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Open AccessArticle

Ultimate Mechanical Properties of Forsterite

1
Univ. Lille, CNRS, INRA, ENSCL, UMR 8207-UMET-Unité Matériaux et Transformations, F-59000 Lille, France
2
Institut Universitaire de France, 1 rue Descartes, F-75005 Paris, France
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(12), 787; https://doi.org/10.3390/min9120787
Received: 21 November 2019 / Revised: 11 December 2019 / Accepted: 12 December 2019 / Published: 14 December 2019
(This article belongs to the Special Issue Mineral Physics—In Memory of Orson Anderson)
The ultimate mechanical properties, as characterized here by the ideal strengths of Mg2SiO4 forsterite, have been calculated using first-principles calculations and generalized gradient approximation under tensile and shear loading. The ideal tensile strengths (ITS) and ideal shear strengths (ISS) are computed by applying homogeneous strain increments along high-symmetry directions ([100], [010], and [001]) and low index shear plane ((100), (010), and (001)) of the orthorhombic lattice. We show that the ultimate mechanical properties of forsterite are highly anisotropic, with ITS ranging from 12.1 GPa along [010] to 29.3 GPa along [100], and ISS ranging from 5.6 GPa for simple shear deformation along (100) to 11.5 GPa for shear along (010). View Full-Text
Keywords: forsterite; ultimate mechanical properties; ideal tensile strength; ideal shear strength forsterite; ultimate mechanical properties; ideal tensile strength; ideal shear strength
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Gouriet, K.; Carrez, P.; Cordier, P. Ultimate Mechanical Properties of Forsterite. Minerals 2019, 9, 787.

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