STATISTICS OF THE CATASTROPHIC SLIP EVENTS IN THE PORTEVIN-LE CHATELIER EFFECT

被引：146

作者：

LEBYODKIN, MA

BRECHET, Y

ESTRIN, Y

KUBIN, LP

机构：

[1] INST NATL POLYTECH GRENOBLE,THERMODYNAM & PHYSICOCHIM MET LAB,F-38402 ST MARTIN DHERES,FRANCE

[2] UNIV WESTERN AUSTRALIA,DEPT MECH & MAT ENGN,NEDLANDS,WA 6009,AUSTRALIA

[3] OFF NATL ETUD & RECH AEROSP,OM,CNRS,ETUDES MICROSTRUCT LAB,F-92322 CHATILLON,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.74.4758

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The statistics of catastrophic slip associated with discontinuous yielding (the Portevin-Le Chĝtelier effect) is investigated on an Al-Mg alloy. It is shown that a peaked distribution of stress drops changes towards a monotonic one, characterized by a power law with an exponent of -1.1, with increasing temperature and rate of straining. A model describing this behavior is studied, and it is suggested that there exists a formal similarity of the governing equations with those describing instabilities in frictional sliding. The use of discontinuous yielding in a tensile Al-Mg specimen is proposed as a candidate for modeling of earthquake statistics on a crustal fault. © 1995 The American Physical Society.

引用

页码：4758 / 4761

页数：4

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