Internal NIST Research Complementing the Springback Predictability and Agile Precision Sheet Metal Stamping Projects

Published

October 16, 2008

Author(s)

Lyle E. Levine, R E. Thomson, Gabrielle G. Long, David R. Black, Richard J. Fields

Abstract

Finite element modeling of metal forming operations has great potential for decreasing the time and cost of these operations as well as allowing increased precision of the resulting parts. To realize this potential, new constitutive laws must be developed that can accurately predict a material's behavior for large strains and complicated loading paths. The Springback Predictability and Agile Precision Sheet Metal Stamping Projects are working to solve this problem for a few specific metal alloys. In support of these projects, we have developed new measurement and analysis techniques for characterizing the microstructural changes that are directly responsible for the changes in material properties that occur during forming. These techniques include in situ high-resolution diffraction imaging, in situ ultra-small-angle X-ray scattering, and in situ profiling of Bragg peaks. To analyze the results of the scattering measurements, completely new analysis techniques were developed. Data from this program will be used to develop more general constitutive laws that are based upon measured physical parameters.

Citation

NIST Interagency/Internal Report (NISTIR) -

NIST Pub Series

NIST Interagency/Internal Report (NISTIR)

Pub Type

NIST Pubs

Keywords

aluminum, dislocations, forming, sheet metal stamping, springback

Citation

Levine, L. , Thomson, R. , Long, G. , Black, D. and Fields, R. (2008), Internal NIST Research Complementing the Springback Predictability and Agile Precision Sheet Metal Stamping Projects, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed April 25, 2024)