Frequency effect on electromagnetic free impacting velocity

Y. Y. Chu, V. Psyk, A. E. Tekkaya, R. S. Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A free impacting sheet forming experiment was designed to examine the influence of charging energy and frequency on the acceleration and impacting velocity caused by the Lorentz Force. The skin effect under the same frequency with workpieces of different thickness was also studied to clarify the influence of frequency. The ratio of thickness-to-skin depth varied from 0.78 to 1.17. In this study, a high-speed camera was used to record the free flying process, from which the retrieved images were used to characterize the forming velocity. Additionally, the electromagnetic module of Ls-Dyna software performed a fully coupled mechanical and electromagnetic simulation. The deviation between the simulation and the experiment was less than 10%. According to the simulation and experimental results, the frequency seems to have a more significant effect than the skin depth on electromagnetic forming. When the frequency is higher, the variation in acceleration fits the duration time of the first pulse of current. Additionally, in the frequency range between 4 kHz and 11.3 kHz, the skin effect is not a critical parameter and can be neglected.

Original languageEnglish
Title of host publicationProceedings of the 10th International Conference on Technology of Plasticity, ICTP 2011
Pages1148-1153
Number of pages6
Publication statusPublished - 2011 Dec 1
Event10th International Conference on Technology of Plasticity, ICTP 2011 - Aachen, Germany
Duration: 2011 Sep 252011 Sep 30

Publication series

NameProceedings of the 10th International Conference on Technology of Plasticity, ICTP 2011

Other

Other10th International Conference on Technology of Plasticity, ICTP 2011
CountryGermany
CityAachen
Period11-09-2511-09-30

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics

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