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Resources on Electromagnetic and High Velocity
Forming
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Research Group of Glenn S. Daehn |
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Department of Materials Science and Engineering |
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The Ohio State University |
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Electromagnetic free expansion
of Al platecaptured between
images.
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Average
velocity 55 m/s., 3.6 kJ discharge
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coupon 127
x 203 x 0.8 mm.
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High velocity deformation -- without touching the sheet!!
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Go to Daehn Group Page
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Our group is interested in developing high velocity
forming techniques to facilitate aggressive sheet metal forming. Over
the past several years we have shown materials can be stretched to
much higher strains at high velocity versus conventional quasi-static
stretching. We refer to this extended ductility in high velocity conditions
as hyperplasticity . We
have worked in both understanding formability in a fundamental way
and applying this to practical sheet metal forming. One of the most
attractive ways of developing high velocity metal forming is with
electromagnetic forming. Here, an intense electrical pulse from a
capacitor bank flows through an actuator. This produces intense eddy
currents in any nearby conductors which then gives strong mechanical
repulsion. The non-contact launch of an aluminum sheet above is one
such example. The following links describe our work and this general
technology area.
Please note, this page is updated frequently.
Please check back and you will likely see new content.
See our vision of the future of metal forming
Theses advised by Prof. Glenn S. Daehn
in Electromagnetic and High Rate Forming
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M. Altynova, M.S., (1995).
"The Improved Ductility of Aluminum and Copper Rings (Tubes) by Electromagnetic
Forming Technique".
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V. S. Balanethiram, Ph.D., (1996) "Hyperplasticity:
Enhanced Formability of Sheet Metals at High Velocity".
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G. Fenton, M. S., (1996) "Development
of Numerical Tools to Model Plasticity in Aluminum Due to Electromagnetic
Forces".
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M.
Padmanabhan , M. S., (1997) "Wrinkling and Springback in Electromagnetic
Sheet Metal Forming and Electromagnetic Ring Compression".
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W-F. Pon*, Ph.D., (1997)
"A model for Electromagne tic Ring Expansion and its Application to
Material Characterization".
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V. Vohnout
**, Ph.D., (1998) "A Hybrid Quasi-Static/Dynamic Process for Forming
Large Sheet Metal Parts from Aluminum Alloys".
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H.M.
Panshikar M. S., (2000) "Computer Modeling of Electromagnetic
Forming and Impact Welding".
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S. Datta M. S., (2000) "Electromagnetic Forming
and Flanging of Aluminum 6061 Tubes".
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Anthony J. Turner M.S., (2002) "Spot Impact Welding
of Aluminum Sheet.
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* Co-advisor to Steve Bechtel
of Applied Mechanics Program
** Co-Advisor to Rajiv Shivpuri of Industrial Systems and Welding
Engineering |
Downloadable PDF's
Anthony
J. Turner M.S., (2002) "Spot Impact Welding of Aluminum Sheet
Anthony
J. Turner , M.S. Thesis Presentation.
Copyright Notice: The information
on these pages is NOT public domain. Copyright is held by the authors
of the content. You are welcome to browse and use the information depicted
herein in teaching, lectures, presentations and publications, so long
as you acknowledge where it came from. That is, use the same standards
you would use if you took the information from a journal. No guarantees
on accuracy are provided and no liability is accepted for loss or damage
due to the use of the information contained on these pages.
Sponsors:
Primary support for our work featured in this site is provided by the
National Science Foundation , Division
of Design, Manufacture and Industrial Innovation and The Center for
Advanced Materials and Manufacturing of Automotive Components (CAMMAC)
at the Ohio State University.
Comments, questions, etc.,
to Glenn Daehn
Last updated 13 October 2003