Behaviors of three BCC metal over a wide range of strain rates and temperatures: experiments and modeling

被引：327
|
作者：
Khan, AS [1 ]
Liang, RQ [1 ]
机构：
[1] Univ Maryland Baltimore Cty, Dept Mech Engn, Baltimore, MD 21250 USA
来源：
INTERNATIONAL JOURNAL OF PLASTICITY | 1999年 / 15卷 / 10期
关键词：
constitutive models; high strain rate; impact loading; C. Kolsky bar;
D O I：
10.1016/S0749-6419(99)00030-3
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The elastic-plastic behaviors of three body-centered cubic metals, tantalum, tantalum alloy with 2.5% tungsten, and AerMet 100 steel, are presented over a wide range of strains (15%), strain rates (10(-6)-10(4) s(-1)) and temperatures (77-600 degrees F). Johnson-Cook and Zerilli-Armstrong models were found inadequate to describe the observations. A new viscoplastic model is proposed based on these experimental results. The proposed constitutive model gives good correlations with these experimental results and strain-rate jump experiments. In the next paper (Liang, R., Khan A.S., 2000. Behaviors of three BCC metals during non-proportional multiaxial loadings and predictions using a recently proposed model. International Journal of Plasticity, in press), multi-axial loading results on these materials and comparison with the proposed model will be presented. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1089 / 1109
页数：21
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