Details
| Original language | English |
|---|---|
| Pages (from-to) | 254-269 |
| Number of pages | 16 |
| Journal | Journal of Materials Processing Technology |
| Volume | 237 |
| Publication status | Published - 11 Jun 2016 |
Abstract
The formability of deep drawing can be extended by combining it with a subsequent high-speed forming method such as electromagnetic forming. However, up to now, no sufficient systematic understanding of the underlying principles or of a successful design of such coupled processes has been gained. Hence, in this work, a methodology for the analysis and design of such process chains is presented. This approach comprises a new method for the experimentally based determination of quasi-static and high-speed forming limits along close to proportional strain paths, a constitutive visco-plastic, anisotropic material model with a rate dependent ductile damage formulation, which allows for the accurate numerical prediction of forming limits for complicated forming operations under a largely varying strain rate, and finally the actual application of both to a combined quasi-static and high-speed forming operation. In doing so, material areas are identified that are deep drawn up to a degree immediately before necking occurs and then electromagnetically be formed beyond the quasi-static forming limit without damage. This proves that an extension of formability is here achieved due to a change in strain rate rather than in the strain path.
Keywords
- Electromagnetic-mechanically coupled finite element simulation, Forming limit diagram, High strain rate experiments, High-speed forming, Material characterization, Viscoplastic damage modelling
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Computer Science(all)
- Computer Science Applications
- Materials Science(all)
- Metals and Alloys
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Journal of Materials Processing Technology, Vol. 237, 11.06.2016, p. 254-269.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Experimental and numerical investigation of increased formability in combined quasi-static and high-speed forming processes
AU - Kiliclar, Y.
AU - Demir, O. K.
AU - Engelhardt, M.
AU - Rozgić, M.
AU - Vladimirov, I. N.
AU - Wulfinghoff, S.
AU - Weddeling, C.
AU - Gies, S.
AU - Klose, C.
AU - Reese, S.
AU - Tekkaya, A. E.
AU - Maier, H. J.
AU - Stiemer, M.
N1 - Funding information: The authors would like to thank the German Research Foundation ( DFG ) for its financial support.
PY - 2016/6/11
Y1 - 2016/6/11
N2 - The formability of deep drawing can be extended by combining it with a subsequent high-speed forming method such as electromagnetic forming. However, up to now, no sufficient systematic understanding of the underlying principles or of a successful design of such coupled processes has been gained. Hence, in this work, a methodology for the analysis and design of such process chains is presented. This approach comprises a new method for the experimentally based determination of quasi-static and high-speed forming limits along close to proportional strain paths, a constitutive visco-plastic, anisotropic material model with a rate dependent ductile damage formulation, which allows for the accurate numerical prediction of forming limits for complicated forming operations under a largely varying strain rate, and finally the actual application of both to a combined quasi-static and high-speed forming operation. In doing so, material areas are identified that are deep drawn up to a degree immediately before necking occurs and then electromagnetically be formed beyond the quasi-static forming limit without damage. This proves that an extension of formability is here achieved due to a change in strain rate rather than in the strain path.
AB - The formability of deep drawing can be extended by combining it with a subsequent high-speed forming method such as electromagnetic forming. However, up to now, no sufficient systematic understanding of the underlying principles or of a successful design of such coupled processes has been gained. Hence, in this work, a methodology for the analysis and design of such process chains is presented. This approach comprises a new method for the experimentally based determination of quasi-static and high-speed forming limits along close to proportional strain paths, a constitutive visco-plastic, anisotropic material model with a rate dependent ductile damage formulation, which allows for the accurate numerical prediction of forming limits for complicated forming operations under a largely varying strain rate, and finally the actual application of both to a combined quasi-static and high-speed forming operation. In doing so, material areas are identified that are deep drawn up to a degree immediately before necking occurs and then electromagnetically be formed beyond the quasi-static forming limit without damage. This proves that an extension of formability is here achieved due to a change in strain rate rather than in the strain path.
KW - Electromagnetic-mechanically coupled finite element simulation
KW - Forming limit diagram
KW - High strain rate experiments
KW - High-speed forming
KW - Material characterization
KW - Viscoplastic damage modelling
UR - http://www.scopus.com/inward/record.url?scp=84976406275&partnerID=8YFLogxK
U2 - 10.1016/j.jmatprotec.2016.06.007
DO - 10.1016/j.jmatprotec.2016.06.007
M3 - Article
AN - SCOPUS:84976406275
VL - 237
SP - 254
EP - 269
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
SN - 0924-0136
ER -