Enhancements to the Tonge-Ramesh Ceramic Failure Model for Use in Eulerian Simulations

Report No. ARL-TR-7766
Authors: Andrew L Tonge
Date/Pages: September 2016; 52 pages
Abstract: The Tonge-Ramesh material model has been incorporated into 3 computational frameworks (EPIC, ALE3D, and ALEGRA) used by the US Army Research Laboratory for the simulation of terminal ballistic problems. Southwest Research Institute (SwRI) report number 1817637.03 noted that in the Lagrangian code EPIC, the Tonge-Ramesh model was relatively robust but was computationally expensive compared to simpler models, like Johnson-Holmquist-Beissel, and the damaged material was too strong. This work confirms the SwRI findings when using a different numerical method and identifies further limitations of the original model when it is used in an advecting framework. A simplified version of the model that is faster, more robust, and better suited for use in codes with advection, like ALE3D, is presented in this work along with evaluations of both the original and the updated models in ALE3D.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2016