PSI - Issue 25

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

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Procedia Structural Integrity 25 (2020) 386–393

© 2020 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 VCSI1 organizers © 2020 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 VCSI1 organizers Keywords: Open-cell media, bicontinuous structure, representative volume element, finite element method, progressive failure, 3D microstructure; 1. Introduction Cellular materials form the distinct class of heterogeneous materials, generally represented by the metal foams. Their structure can be characterized as open-cell bicontinuous media with interpenetrating phases, one of which is porous. In our days such type of materials found their application and had become of high importance as light-weight Abstract Hete ogeneous ma er als with bicontinuous foam-like tructure were investigated. T aim of the work was to creat models of failure of repres ntative volu e elements (RVEs) of such materials and t reveal the dependencies of th character of failure processes on the structur l morphology peculiarities. To create models of RVEs with op n-c ll int rpe etr ting structures, appr aches based on th analytical determination of surfaces separati g the two phases were used. Mechanical modeling wa performed with the finite element an lysis using properties d gradatio and element removal techniques. The model ing results obtained for high-dense aluminum f am materials are pr sented. The influence of the size of representative volume element and its volume fraction on the fracture process has been studied. © 2020 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 VCSI1 organizers Keywords: Open-cell media, bicontinuous structure, representative volume element, finite element method, progressive failure, 3D microstructure; 1. Introduction Cellular materials form the distinct class of heter geneous aterials, generally represented by the metal foams. Their struct re can be characterized as open-cell bicontinuous media with interpenetrating hases, one of which is porous. In our days such type of materials found their application and had become of high importance as light-weight 1st Virtual Conference on Structural Integrity - VCSI1 Numerical Investigation of Damage Accumulation and Failure Processes in Random Porous Bicontinuous Media Aleksandr Shalimov a , Mikhail Tashkinov a, * a Perm National Research Polytechnic University, Komsomoslky Ave. 29, Perm 614990, Russia Abstract Heterogeneous materials with bicontinuous foam-like structure were investigated. The aim of the work was to create models of failure of representative volume elements (RVEs) of such materials and to reveal the dependencies of the character of failure processes on the structural morphology peculiarities. To create models of RVEs with open-cell interpenetrating structures, approaches based on the analytical determination of surfaces separating the two phases were used. Mechanical modeling was performed with the finite element analysis using properties degradation and element removal techniques. The modelling results obtained for high-dense aluminum foam materials are presented. The influence of the size of representative volume element and its volume fraction on the fracture process has been studied. 1st Virtual Conference on Structural Integrity - VCSI1 Numerical Investigation of Damage Accumulation and Failure Processes in Random Porous Bicontinuous Media Aleksandr Shalimov a , Mikhail Tashkinov a, * a Perm National Research Polytechnic University, Komsomoslky Ave. 29, Perm 614990, Russia

* Corresponding author. E-mail address: m.tashkinov@pstu.ru * Correspon ing author. E-mail address: m.tashkinov@pstu.ru

2452-3216 © 2020 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 VCSI1 organizers 2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an ope acces article under C BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the VCSI1 organizers

2452-3216 © 2020 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 VCSI1 organizers 10.1016/j.prostr.2020.04.044