Mechanical hysteresis in rocks at low strain amplitudes and seismic frequencies

McKavanagh B. and Stacey F.D. (1974) Mechanical hysteresis in rocks at low strain amplitudes and seismic frequencies. Physics of the Earth and Planetary Interiors, 8 3: 246-250. doi:10.1016/0031-9201(74)90091-0


Author McKavanagh B.
Stacey F.D.
Title Mechanical hysteresis in rocks at low strain amplitudes and seismic frequencies
Journal name Physics of the Earth and Planetary Interiors   Check publisher's open access policy
ISSN 0031-9201
Publication date 1974
Sub-type Article (original research)
DOI 10.1016/0031-9201(74)90091-0
Volume 8
Issue 3
Start page 246
End page 250
Total pages 5
Subject 1908 Geophysics
1912 Space and Planetary Science
3101 Physics and Astronomy (miscellaneous)
3103 Astronomy and Astrophysics
Abstract A sensitive capacitance displacement transducer has been used to record hysteresis loops in the stress-strain diagrams of laboratory samples of granite, basalt, sandstone and concrete subjected to cyclic axial strains with amplitudes of order 10-5 and periods of 10-300 sec. The ends of the loops are always cusped, whether the load cycle is sinusoidal or not, and at low strain amplitudes the loop shape becomes symmetrical and appears to be independent of amplitude. Thermal relaxation influences the observed loop shapes, so that the strain cycles represent a compromise between adiabatic and isothermal compressions. However, this does not affect the conclusion that stress-strain loops are always cusped. This observation does not appear to be consistent with linear theories of damping of acoustic and seismic waves, which indicate elliptical loops.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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