, the dissipated energy and damping coefficient for each half-period of oscillations were determined. The FEM modeling results show that the damping device can handle a mass of 6 tones under the seismic load.