HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Effects of grain-to-grain interactions on hear strain localization in Al-Cu-Li rolled sheets

Abstract : Crystal plasticity finite element simulations of tensile tests on thin polycrys-talline samples with grain orientations representative of the microstructure in Al-Cu-Li rolled sheets are carried out to study the influence of grain-to-grain interactions on plastic strain localization. Anisotropic work-hardening and rate-sensitivity of the material behavior are assumed. The grains are modeled as thin platelets in the through-thickness direction, elongated in the rolling and transverse directions. The only distinctive feature of the present simulations with respect to standard crystal plasticity calculations is the enforcement of tangential continuity conditions on the elastic and plastic distortion rates along grain boundaries, which introduces grain-to-grain interactions and renders the simulations nonlocal. Whereas standard crystal plasticity calculations do not predict any significant plastic strain pattern, slanted shear bands spontaneously emerge throughout the sample in the simulations involving tangential continuity, in agreement with experimental observations. Also in agreement with experimental data, shear banding is delayed when the tensile axis shifts from rolling to transverse direction, and the trend to shear banding is enhanced when grain thickness is decreased, particularly in loading along the rolling direction.
Document type :
Journal articles
Complete list of metadata

Cited literature [43 references]  Display  Hide  Download

Contributor : Claude Fressengeas Connect in order to contact the contributor
Submitted on : Thursday, September 10, 2020 - 4:33:17 PM
Last modification on : Monday, February 7, 2022 - 10:09:12 AM
Long-term archiving on: : Thursday, December 3, 2020 - 2:10:05 AM


Files produced by the author(s)



V. Taupin, J. Chevy, Claude Fressengeas. Effects of grain-to-grain interactions on hear strain localization in Al-Cu-Li rolled sheets. International Journal of Solids and Structures, Elsevier, 2016, 99, pp.71-81. ⟨10.1016/j.ijsolstr.2016.07.023⟩. ⟨hal-02935792⟩



Record views


Files downloads