期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 211, 期 8, 页码 1457-1464出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2011.03.018
关键词
Hopkinson tensile bar; High strain rate; High speed forming; Forming limit diagram; Constitutive modelling
资金
- IWT (Agentschap voor Innovatie door Wetenschap en Technologie - Flemish government agency for Innovation by Science and Technology) [IWT 070644]
- Interuniversity Attraction Poles Program phase 6 of the Federal Science Policy of Belgium for the funding of research project m3phys [IUAP P6/24]
The strain rate dependence of plastic yield and failure properties displayed by most metals affects energies, forces and forming limits involved in high speed forming processes. This paper investigates the influence of the strain rate on the forming properties of one laboratory made and three commercial steel grades: a CMnAl TRIP steel, the ferritic structural steel S235JR, the drawing steel DC04 and the ferritic stainless steel AISI 409. First, split Hopkinson tensile bar (SHTB) experiments are carried out to assess the influence of the strain rate on the materials' stress-strain curves. Subsequently, the obtained SHTB results, together with static tensile test results, are used to model the constitutive behaviour of the investigated steels using the phenomenological Johnson-Cook (JC) model and the Voce model, thus allowing dynamic modelling of forming processes. Finally, forming limit diagrams (FLDs) are calculated using the Marciniak-Kuczynski method. The results clearly show that the effect of the strain rate on forces and energies involved in a forming process, and the forming limits is non-negligible and strongly material dependent. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据