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DOE OSTI · 1630886

An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds

Klima, Matej·Barlow, Andrew·Kucharik, Milan·Shashkov, Mikhail Jurievich
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Abstract

Here, we present a multi-material cell model (closure model) for demanding arbitrary Lagrangian-Eulerian (ALE) simulations of fluids and solids. It is based on the interface-aware sub-scale dynamics (IASSD) approach which utilizes the exact material interface geometry within the computational cell to calculate internal material interactions. Our formulation of the closure model also aims to improve the accuracy in low-speed impact events. Voids are used to represent ambient vacuum and internal free boundaries of the distinct materials. Void regions can close and open at contact surfaces, allowing a transition from contact physics to free motion in vacuum. The coupling of void closure and opening with a new formulation of the IASSD model for solids is tested on several one- and two-dimensional numerical examples, ranging from gas expansion in vacuum to planar and round object impacts at various speeds.

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42 ENGINEERINGLagrangian hydrodynamicsinterface-aware sub-scale dynamics closure modelmulti-material flowssolid mechanicsvoid closurevoid opening

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Klima, Matej, Barlow, Andrew, Kucharik, Milan, Shashkov, Mikhail Jurievich. 2020-05-16. An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds. https://doi.org/10.1016/j.compfluid.2020.104578

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