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Determination of the plastic strain by spherical indentation of uniaxially deformed sheet metals

Abstract : This work consists of determining the plastic strain value undergone by a material during a forming process using the instrumented indentation technique (IIT). A deep drawing steel DC01 is characterized using tensile, shear and indentation tests. The plastic strain value undergone by this steel during uniaxial tensile tests is determined by indentation. The results show that, the identification from IIT doesn't lead to an accurate value of the plastic strain if the assumption that the hardening law follows Hollomon law is used. By using a F.E. method, it is shown that using a Voce hardening law improves significantly the identification of the hardening law of a pre-deformed material. Using this type of hardening law coupled to a methodology based on the IIT leads to an accurate determination of the hardening law of a pre-deformed material. Consequently, this will allow determining the plastic strain value and the springback elastic strain value of a material after a mechanical forming operation.
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Submitted on : Thursday, May 28, 2015 - 7:10:30 PM
Last modification on : Friday, July 10, 2020 - 4:14:35 PM
Long-term archiving on: : Tuesday, September 15, 2015 - 7:36:47 AM

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Mohamad Idriss, Olivier Bartier, Gerard Mauvoisin, Charbel Moussa, Eddie Gazo-Hanna, et al.. Determination of the plastic strain by spherical indentation of uniaxially deformed sheet metals. ESAFORM 2015, Apr 2015, graz, Austria. pp.950-956, ⟨10.4028/www.scientific.net/KEM.651-653.950⟩. ⟨hal-01157597⟩

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