A unified description of strain-rate softening instabilities

被引：23
|
作者：
Zaiser, M [1 ]
Hahner, P
机构：
[1] Max Planck Inst Met Forsch, Inst Phys, Heisenbergstr 1, D-70569 Stuttgart, Germany
[2] Commiss European Communities, Joint Res Ctr, Inst Adv Mat, I-21020 Ispra, Va, Italy
[3] Commiss European Communities, Joint Res Ctr, Inst Syst Informat & Safety, I-21020 Ispra, Va, Italy
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 238卷 / 02期
关键词：
plastic instabilities; Portevin Le Chatelier effect; strain localization; strain-rate softening;
D O I：
10.1016/S0921-5093(97)00468-1
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A general constitutive description for strain-rate softening materials is proposed. Critical conditions for the occurrence of plastic instabilities are derived and compared to previously established stability criteria. It is shown that the description applies to a large variety of physical situations. In particular, instabilities due to dynamic strain ageing and thermomechanical coupling are discussed. A simple argument is given to decide whether instability goes along with static or propagative strain localization. (C) 1997 Elsevier Science S.A.
引用
收藏
页码：399 / 406
页数：8
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