Automatic Torsion Pendulum for the Continuous Recording of Internal Friction at Constant Amplitude and Very Low Frequencies

1965 ◽  
Vol 36 (2) ◽  
pp. 198-201 ◽  
Author(s):  
A. Salvi ◽  
D. Dautreppe ◽  
E. Friess
Keyword(s):  
Internal Friction ◽  
Continuous Recording ◽  
Torsion Pendulum ◽  
Constant Amplitude ◽  
Low Frequencies

The continuous recording of damping at constant amplitude

1967 ◽  
Vol 44 (2) ◽  
pp. 169-172 ◽  
Author(s):  
J Perez ◽  
J Delorme ◽  
P Peguin ◽  
P Gobin
Keyword(s):  
Continuous Recording ◽  
Constant Amplitude

On: “Frequency‐independent background internal friction in heterogeneous solids” by Baxter H. Armstrong (GEOPHYSICS, June 1980, p. 1042–1054).

Geophysics ◽  
1981 ◽  
Vol 46 (9) ◽  
pp. 1314-1314 ◽  
Author(s):  
Gábor Korvin
Keyword(s):  
Internal Friction ◽  
Frequency Dependence ◽  
Attenuation Coefficient ◽  
Thermal Conduction ◽  
Heterogeneous Solids ◽  
Low Frequencies ◽  
Novel Approach ◽  
Frequency Independent ◽  
Inherent Frequency

In his recent paper Dr. Armstrong proposes a novel approach based on considerations of thermal conduction and thermoelastic dissipation to explain the observed nearly constant Q behavior toward low frequencies in randomly heterogeneous solids. I feel, however, the fluctuation coefficient R defined by his equation (22) does have an inherent frequency dependence introduced through the [Formula: see text] factors so that the attenuation coefficient A might be a more complicated function of frequency than suggested by equation (24).

scholarly journals A simple torsion pendulum for measuring internal friction

JOM ◽  
1950 ◽  
Vol 2 (11) ◽  
pp. 1322-1322
Author(s):  
M. E. Fine
Keyword(s):  
Internal Friction ◽  
Torsion Pendulum

VERY LOW FREQUENCIES INTERNAL FRICTION MEASUREMENTS OF ICE Ih

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-541-C5-546 ◽  
Author(s):  
J. Tatibouet ◽  
J. Perez ◽  
R. Vassoille
Keyword(s):  
Internal Friction ◽  
Low Frequencies ◽  
Friction Measurements
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