Strength analysis and optimisation of double-toroidal anvils for high-pressure research

J. Fang, Craig Bull, John Loveday, Richard Nelmes, Konstantin Kamenev

Research output: Contribution to journalArticlepeer-review

Abstract

We used the finite element method for stress and deformation analysis of the large sample volume double-toroidal anvil and gasket assembly used with the Paris-Edinburgh press for neutron scattering, in order to investigate the failure of this assembly observed repeatedly in experiments at a load of approximately 240 tonnes. The analysis is based on a new approach to modelling an opposed anvil device working under extreme stress conditions. The method relies on use of experimental data to validate the simulation in the absence of the material property data available for high pressure conditions. Using this method we analysed the stress distribution on the surface and in the bulk of the
double-toroidal anvils, and we conclude that the failure occurs on the surface of the anvil and that it is caused by the tensile stress. We also use the model to show possible ways of optimising the anvil design in order to extend its operational pressure range.
Original languageEnglish
Article number093902
Number of pages10
JournalReview of Scientific Instruments
Volume83
DOIs
Publication statusPublished - 11 Sep 2012

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