Details
| Original language | English |
|---|---|
| Title of host publication | Sheet Metal 2023 - 20th International Conference on Sheet Metal |
| Editors | Marion Merklein, Hinnerk Hagenah, Joost R. Duflou, Livan Fratini, Fabrizio Micari, Paulo Martins, Gerson Meschut |
| Pages | 379-386 |
| Number of pages | 8 |
| Publication status | Published - 2023 |
| Event | 20th International Conference on Sheet Metal, SHEMET 2023 - Erlangen, Germany Duration: 2 Apr 2023 → 5 Apr 2023 |
Publication series
| Name | Materials Research Proceedings |
|---|---|
| Volume | 25 |
| ISSN (Print) | 2474-3941 |
| ISSN (electronic) | 2474-395X |
Abstract
Driven by high energy prices and strict legal requirements on CO2 emissions, high-strength sheet steel materials are increasingly gaining importance in the automotive industry regarding electric vehicles and their battery range. Simulation-based design of forming processes can contribute to exploiting their high potential for lightweight design. However, previous studies show that numerical simulation with conventional forming limit curves does not always provide adequate prediction quality. Failure models that take the stress state into account represent an alternative prediction method for the shear-dominated failure, that frequently occur in high-strength steels during forming. The failure behaviour of the sheet materials can be determined by different specimen geometries for a wide range of stress states and by using an optical measurement system to record the local strain on the surface of the specimen at the location of failure. However, for many high-strength steels, critical damage or failure initiation already occurs inside the specimen. Therefore, a method is needed that allows detection of failure initiation at an early stage before the crack becomes visible on the surface of the specimen. One possible method is the use of acoustic emission analysis. By coupling it with an imaging technique, the critical strains leading to failure initiation inside the specimen can be determined. In the presented paper, butterfly tests are performed for a wide range of stress states and measured with an optical as well as an acoustical measurement system. The tests are analysed regarding the failure initiation using a mechanical, optical as well as acoustical evaluation method and compared with each other.
Keywords
- Acoustic Emission, Fracture Analysis, High Strength Steel
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
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Sheet Metal 2023 - 20th International Conference on Sheet Metal. ed. / Marion Merklein; Hinnerk Hagenah; Joost R. Duflou; Livan Fratini; Fabrizio Micari; Paulo Martins; Gerson Meschut. 2023. p. 379-386 (Materials Research Proceedings; Vol. 25).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Evaluating material failure of AHSS using acoustic emission analysis
AU - Stockburger, Eugen
AU - Vogt, Hendrik
AU - Wester, Hendrik
AU - Hübner, Sven
AU - Behrens, Bernd Arno
N1 - Funding Information: The authors gratefully acknowledge the support of the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) within the Project 385276585 ‘‘Improving the failure characterisation of advanced high-strength steel sheets by coupling measurement systems for optical forming analysis with acoustic emission technology’’.
PY - 2023
Y1 - 2023
N2 - Driven by high energy prices and strict legal requirements on CO2 emissions, high-strength sheet steel materials are increasingly gaining importance in the automotive industry regarding electric vehicles and their battery range. Simulation-based design of forming processes can contribute to exploiting their high potential for lightweight design. However, previous studies show that numerical simulation with conventional forming limit curves does not always provide adequate prediction quality. Failure models that take the stress state into account represent an alternative prediction method for the shear-dominated failure, that frequently occur in high-strength steels during forming. The failure behaviour of the sheet materials can be determined by different specimen geometries for a wide range of stress states and by using an optical measurement system to record the local strain on the surface of the specimen at the location of failure. However, for many high-strength steels, critical damage or failure initiation already occurs inside the specimen. Therefore, a method is needed that allows detection of failure initiation at an early stage before the crack becomes visible on the surface of the specimen. One possible method is the use of acoustic emission analysis. By coupling it with an imaging technique, the critical strains leading to failure initiation inside the specimen can be determined. In the presented paper, butterfly tests are performed for a wide range of stress states and measured with an optical as well as an acoustical measurement system. The tests are analysed regarding the failure initiation using a mechanical, optical as well as acoustical evaluation method and compared with each other.
AB - Driven by high energy prices and strict legal requirements on CO2 emissions, high-strength sheet steel materials are increasingly gaining importance in the automotive industry regarding electric vehicles and their battery range. Simulation-based design of forming processes can contribute to exploiting their high potential for lightweight design. However, previous studies show that numerical simulation with conventional forming limit curves does not always provide adequate prediction quality. Failure models that take the stress state into account represent an alternative prediction method for the shear-dominated failure, that frequently occur in high-strength steels during forming. The failure behaviour of the sheet materials can be determined by different specimen geometries for a wide range of stress states and by using an optical measurement system to record the local strain on the surface of the specimen at the location of failure. However, for many high-strength steels, critical damage or failure initiation already occurs inside the specimen. Therefore, a method is needed that allows detection of failure initiation at an early stage before the crack becomes visible on the surface of the specimen. One possible method is the use of acoustic emission analysis. By coupling it with an imaging technique, the critical strains leading to failure initiation inside the specimen can be determined. In the presented paper, butterfly tests are performed for a wide range of stress states and measured with an optical as well as an acoustical measurement system. The tests are analysed regarding the failure initiation using a mechanical, optical as well as acoustical evaluation method and compared with each other.
KW - Acoustic Emission
KW - Fracture Analysis
KW - High Strength Steel
UR - http://www.scopus.com/inward/record.url?scp=85152291364&partnerID=8YFLogxK
U2 - 10.21741/9781644902417-47
DO - 10.21741/9781644902417-47
M3 - Conference contribution
AN - SCOPUS:85152291364
SN - 9781644902400
T3 - Materials Research Proceedings
SP - 379
EP - 386
BT - Sheet Metal 2023 - 20th International Conference on Sheet Metal
A2 - Merklein, Marion
A2 - Hagenah, Hinnerk
A2 - Duflou, Joost R.
A2 - Fratini, Livan
A2 - Micari, Fabrizio
A2 - Martins, Paulo
A2 - Meschut, Gerson
T2 - 20th International Conference on Sheet Metal, SHEMET 2023
Y2 - 2 April 2023 through 5 April 2023
ER -