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首页> 外文期刊>Advances in Mechanical Engineering >Comparative Numerical Analysis of Sheet Formed into a V-Shaped Die Using Conventional and Electromagnetic Forming Processes
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Comparative Numerical Analysis of Sheet Formed into a V-Shaped Die Using Conventional and Electromagnetic Forming Processes

机译：使用常规和电磁成形工艺将板材成形为V形模具的比较数值分析

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摘要

A comparative and numerical study on the formability of a sheet formed into a V-shaped die using a conventional stamping operation and an electromagnetic forming (EMF) process was performed. To evaluate the damage evolution and failure prediction using a finite-element method (FEM), the Gurson-Tvergaard-Needleman plasticity material model was employed in the numerical simulation. The impact of the sheet with the die generates a complex stress state during the EMF process. Damage suppression due to the tool-sheet interaction may be one of the main factors contributing to the increased formability in the EMF process compared to the conventional forming operation. In addition, a high level of kinetic energy produces high strain-rate constitutive and inertial effects, which delay the onset of necking and may also be responsible for the increased formability using EMF.
机译：对使用常规冲压操作和电磁成型（EMF）工艺成型为V形模具的板材的可成型性进行了比较和数值研究。为了使用有限元方法（FEM）评估损伤演化和破坏预测，在数值模拟中采用了Gurson-Tvergaard-Needleman可塑性材料模型。片材与模具的碰撞在EMF过程中产生了复杂的应力状态。与传统的成型操作相比，由于工具与板材之间的相互作用而导致的损坏抑制可能是导致EMF工艺中可成型性提高的主要因素之一。此外，高水平的动能会产生较高的应变率本构和惯性效应，这会延迟缩颈的发生，也可能是使用EMF导致可成形性提高的原因。

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