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- W2612297907 abstract "In the defense community, fracture and fragmentation theory and associated computational models are used to produce descriptions of material damage as well as fragment sizes, velocities, and trajectories for fragmenting warheads and back‐of‐the‐armor debris. Whereas previously such models depended almost exclusively on empirical correlations, emerging physics models of the fracture and fragmentation process that are based on laboratory‐measured properties of materials are now available. The models fall into two levels of sophistication, (1) end‐state fragmentation models based on extensions of Griffith’s energy‐balance approach to fracture, and (2) damage evolution models based on characterization of the material’s microstructural failure modes. The energy‐balance models have the great advantage of simplicity, whereas the microstructural failure models have the advantage of describing the gradual evolution of damage from activation of inherent flaws to microcrack coalescence resulting in fragmentation. Both types of models have been used successfully in conjunction with finite element computer codes to predict fragment sizes, velocities, and trajectories. This paper presents a short review of the above models and concludes with a description of a class of models of intermediate complexity that retain relative simplicity while including dependence on key microstructural features of the material." @default.
- W2612297907 created "2017-05-19" @default.
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- W2612297907 date "1994-01-01" @default.
- W2612297907 modified "2023-09-27" @default.
- W2612297907 title "Computer models of dynamic fracture and fragmentation" @default.
- W2612297907 doi "https://doi.org/10.1063/1.46047" @default.
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