Analysis of the dynamic propagation of adiabatic shear bands

被引：72

作者：

Bonnet-Lebouvier, AS ^{[1
]}

Molinari, A ^{[1
]}

Lipinski, P ^{[1
]}

机构：

[1] Univ Metz, Ecole Nat Ingn Metz, ISGMP, UMR CNRS 7554,Lab Phys & Mecan Mat, F-57045 Metz 01, France

来源：

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2002年 / 39卷 / 16期

关键词：

adiabatic shear band; shear band speed; thermal softening; process zone;

D O I：

10.1016/S0020-7683(02)00244-5

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The dynamic propagation of adiabatic shear bands is analysed. In the numerical simulations, a layer of finite length and finite thickness is subjected to shear loading. After a transient, a steady state is attained in which adiabatic shear bands propagate with a constant velocity. The evolution of the shear band speed is determined as a function of the applied velocity. A dimensional analysis allows to determine a general law describing the influence of each problem's parameter on the shear band speed. The effects of heat conduction are discussed in details. Finally the concept of a process zone is introduced. The process zone is a region propagating with the shear band tip, where an intense stress softening is produced by thermo-mechanical coupling. it is shown how the shear band propagation is controlled by this stress softening. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：4249 / 4269

页数：21

共 24 条

[1] THERMO-PLASTIC INSTABILITY IN SIMPLE SHEAR [J].