Material Flow Curve Influence on Macroscopic Residual Stresses in the Workpiece Bottom in High-Pressure Sheet Metal Forming

Abstract:

Article Preview

The further development of innovative forming processes like sheet metal hydroforming is only possible with the help of detailed knowledge about the workpiece properties and their formation depending on the process strategy. Up to now, the knowledge about the formation of macroscopic residual stresses in high-pressure sheet metal forming (HBU), regarding the influence of the sheet material properties, is still insufficient. The characteristics of the specific forming procedure HBU lead to specific stress and strain gradients in the sheet cross-section, and therefore lead to a characteristic distribution of the induced macroscopic residual stresses, particularly in the workpiece bottom zone. This paper decribes the investigations on the influence of the sheet material flow curve on the macroscopic residual stress distribution in the workpiece bottom.

Info:

Periodical:

Materials Science Forum (Volumes 524-525)

Edited by:

W. Reimers and S. Quander

Pages:

173-178

DOI:

10.4028/www.scientific.net/MSF.524-525.173

Citation:

R. Krux et al., "Material Flow Curve Influence on Macroscopic Residual Stresses in the Workpiece Bottom in High-Pressure Sheet Metal Forming ", Materials Science Forum, Vols. 524-525, pp. 173-178, 2006

Online since:

September 2006

Export:

Price:

$35.00

[1] D. Schmoeckel, C. Hielscher, R. Huber, M. Geiger: Metal Forming of Tubes and Sheets with Liquid and Other Flexible Media. Annals of the CIRP, 48/2, (1999), pp.497-513.

DOI: 10.1016/s0007-8506(07)63230-2

[2] M. Kleiner, W. Homberg, A. Brosius: Processes and Control of Sheet Metal Hydroforming. Advanced Technology of Plasticity, Vol. II, (1999), pp.1243-1252.

[3] W. Homberg: Investigations on the Process Control and on the Manufacturing System of the High-Pressure Sheet Metal Forming. Dr. -Ing. thesis (in German), Universität Dortmund, (2000).

[4] E. v. Finckenstein, U. Preckel: Entstehung und Ermittlung von Eigenspannungen erster Art in Biege- und Tiefziehteilen. Annals of the CIRP, 35/1, (1986), pp.413-416.

DOI: 10.1016/s0007-8506(07)61918-0

[5] L. Brückner: Eigenspannungen und Korrosionsbeständigkeit tiefgezogener Werkstücke aus CuZn-Werkstoffen. Blech Rohre Profile 37/10, (1990), pp.703-706.

DOI: 10.1007/978-3-662-06835-9_1

[6] R. Krux: Manufacturing of Property-Optimised Components Using the High-Pressure Sheet Metal Forming and Analysis of the Induced Residual Stresses. Dr. -Ing. thesis (in German), Universität Dortmund, (2003).

[7] M. Kleiner, R. Krux, W. Homberg: Analysis of Residual Stresses in High-Pressure Sheet Metal Forming. Annals of the CIRP, 53/1, (2004), pp.211-214.

DOI: 10.1016/s0007-8506(07)60681-7

[8] N.N.: Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain-Gage Method. ASTM E837 (1995).

DOI: 10.1520/e0837

[9] T. Schwarz, H. Kockelmann: Die Bohrlochmethode - ein für viele Anwendungsbereiche optimales Verfahren zur experimentellen Ermittlung von Eigenspannungen. Messtechnische Briefe 29/2, (1993), pp.33-38.

[10] F. Haase: Residual Stress Determination in Thin-Walled Components and Composites. Dr. -Ing. thesis (in German), Universität Dortmund, (1998).

In order to see related information, you need to Login.