Abstract
Extreme pressures of several megabars are produced during compression of sample and gasket within a diamond anvil cell. This study uses finite-element simulations to analyze the effects of culet geometry, bevel angle, sample thickness, and the sample-gasket system. Multiple experimental phenomena are reproduced and interpreted. These results improve our understanding of material mechanical response under extreme pressure and large elastoplastic deformation, to benefit optimal design of the diamond anvil cells that are key to high-pressure research, and thus the search for and study of $e.g.$ metallic hydrogen.
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