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Benefits of stress superposition in combined bending-linear flow splitting process

Groche, Peter and Taplick, Christoph and Özel, Mahmut and Mahajan, Pushkar and Stahl, Simon (2016):
Benefits of stress superposition in combined bending-linear flow splitting process.
In: International Journal of Material Forming, pp. 1-11, ISSN 1960-6206, DOI: 10.1007/s12289-016-1325-4, [Online-Edition: http://link.springer.com/10.1007/s12289-016-1325-4],
[Article]

Abstract

Linear flow splitting is a multi-station sheet-bulk metal forming process which allows continuous production of bifurcated profiles without joining, lamination or external heating of sheet metal. This process induces high hydrostatic stresses in the forming zone which leads to an elevated formability of the workpiece material. The aim of this research is to bend linear flow split profiles in transverse direction in a continuous manner. This is achieved by combining the linear flow splitting process with a continuous bending process. An analytical and a numer- ical model are described in this paper which predict bending moments for different radii. Results from both models are vali- dated with experimental results. It is found that combining the linear flow splitting with a bending process leads to a severe reduction in the bending moments due to superposition of stress- es in the forming zone. The superposition maintains the cross sectional shape of the bent profiles. Keywords

Item Type: Article
Erschienen: 2016
Creators: Groche, Peter and Taplick, Christoph and Özel, Mahmut and Mahajan, Pushkar and Stahl, Simon
Title: Benefits of stress superposition in combined bending-linear flow splitting process
Language: English
Abstract:

Linear flow splitting is a multi-station sheet-bulk metal forming process which allows continuous production of bifurcated profiles without joining, lamination or external heating of sheet metal. This process induces high hydrostatic stresses in the forming zone which leads to an elevated formability of the workpiece material. The aim of this research is to bend linear flow split profiles in transverse direction in a continuous manner. This is achieved by combining the linear flow splitting process with a continuous bending process. An analytical and a numer- ical model are described in this paper which predict bending moments for different radii. Results from both models are vali- dated with experimental results. It is found that combining the linear flow splitting with a bending process leads to a severe reduction in the bending moments due to superposition of stress- es in the forming zone. The superposition maintains the cross sectional shape of the bent profiles. Keywords

Journal or Publication Title: International Journal of Material Forming
Uncontrolled Keywords: Linear flowsplitting, Finite element analysis, Bending, Springback
Divisions: 16 Department of Mechanical Engineering > Institut für Produktionstechnik und Umformmaschinen (PtU)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 666: Integral Sheet Metal Design with Higher Order Bifurcations
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
16 Department of Mechanical Engineering
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 29 Jun 2017 06:04
DOI: 10.1007/s12289-016-1325-4
Official URL: http://link.springer.com/10.1007/s12289-016-1325-4
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