Evaluation of the Amplitude-Dependent Internal Friction of Materials under Inhomogeneous Strain

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概要

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• The phenomenology of the internal friction experiments is examined with special attention to the influence of the distribution of vibrational strain. A method is presented for the determination of the strain dependence of internal friction from the data obtained under inhomogeneous strain. It is shown that measured values of internal friction, expressed usually as a function of the maximum strain amplitudesε_m, are dependent on the strain distribution and that the strain-amplitude dependence of internal friction can be obtained by plotting the measured values against the average strain amplitude ε_a, given by ε_a=Kε_m. The factor K can be calculated from the mode of vibration. The result for a cylindrical specimen of common materials shows that K=0.8165 for torsion, 0.8660 for a free longitudinal mode and 0.6059 for a free transverse mode.

• 社団法人応用物理学会の論文
• 1969-01-05

著者

• Asano Shigeru

  Department Of Materials Science And Engineering Nagoya Institute Of Technology

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