Second-order elasticity theory: Explanation for the high poisson's ratio of the inner core

Falzone A.J. and Stacey F.D. (1980) Second-order elasticity theory: Explanation for the high poisson's ratio of the inner core. Physics of the Earth and Planetary Interiors, 21 4: 371-377. doi:10.1016/0031-9201(80)90140-5


Author Falzone A.J.
Stacey F.D.
Title Second-order elasticity theory: Explanation for the high poisson's ratio of the inner core
Journal name Physics of the Earth and Planetary Interiors   Check publisher's open access policy
ISSN 0031-9201
Publication date 1980-01-01
Sub-type Article (original research)
DOI 10.1016/0031-9201(80)90140-5
Volume 21
Issue 4
Start page 371
End page 377
Total pages 7
Subject 1908 Geophysics
1912 Space and Planetary Science
3101 Physics and Astronomy (miscellaneous)
3103 Astronomy and Astrophysics
Abstract Terms in conventional elasticity theory that are normally neglected become important when the ambient pressure is not negligible in comparison with the elastic moduli. These terms give a pressure dependence to the elastic moduli in addition to that resulting from the pressure dependence of atomic forces. The net effect is to reduce the rigidity moduli and to increase incompressibility, resulting in an increase in Poisson's ratio. It is shown that the value of Poisson's ratio for the inner core (∼0.445) is compatible with a rigid metal, such as iron, which would yield the observed high value when subjected to core pressures.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

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