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An Investigation of Springback Stresses in Deep-Drawn Cups Using Diffraction Techniques
Technical Paper
2005-01-0498
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Prediction of springback has become a major focus in sheet metal forming. Validation of finite element codes that are being developed to predict springback require accurate property data and a more complete understanding of the residual stresses that are involved. To provide experimental data for these calculations, neutron and synchrotron X-ray diffraction measurements were carried out to determine the through-thickness distribution of axial and hoop (or tangential) residual stresses in deep-drawn steel and aluminum cups. The techniques are able to provide true spatial resolutions as low as 0.05 mm for a strain measurement on cups with ≤ 1 mm wall thickness. It was found that the stresses exhibit non-linear gradients through the thickness that also depend on the axial position.
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Authors
- T. Gnaeupel-Herold - National Institute of Standards and Technology
- T. J. Foecke - National Institute of Standards and Technology
- H. J. Prask - National Institute of Standards and Technology
- R. J. Fields - National Institute of Standards and Technology
- L. E. Levine - National Institute of Standards and Technology
- Z. Cedric Xia - FORD Scientific Research Laboratory
- Ulrich Lienert - APS, Argonne National Laboratory
Citation
Gnaeupel-Herold, T., Foecke, T., Prask, H., Fields, R. et al., "An Investigation of Springback Stresses in Deep-Drawn Cups Using Diffraction Techniques," SAE Technical Paper 2005-01-0498, 2005, https://doi.org/10.4271/2005-01-0498.Also In
Innovations in Modeling and Testing of Steel Structures for Automotive Applications, and Front and Rear Bumper Systems
Number: SP-1954; Published: 2005-04-11
Number: SP-1954; Published: 2005-04-11
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