Torsional pendulum system for measuring the shear modulus and internal friction of magnetoelastic amorphous wires

1992 ◽  
Vol 3 (8) ◽  
pp. 735-739 ◽  
Author(s):  
S Atalay ◽  
P T Squire
Keyword(s):  
Internal Friction ◽  
Shear Modulus ◽  
Pendulum System ◽  
Amorphous Wires ◽  
Torsional Pendulum

scholarly journals Elastic constants of fused quartz. Change of young's modulus with temperature

1929 ◽  
Vol 122 (789) ◽  
pp. 274-282 ◽  
Keyword(s):  
Shear Modulus ◽  
Elastic Constants ◽  
Torsional Oscillation ◽  
Elastic Solids ◽  
Continuous Increase ◽  
Rate Of Increase ◽  
Fused Quartz ◽  
Torsional Pendulum ◽  
The Mean ◽  
Good Agreement

When fused quartz is heated, its elastic constants for stretch shear and bulk change all increase, a sharp distinction in behaviour from that of most other elastic solids. An elastically-stretched fibre becomes shorter upon heating, and a strained torsion member reduces its twist for a given twisting effort; and so forth. The changes of shear modulus with temperature have been studied in detail (22 to 98° C.) by Threlfall and later by Horton to about 1000° C., who used methods of experiment based upon the changes in period upon heating, of a torsional pendulum having fused quartz as the elastic member. The results of Horton's experiments showed a continuous increase in modulus up to about 880° C. beyond which temperature the modulus rapidly diminished. At 880° C. the modulus was 5·9 per cent, greater than at 15° C. and the mean rate of increase up to 500° C. was 0·85 × 10 -4 per degree Centigrade. The increase is more rapid at lower temperatures, thus, in the interval 20 to 100° C. mean rate of increase per degree Centigrade was found by Horton to be 1·25 × 10 -4 , which is in good agreement with the earlier determinations made by Threlfall. At still lower temperatures, and using the same method of torsional oscillation, Guye and Einhorn-Bodzechowski showed that the mean temperature coefficient in the interval —194° C. to 0° C. is 1·46 × 10 -4 per degree Centigrade, and that there is no major discontinuity in behaviour in this range.

319 Study of internal friction in wire rope by torsional pendulum

2015 ◽  
Vol 2015.68 (0) ◽  
pp. 119-120
Author(s):  
Kosei Mineo ◽  
Atsuyoshi Miura ◽  
Keiji Imado
Keyword(s):  
Internal Friction ◽  
Wire Rope ◽  
Torsional Pendulum

New device for in-pile measurements of internal friction and shear modulus of specimen

1972 ◽  
Vol 33 (3) ◽  
pp. 886-888 ◽  
Author(s):  
V. S. Karasev ◽  
�. U. Grinik ◽  
V. S. Landsman ◽  
A. I. Efimov
Keyword(s):  
Internal Friction ◽  
Shear Modulus ◽  
New Device
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