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Apparatus for the Measurement of the Internal Friction of Metals in Transverse Vibration

机译:测量金属在横向振动中的内部摩擦的装置

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摘要

Apparatus incorporating a specially designed piezoelectric pickup serving in turn as an exciter and detector is described for the measurement of the internal friction of vertically suspended specimens vibrating transversely in vacuo in the free‐free mode. Measurements have been made by the free‐decay method in the frequency range 5 cy/sec‐2 kc/sec, and at maximum strain‐amplitudes of 10-4-5×10-7. The method of frequency variation by loading with weights has been applied successfully to the fundamental vibration. Methods of investigating external energy losses are described, and results presented to show that the total external loss is small, rarely exceeding 5% of the observed internal friction.
机译:描述了一种装有专门设计的压电拾音器的设备,该拾音器又用作激励器和检测器,用于测量在自由模式下在真空中横向振动的垂直悬浮样品的内部摩擦。通过自由衰减法在5 cy / sec-2 kc / sec的频率范围内进行了测量,并且最大应变幅度为10-4-5×10-7。通过加载重物进行频率变化的方法已成功应用于基本振动。描述了研究外部能量损失的方法,结果表明,总外部损失很小,很少超过观察到的内部摩擦的5%。

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  • 来源
    《Review of Scientific Instruments》 |1955年第9期|共4页
  • 作者

    Berry B. S.;

  • 作者单位

    Department of Metallurgy, University of Manchester, England;

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  • 正文语种 eng
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