On the effect of current pulses on the material behavior during electromagnetic metal forming
On the effect of current pulses on the material behavior during electromagnetic metal forming
复制标题
电磁金属成形过程中电流脉冲对材料行为的影响
DOI：
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复制
发表时间：
2006
期刊：
影响因子：
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通讯作者：
L. Walden
中科院分区：
文献类型：
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作者：
F. Bach;H. Blum;M. Stiemer;B. Svendsen;J. Unger;L. Walden
Electromagnetic sheet metal forming (EMF) is an example of a high-speed forming process driven by the dynamics of a coupled electromagnetic-mechanical system. Basic physical processes involved in EMF, such as e.g. inelastic and hardening behavior or inertia, have been considered in previous works [1, 2]. The purpose of the current work is the investigation of temperature development during EMF and a possible reduction in the yield stress due to electric currents. While thermoelastic and viscoplastic effects are well-understood in this context [3], the possible influence of electric currents on dislocation motion, generally referred to as the electro-plastic effect [4, 5], is still an unresolved issue. In agreement with previous works [e.g., 6], it is concluded here that such an effect is at most of second-order and can most likely be safely neglected in the modeling and simulation of industrial EMF.
