Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 450-457 |
| Seitenumfang | 8 |
| Fachzeitschrift | Procedia Manufacturing |
| Jahrgang | 29 |
| Frühes Online-Datum | 4 Apr. 2019 |
| Publikationsstatus | Veröffentlicht - 2019 |
| Veranstaltung | 18th International Conference on Sheet Metal, SHEMET 2019 - Leuven, Belgien Dauer: 15 Apr. 2019 → 17 Apr. 2019 |
Abstract
Due to a high specific strength, magnesium alloys have a high potential to be considered for lightweight solutions in automotive industry. For the numerical design of forming processes, it is important to describe the yielding as well as the fracture behaviour of a material as precisely as possible. In order to fully characterise the fracture behaviour of an AZ31 magnesium sheet alloy at elevated temperatures, a heated test setup for uniaxial tensile machines was developed. The setup allows an adjustment of the load application angle whereby a stress variation is achieved in the centre of the specimen. In order to determine the fracture strain for different temperatures and for varying stress states, a shear stress specimen (also known as butterfly specimen) was considered to perform mechanical experiments by means of this setup. Using numerical simulations, the specific stress development and strain value in the fracture zone, which is needed to calibrate stress state fracture models, was determined for each loading angle and temperature. For this purpose, an orthotropic yield criterion CPB06, which is suitable for depiction of the particular flow behaviour of magnesium alloys (e. g. compression-tension asymmetry), was used. By this means, sufficient data for the calibration of common stress state based fracture models could be provided and the MMC- (Modified Mohr-Coulomb) fracture model was parameterised.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Wirtschaftsingenieurwesen und Fertigungstechnik
- Informatik (insg.)
- Artificial intelligence
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in: Procedia Manufacturing, Jahrgang 29, 2019, S. 450-457.
Publikation: Beitrag in Fachzeitschrift › Konferenzaufsatz in Fachzeitschrift › Forschung
}
TY - JOUR
T1 - Stress-state dependent fracture characterisation and modelling of an AZ31 magnesium sheet alloy at elevated temperatures
AU - Behrens, Bernd Arno
AU - Chugreev, Alexander
AU - Dykiert, Matthäus
N1 - Funding Information: The authors are much obliged to the DFG (Deutsche Forschungsgemeinschaft, German Research Foundation) for the financial support of project 44192561.
PY - 2019
Y1 - 2019
N2 - Due to a high specific strength, magnesium alloys have a high potential to be considered for lightweight solutions in automotive industry. For the numerical design of forming processes, it is important to describe the yielding as well as the fracture behaviour of a material as precisely as possible. In order to fully characterise the fracture behaviour of an AZ31 magnesium sheet alloy at elevated temperatures, a heated test setup for uniaxial tensile machines was developed. The setup allows an adjustment of the load application angle whereby a stress variation is achieved in the centre of the specimen. In order to determine the fracture strain for different temperatures and for varying stress states, a shear stress specimen (also known as butterfly specimen) was considered to perform mechanical experiments by means of this setup. Using numerical simulations, the specific stress development and strain value in the fracture zone, which is needed to calibrate stress state fracture models, was determined for each loading angle and temperature. For this purpose, an orthotropic yield criterion CPB06, which is suitable for depiction of the particular flow behaviour of magnesium alloys (e. g. compression-tension asymmetry), was used. By this means, sufficient data for the calibration of common stress state based fracture models could be provided and the MMC- (Modified Mohr-Coulomb) fracture model was parameterised.
AB - Due to a high specific strength, magnesium alloys have a high potential to be considered for lightweight solutions in automotive industry. For the numerical design of forming processes, it is important to describe the yielding as well as the fracture behaviour of a material as precisely as possible. In order to fully characterise the fracture behaviour of an AZ31 magnesium sheet alloy at elevated temperatures, a heated test setup for uniaxial tensile machines was developed. The setup allows an adjustment of the load application angle whereby a stress variation is achieved in the centre of the specimen. In order to determine the fracture strain for different temperatures and for varying stress states, a shear stress specimen (also known as butterfly specimen) was considered to perform mechanical experiments by means of this setup. Using numerical simulations, the specific stress development and strain value in the fracture zone, which is needed to calibrate stress state fracture models, was determined for each loading angle and temperature. For this purpose, an orthotropic yield criterion CPB06, which is suitable for depiction of the particular flow behaviour of magnesium alloys (e. g. compression-tension asymmetry), was used. By this means, sufficient data for the calibration of common stress state based fracture models could be provided and the MMC- (Modified Mohr-Coulomb) fracture model was parameterised.
KW - Fracture characterisation
KW - Magnesium sheet alloy AZ31
KW - Modified Mohr-Coulomb, Butterfly specimen
UR - http://www.scopus.com/inward/record.url?scp=85072275177&partnerID=8YFLogxK
U2 - 10.1016/j.promfg.2019.02.161
DO - 10.1016/j.promfg.2019.02.161
M3 - Conference article
AN - SCOPUS:85072275177
VL - 29
SP - 450
EP - 457
JO - Procedia Manufacturing
JF - Procedia Manufacturing
SN - 2351-9789
T2 - 18th International Conference on Sheet Metal, SHEMET 2019
Y2 - 15 April 2019 through 17 April 2019
ER -