Issue 53

R. Harbaoui et alii, Frattura ed Integrità Strutturale, 53 (2020) 295-305; DOI: 10.3221/IGF-ESIS.53.23 295 Mechanical behavior of materials with a compact hexagonal structure obtained by an advanced identification strategy of HCP material, AZ31B-H24 R. Harbaoui, O. Daghfas, A. Znaidi Laboratory of Applied Mechanics and Engineering LR-MAI University Tunis El Manar-ENIT BP37- Le belvédère,1002, Tunis rym.harbaoui@gmail.com , daghfasolfa@yahoo.fr , amnaznaidi@laposte.tn V. Tuninetti Departament of Mechanical Engineering, Universidad de La Frontera, Francisco Salazar 01145, Temuco 4780000, Chile. victor.tuninetti@ufrontera.cl A BSTRACT . The use of magnesium alloys, in particular AZ31B-H24, represents an increasingly important aspect in the transport field, as well as in the aeronautical industry. In the forming processes of this material, the shapes of the product are obtained by plastic deformation. Therefore, it is important to know the properties of plastic behavior to optimize these shaping processes. The properties of this alloy are strongly influenced by its complex microstructure which can be modified by plastic deformation. For this purpose, in this work an identification strategy is established beginning with the elastoplastic orthotropic law based on the choice of an equivalent stress, a hardening law and a plastic potential. Thus, the anisotropic behavior of the magnesium sheet is modeled using CPB06 criterion with four hardening laws then later compared to Barlat91 criterion. Once the model is validated, it would therefore be useful to study the plastic behavior of AZ31B-H24 from an experimental database. K EYWORDS . Magnesium; Model; Plastic deformation; Strategy; Anisotropy. Citation: Harbaoui, R., Daghfas, O., Znaidi, V. Tuninetti A., Mechanical behavior of materials with a compact hexagonal structure obtained by an identification strategy, Case of study: Application on AZ31B-H2 Mg alloy, Frattura ed Integrità Strutturale, 53 (2020) 295-305. Received: 07.02.2020 Accepted: 14.05.2020 Published: 01.07.2020 Copyright: © 2019 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION he magnesium alloy has been praised by the greatest number of experts in materials engineering due to its low density, high thermal conductivity and rigidity, excellent mechanical and damping properties as well as excellent flowability [1-3]. In particular, the magnesium alloy material is a promising project in the transport sector. Magnesium alloy sheets (AZ31B) have different mechanical responses than steel and aluminum sheets and have a highly anisotropic behavior due to their compacted hexagonal crystal structure (HCP) and strong basal crystallographic texture T