Investigations of strain rate sensitivity under different stress triaxialities for DC04

Investigations of strain rate sensitivity under different stress triaxialities for DC04

MAIER Lorenz, MARKER Edgar, SCHULZ Fabian, VOLK Wolfram

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Abstract. Understanding the strain rate sensitivity of materials is essential for predicting their behavior in sheet metal forming. While uniaxial tension tests are state of the art in characterizing this sensitivity, the deformation response of materials under different loading conditions can significantly deviate from uniaxial behavior. This paper presents a comprehensive study of the strain rate sensitivity of DC04 through a series of experimental investigations with different strain rates. In addition to uniaxial tension tests, the study investigates the strain rate sensitivity under shear and plane strain tests, providing a comprehensive analysis of strain rate sensitivity across different loading scenarios. The investigation aims to understand how the material responds to varying deformation rates, focusing on characterizing their deformation behavior under various loading conditions. The authors collected experimental data from the material with a DIC system. They analyzed it to derive material-specific parameters that describe their strain rate-dependent responses depending on the stress state. To explain this, the authors calibrated three models: Johnson Cook, Cowper Symonds, and Huh Kang.

Strain Rate Sensitivity, Sheet Metal Forming, Deep Drawing, Stress Triaxiality

Published online 4/24/2024, 10 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: MAIER Lorenz, MARKER Edgar, SCHULZ Fabian, VOLK Wolfram, Investigations of strain rate sensitivity under different stress triaxialities for DC04, Materials Research Proceedings, Vol. 41, pp 2124-2133, 2024


The article was published as article 234 of the book Material Forming

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