Flextensional Transducers with Shape Memory Caps for Tunable Devices

Flextensional Transducers with Shape Memory Caps for Tunable Devices
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用于可调谐设备的具有形状记忆帽的屈张传感器

DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
R. Newnham
R. Newnham
中科院分区：
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文献类型：
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作者：
R. J. Meyer;R. Newnham

文献摘要

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形状记忆合金被用作“钹”弯张换能器的盖。活性帽提供可调谐的共振频率和与合金的马氏体相变相关联的损伤恢复机制。对这两个概念进行了研究，并观察到Ni-Ti合金帽的谐振频率发生了25%的变化。研究还表明，在静水压力使换能器帽屈曲后，可以实现完全的形状恢复。帽变形和恢复证明与轮廓仪和d h测量。
Shape memory alloys were used as caps for the “cymbal” flextensional transducer. The active caps provide a tunable resonance frequency and a damage recovery mechanism associated with the alloy’s martensitic phase transformation. These two concepts were investigated and a 25% change in resonance frequency was observed for Ni-Ti alloy caps. It was also demonstrated that complete shape recovery could be achieved after hydrostatic pressures buckled the transducer caps. Cap deformation and recovery were demonstrated with profilometer and d h measurements.