Acoustic Determination of the Physical Constants of Rubber‐Like Materials
Acoustic Determination of the Physical Constants of Rubber‐Like Materials
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橡胶类材料物理常数的声学测定
DOI：
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发表时间：
1947
期刊：
影响因子：
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通讯作者：
A. Nolle
中科院分区：
文献类型：
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作者：
A. Nolle
橡胶类材料的弹性和粘性常数可以在非常小的应变条件下通过测量声相速度和声衰减来确定。这种材料的衰减通常很高，结果是弹性和粘性常数必须通过涉及衰减和速度的严格关系来计算，而不是通常采用的近似关系。对于薄条中的纵向波的情况，给出了必要的关系。本文介绍了一种测量频率范围为1 ~ 26千周的窄条中声相速度和声衰减的实验方法。样品条的一端由振动发生器驱动。由移动的检测器接收的信号的相位和幅度被自动绘制为沿带沿着距离的函数。在一个特定的样本上。在一系列测量的速度和衰减范围f的误差…
The elastic and viscous constants of rubber‐like materials may be determined, under conditions of very small strain, through measurements of acoustic phase velocity and acoustic attenuation. The attenuation in such materials is usually high, with the result that the elastic and viscous constants must be computed by means of rigorous relations involving attenuation and velocity, rather than the approximate relations which are usually employed. The necessary relations are presented for the case of longitudinal waves in thin strips. An experimental method is described which has been used to measure acoustic phase velocity and attenuation in thin narrow strips in the frequency range from one to 26 kilocycles. One end of the sample strip is driven by a vibration generator. The phase and amplitude of the signal received by a moving detector are plotted automatically as a function of distance along the strip. On a particular sample the r.m.s. error in a series of measurements of velocity and attenuation ranged f...