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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 BC - Elastic unloading segment of the martensite phase, marked by a reduction in force and total strain while maintaining a constant value of pseudoelastic stresses.  BD - Segment of the austenite phase transformation, where force and plastic strain decrease occurs.  D0 - Segment of elastic unloading, where pseudoelastic strains are absent.

Fig. 6. The graph of changes in the axial force and axial stresses over time.

Fig. 7. The graph of changes in pseudoelastic and total strain over time.

At the beginning of the calculation, the system’s total energy is 97.65 J. In Figure 8, it can be observed that with each cycle, the kinetic energy decreases while the accumulated deformation energy increases. However, active energy damping occurs until 2.5 s. This is due to the absence of further growth in pseudoelastic strain in the SMA wire after 2.5 seconds. The change in strain is presented in Fig. 9.