Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | 40th North American Manufacturing Research Conference 2012 - Transactions of the North American Manufacturing Research Institution of SME |
| Seiten | 30-39 |
| Seitenumfang | 10 |
| Publikationsstatus | Veröffentlicht - 28 Nov. 2012 |
| Veranstaltung | 40th Annual North American Manufacturing Research Conference, NAMRC40 - Notre Dame, IN, USA / Vereinigte Staaten Dauer: 4 Juni 2012 → 8 Juni 2012 |
Publikationsreihe
| Name | Transactions of the North American Manufacturing Research Institution of SME |
|---|---|
| Band | 40 |
| ISSN (Print) | 1047-3025 |
Abstract
Hot forging dies are exposed to a combination of cyclic thermo-mechanical, tribological and chemical loads. Both, wear on the tool surface as well as fatigue crack initiation are the most frequent causes of tool failure. An integral part of the process design and optimization is the FEA based geometry optimisation of forging tools aiming at service life maximisation. So far, the FEA based estimation of the tool life quantity and the critical wear amount is done in a restricted manner as the cyclic die material behaviour is not described with the required accuracy. Therefore, thermo-mechanical fatigue tests were carried out in the present study in order to characterize and describe the cyclic fatigue and material behaviour of tool steels. Moreover, a model for wear estimation that considers thermal effects on the hardness of the tool material was introduced. As friction modelling plays a major role in FEA of forging processes, an improved friction model has been used. The applied model is able to represent the frictional stress between the workpiece and dies realistically, since it considers the changing stress state between the contact pairs.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Maschinenbau
- Ingenieurwesen (insg.)
- Wirtschaftsingenieurwesen und Fertigungstechnik
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40th North American Manufacturing Research Conference 2012 - Transactions of the North American Manufacturing Research Institution of SME. 2012. S. 30-39 (Transactions of the North American Manufacturing Research Institution of SME; Band 40).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - New developments in the FE simulation of closed die forging processes
AU - Behrens, Bernd Arno
PY - 2012/11/28
Y1 - 2012/11/28
N2 - Hot forging dies are exposed to a combination of cyclic thermo-mechanical, tribological and chemical loads. Both, wear on the tool surface as well as fatigue crack initiation are the most frequent causes of tool failure. An integral part of the process design and optimization is the FEA based geometry optimisation of forging tools aiming at service life maximisation. So far, the FEA based estimation of the tool life quantity and the critical wear amount is done in a restricted manner as the cyclic die material behaviour is not described with the required accuracy. Therefore, thermo-mechanical fatigue tests were carried out in the present study in order to characterize and describe the cyclic fatigue and material behaviour of tool steels. Moreover, a model for wear estimation that considers thermal effects on the hardness of the tool material was introduced. As friction modelling plays a major role in FEA of forging processes, an improved friction model has been used. The applied model is able to represent the frictional stress between the workpiece and dies realistically, since it considers the changing stress state between the contact pairs.
AB - Hot forging dies are exposed to a combination of cyclic thermo-mechanical, tribological and chemical loads. Both, wear on the tool surface as well as fatigue crack initiation are the most frequent causes of tool failure. An integral part of the process design and optimization is the FEA based geometry optimisation of forging tools aiming at service life maximisation. So far, the FEA based estimation of the tool life quantity and the critical wear amount is done in a restricted manner as the cyclic die material behaviour is not described with the required accuracy. Therefore, thermo-mechanical fatigue tests were carried out in the present study in order to characterize and describe the cyclic fatigue and material behaviour of tool steels. Moreover, a model for wear estimation that considers thermal effects on the hardness of the tool material was introduced. As friction modelling plays a major role in FEA of forging processes, an improved friction model has been used. The applied model is able to represent the frictional stress between the workpiece and dies realistically, since it considers the changing stress state between the contact pairs.
KW - Abrasive wear
KW - Finite Element Method (FEM)
KW - Friction modelling
KW - Thermo-mechanical fatigue
UR - http://www.scopus.com/inward/record.url?scp=84869838594&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84869838594
SN - 9781622762477
T3 - Transactions of the North American Manufacturing Research Institution of SME
SP - 30
EP - 39
BT - 40th North American Manufacturing Research Conference 2012 - Transactions of the North American Manufacturing Research Institution of SME
T2 - 40th Annual North American Manufacturing Research Conference, NAMRC40
Y2 - 4 June 2012 through 8 June 2012
ER -