Chaos and the jerky flow in Al-Mg polycrystals

被引：8

作者：

Ananthakrishna, G

Fressengeas, C

Kubin, LP

机构：

[1] UNIV METZ,LPMM,CNRS,F-57012 METZ 1,FRANCE

[2] INDIAN INST SCI,MAT RES CTR,BANGALORE 560012,KARNATAKA,INDIA

[3] OFF NATL ETUD & RECH AEROSP,LEM,CNRS,F-92322 CHATILLON,FRANCE

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 234卷

关键词：

Al-Mg alloys; chaos; Lyapunov exponent; Portevin Le Chatelier effect;

D O I：

10.1016/S0921-5093(97)00361-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The stress versus time signals generated in Al-3%Mg polycrystalline samples deformed in constant strain rate have been analysed in order to check the prediction that jerky flow should exhibit chaotic behaviour. The analysis was carried out with the help of several complementary methods, showing the existence of a finite correlation dimension and a positive Lyapunov exponent. The results unambiguously show the existence of chaos resulting from the non-linear interaction of four or five degrees of freedom. (C) 1997 Elsevier Science S.A.

引用

页码：314 / 317

页数：4

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