Material Identification Using a Bi-Axial Test Machine

Abstract:

This paper shows the identification of material parameters for a DC06 IF steel sheet of 0.8 mm by mechanical tests. The experimental equipment used consists of a tensile test machine, a bi-axial test machine able to perform plane-strain and simple shear tests separately or simultaneously and an optical strain gauge. Tensile, plane-strain and simple shear tests were performed at 0°, 45° and 90° from the sheet rolling direction in order to identify Hill 1948 and Hosford 1979 yield criteria. Two identification methods are used: one based on strain measurements (anistropy coefficients) and the other one based on stress measurements (plastic contours). The results confirm that mechanical tests applying other stress-states than tensile are required to obtain accurate material parameters identification.

• Periodical: Applied Mechanics and Materials (Volumes 3-4)
• Pages: 91-98
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.3-4.91
• Online since: August 2006
• Authors: Paulo Flores, Pierre Moureaux, Anne Marie Habraken
• Keywords: Bi-Axial Equipment, Identification of Material Parameters, Yield Function

References

[1] P. Flores, E. Rondia and A.M. Habraken: Int. Journal Forming Processes. To be published.

[2] H. Pijlman: Sheet material characterisation by multi-axial experiments (Doctoral thesis University of Twente, The Netherlands 2001).

[3] R. Hill: The mathematical theory of plasticity (The Oxford Engineering Sciences Series 1950).

[4] B. Banabic, H. -J. Bunge, K. Pöhlandt and A.E. Tekkaya.: Formability of metallic materials (Springer 2000).

DOI: 10.1007/978-3-662-04013-3

[5] W. Hosford: Materials Science & Engineering A257 (1998) 1 - 8.

[6] T. Kuwabara, S. Ikeda and Y. Asano: Materials Processing and Design NUMIFORM (2004) pp.887-892.