Shape Memory Alloys (SMAs) find applications in passive damping systems for mechanical structures subjected to dynamical loading. Interest lies herein, the hysteretic dissipative capacity inherent to the superelastic effect and also in the re-centering action capability associated with the stress level of the retransformation plateau. The latter represents a distinct advantage of SMAs in comparison with other alternatives (e.g. controlled plastic yielding elements). The sound design of damping devices based on SMAs requires an adequate selection of material geometry and the characterization of the superelastic behavior under dynamical conditions [1, 2]. NiTi wires constitute an interesting alternative. They usually are arranged in symmetrical configurations as a pair of diagonal tendons. In that way, they are strained alternatively in only half of a complete oscillation of the structure. In the present work the design and the basic response of a damping device based on superelastic NiTi wires, which avoids inactive half cycle periods is presented. The design, based upon a model studied by Dolce et al.[3], allows introducing a continuous degree of wire pre-straining. The effect of pre-straining on the re-centering capabilities is also assessed.
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机译：形状记忆合金（SMA）在被动阻尼系统中找到用于经受动态负载的机械结构的应用。兴趣涉及本文，具有超弹性效果固有的滞质耗散能力，以及与重新变换高原的应力水平相关的重新定心动作能力。与其他替代方案相比，后者表示SMA的明显优点（例如，控制塑料产生元素）。 The sound design of damping devices based on SMAs requires an adequate selection of material geometry and the characterization of the superelastic behavior under dynamical conditions [1, 2]. NITI线构成一个有趣的替代方案。它们通常以对称配置排列为一对对角腱。以这种方式，它们仅在结构完全振荡的一半中替代地紧张。在本工作中，呈现了基于超弹性NITI线的阻尼装置的设计和基本响应，其避免了避免非活动的半周期周期。该设计基于Dolce等人研究的模型。[3]，允许引入连续的电线预压度。还评估了预紧张对重心能力的影响。
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