Time-dependent Springback
Source abstract
Abstract
Draw-bend tests performed some years ago on four aluminum alloys (2008-T4, 5182-O, 6022-T4, and 6111-T4) revealed that specimens can continue to change shape for long periods, up to 15 months, following forming and unloading [1]. Contemporaneous tests of autobody steels (DQSK, AKDQ and HSLA steels) tested under identical conditions showed no such time-dependent springback over a 7 year period [2]. Current, preliminary results for a few advanced high strength steels (DP600, DP800, DP980 and TRIP780) revealed time-dependent springback at room temperature; the sign of the springback reversing for certain combinations of process conditions. Time-dependent behavior of four advanced high strength steel was measured and creep-simulated for various test conditions. Comparisons show qualitative agreement, but the simulations over-predict the magnitude of the effect
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Velocity Impact and Material Behavior · Microstructure and Mechanical Properties of Steels · Metal Forming Simulation Techniques
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References (7)
Show source-provided references
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5. Carden, W.D., Geng, L. M., Matlock, D. K., Wagoner, R. H., Measurement of springback. Int. J. Mech. Sci., 2002. 44: p. 79–101.
6. Grafalo, F., Fundamentals of Creep and Creep Rupture in Metals. 1966, New York: The MacMillan Company.10.1063/1.3048224 ↗
7. Li, K.P., Wagoner, R. H. Simulation of deep drawing with various elements. in Proceedings of NUMESHEET'99. 1999. University of Franche- Compte, Besancon, France.