This work consists of an experimental and a numerical investigation on how heat treated Ti-50.7% at Ni springs can affect the dynamical behavior of a single degree of freedom (1DOF) oscillator. Initially, the springs are solution annealed at 300°C, 400°C and 500°C over 30, 60, 90, and 120 min. After, the springs are characterized, through quasi-static loadings following a cyclic thermomechanical loading path until the inelastic strains saturate and the behavior of the springs stabilizes. The results demonstrate that springs aged at 400°C and 500°C present a larger hysteresis loop area when compared with those aged at 300°C. Then, the springs aged at 500°C are used in an experimental apparatus that represents a 1DOF system—the SMA spring represents the element of stiffness—and are analyzed in an up and down sweep frequency at two different temperatures. It is observed that the maximum amplitudes strongly depends on the temperatures and on the frequency test. It is also noticeable...

中文翻译：

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磁滞回线对NiTi形状记忆振荡器行为的影响

这项工作包括对Ni弹簧上Ti-50.7％的热处理如何影响单自由度（1DOF）振荡器的动力学行为的实验和数值研究。首先，将弹簧在30、60、90和120分钟内分别于300°C，400°C和500°C进行固溶退火。之后，通过沿着循环热机械载荷路径的准静态载荷来表征弹簧，直到非弹性应变达到饱和并且弹簧的性能稳定为止。结果表明，与在300°C下老化的弹簧相比，在400°C和500°C下老化的弹簧具有更大的磁滞回线面积。然后，老化温度为500°C的弹簧用于代表一维自由度系统的实验设备（SMA弹簧代表刚度的元素），并在两个不同温度下的上下扫描频率下进行分析。可以看出，最大幅度在很大程度上取决于温度和频率测试。这也很明显...