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Experimental and numerical CPFEM-based determination of FLD using biaxial and Nakajima tests: industrial application to deep drawing simulation for FCC and BCC metals

Abstract : This thesis deals with the numerical and experimental determination of Forming Limit Diagram (FLD) for FCC (Aluminum Al6106) and BCC (St14 mild steel) materials. A Marciniak and Kuczynski (1967) model is used to obtain the FLD using two kinds of tests. The first one is based on the Marciniak-Kuczynski (M-K) model implemented in a FEM modeling of biaxial test including an initial band with reduced thickness. The second approach is based on a FEM simulation of the Nakajima test. In the Nakajima test, different strain paths can be obtained by stretching different width size specimens in order to build complete FLD. The predicted FLD is then applied to an industrial case: the deep drawing simulation. CPFEM simulation for the MK biaxial traction test is also performed. Simulations show that the predicted textures depend on the crystallographic structures, strain path and the localization in the metal sheet (safe zone versus defect zone). Several experimental tests were conducted in order to validate the predicted numerical results in Iran (CanHood Home Appliances Company and University of Tehran). Uniaxial, biaxial and Nakajima tests for FCC and BCC are done. The DIC technique is used for strain measurement. The development of crystallographic texture evolution during the tests is captured with XRD technique for several strain paths. A relative good correlation between literature, numerical and experimental tests for FCC and BCC materials is obtained.
Keywords : BCC FCC FLD
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https://hal.archives-ouvertes.fr/tel-03704511
Contributor : Mohammad MIANROODI Connect in order to contact the contributor
Submitted on : Saturday, June 25, 2022 - 5:19:19 AM
Last modification on : Friday, July 1, 2022 - 3:09:01 AM

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  • HAL Id : tel-03704511, version 1

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Mohammad Mianroodi. Experimental and numerical CPFEM-based determination of FLD using biaxial and Nakajima tests: industrial application to deep drawing simulation for FCC and BCC metals. Mechanics of materials [physics.class-ph]. Université de Strasbourg, 2021. English. ⟨tel-03704511⟩

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