Lattice Finite Strain Theory for Non-hydrostatically Compressed Materials
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The purpose of this paper is to describe the nonlinear behaviour of geomaterials within the principles of thermodynamics. The main components of this contribution are (1) a new method to estimate the properties of minerals subjected to the non-hydrostatic compression in diamond anvil cell using the finite strain theory is introduced and (2) a proper measure of deformation that applies to a wide range of minerals is identified. This research work shows that the logarithmic (Hencky) strain produces a good agreement with experiments for a wide range of materials.
KeywordsThermodynamics Diamond anvil cell Lattice finite strain theory Logarithmic strain
The authors are grateful for fundings by the Australian Research Council through Grant DP170104205 and The Omani Research Council through the Grant ORG/DU/EI/14/02.