An elastic-visco-plastic analysis of ductile expanding ring

We investigate the fragmentation of an elastic visco-plastic ring in the one-dimensional framework. The governing equations include the effects of large deformation, geometric softening, hydrostatic pressure and material's viscoplasticity. Linear perturbation analysis exhibits a rate-dependent dominant necking pattern. Numerical solution of the governing equations includes wave propagations, and shows that the fragment size is controlled by the unloading wave propagations in the ultimate fragmentation stage. The results are compared with experimental data on the fragmentation of uranium rings under different strain-rates. (C) 2006 Elsevier Ltd. All rights reserved.


Published in:
International Journal of Impact Engineering, 33, 1-12, 880-891
Year:
2006
Publisher:
Elsevier
ISSN:
0734-743X
Laboratories:




 Record created 2007-11-14, last modified 2018-03-17


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