MULTISCALE ENTROPY ANALYSIS OF THE PORTEVIN-LE CHATELIER EFFECT IN AN Al-2.5%Mg ALLOY

被引：17
作者：
Sarkar, A. [1 ]
Barat, P. [2 ]
Mukherjee, P. [2 ]
机构：
[1] Bhabha Atom Res Ctr, Mech Met Sect, Mat Grp, Bombay 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, India
来源：
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY | 2010年 / 18卷 / 03期
关键词：
Multiscale Entropy Analysis; Complexity; Portevin-Le Chatelier Effect; TIME-SERIES ANALYSIS; DEFORMATION; COMPLEXITY; CHAOS; MODEL;
D O I：
10.1142/S0218348X10004944
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
The complexity of the Portevin-Le Chatelier effect in Al-2.5% Mg polycrystalline samples subjected to uniaxial tensile tests is quantified. Multiscale entropy analysis is carried out on the stress time series data observed during jerky flow to quantify the complexity of the distinct spatiotemporal dynamical regimes. It is shown that for the static type C band, the entropy is very low for all the scales compared to the hopping type B and the propagating type A bands. The results are interpreted considering the time and length scales relevant to the effect.
引用
收藏
页码：319 / 325
页数：7
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