Salje, E. K. H. and Koppensteiner, J. and Schranz, W. and Fritsch, E. (2010) Elastic instabilities in dry, mesoporous minerals and their relevance to geological applications. Mineralogical Magazine, 74 (2). pp. 341-350. DOI https://doi.org/10.1180/minmag.2010.074.2.341
![]() |
PDF
Salje_et_al._-_2010_-_Elastic_instabilities_in_dry,_mesoporous_minerals.pdf Restricted to Registered users only Download (443kB) |
Abstract
The collapse of minerals and mineral assemblies under external stress is modelled using a master curve where the stress failure is related to the relative, effective elastic moduli which are in turn related to the porosity of the sample. While a universal description is known not to be possible, we argue that for most porous materials such as shales, silica, cement phases, hydroxyapatite, zircon and also carbonates in corals and agglomerates we can estimate the critical porosity φc at which small stresses will lead to the collapse of the sample. For several samples we find φc ∼0.5 with an almost linear decay of the bulk moduli with porosity at φc <0.5. The second scenario involves the persistence of elasticity for porosities until almost 1 whereby the bulk modulus decreases following a power law k ∼ (1-φm, m >2, between φ = 0.5 and φ = 1.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | 09AREP; |
Subjects: | 03 - Mineral Sciences |
Divisions: | 03 - Mineral Sciences |
Journal or Publication Title: | Mineralogical Magazine |
Volume: | 74 |
Page Range: | pp. 341-350 |
Identification Number: | https://doi.org/10.1180/minmag.2010.074.2.341 |
Depositing User: | Sarah Humbert |
Date Deposited: | 23 Mar 2012 18:06 |
Last Modified: | 23 Jul 2013 10:03 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/2425 |
Actions (login required)
![]() |
View Item |