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首页> 外文会议>International Conference on High Performance Structures and Materials; 2006; Ostends(BE) >Study on fatigue and energy-dissipation properties of nanolayered Cu/Nb thin films
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Study on fatigue and energy-dissipation properties of nanolayered Cu/Nb thin films

机译：纳米Cu / Nb纳米薄膜的疲劳和耗能性能研究

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摘要

Energy dissipation and fatigue properties of nano-layered thin films are less well studied than bulk properties. Existing experimental methods for studying energy dissipation properties, typically using magnetic interaction as a driving force at different frequencies and a laser-based deformation measurement system, are difficult to apply to two-dimensional materials. We propose a novel experimental method to perform dynamic testing on thin-film materials by driving a cantilever specimen at its fixed end with a bimorph piezoelectric actuator and monitoring the displacements of the specimen and the actuator with a fibre-optic system. Upon vibration, the specimen is greatly affected by its inertia, and behaves as a cantilever beam under base excitation in translation. At resonance, this method resembles the vibrating reed method conventionally used in the viscoelasticity community. The loss tangent is obtained from both the width of a resonance peak and a free-decay process. As for fatigue measurement, we implement a control algorithm into Lab View to maintain maximum displacement of the specimen during the course of the experiment. The fatigue S-N curves are obtained.
机译：对纳米层薄膜的能量耗散和疲劳性能的研究不如整体性能好。现有的研究能量耗散特性的实验方法，通常使用磁相互作用作为不同频率的驱动力和基于激光的变形测量​​系统，很难应用于二维材料。我们提出了一种新颖的实验方法，通过使用双压电晶片压电致动器驱动悬臂试样的固定端并通过光纤系统监视试样和致动器的位移，从而对薄膜材料进行动态测试。振动时，样品会受到惯性的极大影响，并且在平移的基础激发下表现为悬臂梁。在共振时，该方法类似于粘弹性社区中常规使用的振动簧片方法。损耗角正切是从共振峰的宽度和自由衰减过程获得的。对于疲劳测量，我们在Lab View中实施了一种控制算法，以在实验过程中保持样品的最大位移。获得疲劳S-N曲线。

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