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首页> 外文期刊>Smart Materials & Structures >Novel insight into the strain-life fatigue properties of pseudoelastic NiTi shape memory alloys
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Novel insight into the strain-life fatigue properties of pseudoelastic NiTi shape memory alloys

机译：对伪弹性NITI形状记忆合金的应变寿命性能的新颖洞察

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摘要

The whole low-to-high cycle fatigue behavior of a pseudoelastic NiTi SMA was analyzed. Global and local strains measurements were carried out by an extensometer and digital image correlation. Significant differences were observed at the two scales, due to the localized nature of stress-induced transformations. Local mechanisms play a crucial role on fatigue damage and have a direct effect on the Z-shaped strain-life curves observed in previous works. The effective nature of this unusual behavior was revealed by systematic analysis of local strain. Finally, strain decomposition was made and data were analyzed by a recent modified Coffin-Manson approach.
机译：分析了伪弹性NITI SMA的整个低至高的循环疲劳行为。 通过伸展计和数字图像相关来进行全局和局部菌株测量。 由于应力诱导的转化的局部性质，在两种尺度上观察到显着差异。 局部机制在疲劳损伤中发挥着至关重要的作用，并对以前的作品中观察到的Z形应变寿命曲线具有直接影响。 通过对局部应变的系统分析，揭示了这种异常行为的有效性。 最后，制定了应变分解，并通过最近修改的棺材曼森方法分析了数据。

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