An elastic-visco-plastic analysis of ductile expanding ring

被引：65
|
作者：
Zhou, F. [1 ]
Molinari, J. F. [1 ]
Ramesh, K. T. [1 ]
机构：
[1] Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA
来源：
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 2006年 / 33卷 / 1-12期
关键词：
ductile fragmentation; expanding ring; necking pattern; fragment size; size distribution;
D O I：
10.1016/j.ijimpeng.2006.09.070
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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.
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页码：880 / 891
页数：12
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