PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 23 (2019) 15–20

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. The plastic behavi r of some polycrystalline met ls xhibit the Lode dep ndence. There are many yi ld criteria, which are capable of such a d cription. Neve theless, thes criteria predict wrongly the deformation or the stress state or both i some cases. This pap focuses on the comparison of the def rmation p edicted by a classical von Mises yield criterion and advanced model, which covers the Lode depend nce. The comparison was carried o t using t tensile tests of two types of specimens manufactured from the aluminum alloy. The nu erical imulations were conducted in the Abaqus/Explicit finite element commercial code and the material models were implemented using the user subroutine. © 201 9 The Authors. Published by Elsevier B.V. This is an open acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Lode dependent plasticity in the prediction of deformation states of tensile specimens Petr Kubík, Jindřich Petruška, Petr Vosynek, František Šebek * Institute of Solid Mechanics, Mechatronics and Biomechanics; Faculty of Mechanical Engineering; Brno University of Technology ; Technická 2896/2, 616 69 Brno, Czech Republic 9th International Conference on Materials Structure and Micromechanics of Fracture Lode dependent plasticity in the prediction of deformation states of tensile specimens Petr Kubík, Jindřich Petruška, Petr Vosynek, František Šebek * Institute of Solid Mechanics, Mechatronics and Biomechanics; Faculty f Mechanical Engineering; Brno University of Technology ; Technická 2896/2, 616 69 Brno, Czech Republic Abstract Abstract The plastic behavior of some polycrystalline metals exhibit the Lode dependence. There are many yield criteria, which are capable of such a description. Nevertheless, these criteria predict wrongly the deformation or the stress state or both in some cases. This paper focuses on the comparison of the deformation predicted by a classical von Mises yield criterion and advanced model, which covers the Lode dependence. The comparison was carried out using the tensile tests of two types of specimens manufactured from the aluminum alloy. The numerical simulations were conducted in the Abaqus/Explicit finite element commercial code and the material models were implemented using the user subroutine. 1. Introduction The flow behavior is important for accurate numerical simulations, especially in large plastic deformations ( Petruška et al., 2013). Many plasticity models have been developed for the polycrystalline metals, which exhibit negligible anisotropy (Šebek et al., 2018). These models are formulated as functions of the stress state. This description is usually realized through three stress invariants. One of them is the first invariant of stress tensor 1 I , which is defined by 1. Introduction The flow behavior is important for accurate numerical simulations, especially in large plastic deformations ( Petruška et al., 2013). Many plasticity models hav been developed for the polycrystalline metals, which exhibit negligible anisotropy (Šebek et al., 2018). These models are formulated as functions of the stress state. T is description is usually realized through three stress invariants. One of them is the first invariant of stress tensor 1 I , which is defined by Keywords: Advanced plasticity; tensile test; necking; yield function; aluminum alloy. Keywords: Advanced plasticity; tensile test; necking; yield function; aluminum alloy.

* Corresponding author. Tel.: +420-54114-4925; fax: +420-54114-2876. E-mail address: sebek@fme.vutbr.cz * Correspon ing author. Tel.: +420-54114-4925; fax: +420-54114-2876. E-mail address: sebek@fme.vutbr.cz

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.056