On the nonlinear anelastic behaviour of AHSS

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Abstract

It has been widely observed that below the yield stress the loading/unloading stress-strain curves of plastically deformed metals are in fact not linear but slightly curved, showing a hysteresis behaviour during unloading/reloading cycles. In addition to the purely elastic strain, extra dislocation based micro-mechanisms are contributing to the reversible strain of the material which results in the nonlinear unloading/reloading behaviour. This extra reversible strain is the so called anelastic strain. As a result, the springback will be larger than that predicted by FEM considering only the recovery of the elastic strain. In this work the physics behind the anelastic behaviour is discussed and experimental results for a dual phase steel are demonstrated. Based on the physics of the phenomenon a model for anelastic behaviour is presented that can fit the experimental results with a good accuracy.
Original languageEnglish
Title of host publicationNUMISHEET 2016: 10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes
EditorsR. Cardoso, E. De Souza Neto, J.M.A. César de Sá, O.B. Adetoro
PublisherIOP Publishing
Pages-
DOIs
Publication statusPublished - 4 Sep 2016
Event10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2016 - Bristol, United Kingdom
Duration: 4 Sep 20169 Sep 2016
Conference number: 10

Publication series

Name
PublisherIOP Publishing
Volume734
ISSN (Print)1742-6588
ISSN (Electronic)1742-6596

Conference

Conference10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2016
Abbreviated titleNUMISHEET 2016
CountryUnited Kingdom
CityBristol
Period4/09/169/09/16
Other04-09-2016 - 09-09-2016

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Keywords

  • IR-102458
  • METIS-319398

Cite this

Torkabadi, A., Meinders, V. T., & van den Boogaard, A. H. (2016). On the nonlinear anelastic behaviour of AHSS. In R. Cardoso, E. De Souza Neto, J. M. A. César de Sá, & O. B. Adetoro (Eds.), NUMISHEET 2016: 10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (pp. -). IOP Publishing. https://doi.org/10.1088/1742-6596/734/3/032100