PSI - Issue 32

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 32 (2021) 230–237

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” Abstract Heterogeneous bicontinuous nanoscale structures of the porous gold crystals were investigated in this work. Numerical models of representative volume elements (RVEs) of such nanoporous structures were created. In order to build geometric models, level-set method which splits the geometry into two phases corresponding to the values of the Gaussian random fields was used. Mechanical modeling was performed using finite element analysis implemented in ABAQUS software with user subroutines. The behavior of the matrix phase was investigated with the elastic material model, elastoplastic model and elastoplastic model with damage that includes properties degradation procedure. The effect of volume fraction, internal morphology and loading on the mechanical response of RVEs was investigated. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” Keywords: Open-cell media; bicontinuous structures; representative volume element; finite element method; nanoscale structure; nanoporous gold; numerical models. 1. Introduction Nanoporous metals are a modern and promising class of materials which has recently attracted a great interest of researchers. The structure of these materials can be characterized as a continuous interpenetrating nanoscale network of solid ligaments and pores (Jiao and Huber, 2017). The solid phase can be represented by metals such as silver, platinum, copper, nickel, palladium, titanium, aluminium and gold, while the second phase is porous. The size of the e s ub i V. h s p ce t h - D l s e o o or se y XXIIth Winter School on Continuous Media Mechanics Finite Element Simulation of Elastoplastic Behavior of Nanoporous Metals Using Bicontinuous RVE Models Shalimov A.S. a , Tashkinov M.A. a * a Perm Nation Research Polytechnic University, Komsomolsky Ave. 29, Perm 614990, Russia

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

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics”

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” 10.1016/j.prostr.2021.09.033