Experimental Investigation of the Pseudoelastic Hysteresis Damping Characteristics of Shape Memory Alloy Wires

摘要: An experimental investigation was conducted to determine the pseudoelastic hysteresis damping characteristics of Ni-Ti Shape Memory Alloy (SMA) wires. The comprehensive study examines effects cycling, oscillation frequency, strain amplitude, temperature, and static offset on stress-strain SMA wires under axial loading. Experimental data are obtained for complete austenite-martensite transformation as well partial hysteresis. results indicate that frequency excitation increases, reverse phase from detwinned martensite austenite commences at higher stress levels, area loop decreases. This in a rapid initial decrease energy dissipation, but approaches stable level by about 10 Hz. dissipation Hz found be 50% observed very low frequencies. dissipated temperatures up 40% lower than th...