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Title: Modeling of Springback Behavior in AA6016-T4 Sheet via an Elastoplastic Self-consistent Model Incorporating Backstress
Automotive stampings undergo complex strain paths during drawing, stretching, and bending operations which develop large plastic strain gradients within the material. Aluminum sheet alloys are increasingly used for vehicle structure lightweighting, but limited formability and high levels of springback present challenges to the manufacturing and assembly processes. The current work explores the springback levels in AA6016-T4 sheet after pure bending operations. Finite element modeling is performed using both isotropic and elasto-plastic self-consistent (EPSC) crystal plasticity approaches. The EPSC model incorporates backstresses informed by GND content, as measured via high-resolution EBSD. Its predictions are shown to be more accurate than those of the isotropic model. The benefits and limitations of the current EPSC model are discussed.  more » « less
Award ID(s):
1926662
PAR ID:
10359031
Author(s) / Creator(s):
Editor(s):
Dmitry Eskin
Date Published:
Journal Name:
Light Metals 2022
Page Range / eLocation ID:
267-273
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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