PSI - Issue 32

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 32 (2021) 253–260

© 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 Additive technologies offer promising opportunities for creating structures with optimal properties tailored to the requirements of each particular application. The present paper is focused on functionally graded lattice structures, which are designed based on the triply periodic minimal surfaces (TPMS) of the Gyroid and I-WP types. The aim of the work was to create three-dimensional models and to study mechanical behavior of the polymer lattice structures that can be obtained by the fused filament fabrication (FFF) 3D printing method. The geometrical models of heterogeneous lattice structures were obtained using the level-set approach and equations for the periodic surfaces. The results of modeling of the mechanical behavior of lattice structures under uniaxial tension were obtained using the finite element analysis. Influence of structural parameters and gradient properties on the distribution of stress fields was studied by comparing loading curves obtained for the structures in the course of the numerical simulations. © 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: Triply Periodic Minimal Surfaces, bicontinuous structure, representative volume element, finite element method, 3D microstructure; 1. Introduction The active development of the additive manufacturing technologies (3D printing) opens up new possibilities in the creation of new artificial materials with optimal properties. One of the concepts of creating functional materials using this manufacturing method is the design of structurally heterogeneous materials with a gradient of properties. XXIIth Winter School on Continuous Media Mechanics Modeling of Deformation Behavior of Gyroid and I-WP Polymer Lattice Structures with a Porosity Gradient Nataliya Elenskaya a , Mikhail Tashkinov a* a Perm National Research Polytechnic University, Komsomoslky Ave. 29, Perm 614990, Russia Abstract Additive technologies offer promising opportunities for creating structures with optimal properties tailored to the requirements of each particular application. The present aper is focused on func ionally graded lattice structur , which are d signed based n the tri ly periodic minimal surfaces (TPMS) of the Gyroid and I-WP types. Th aim of the work was to create three-dimensional models and to study mechanical behavior of the polymer lattice struc ur that c n be obtained by the fus d filam nt fabrication (FFF) 3D printing method. The geometrical models of h terogeneo s lattice stru tures were obtained using the evel-set approach and equations for th periodic surfac s. The resu ts of modeli g f the m chanical behavior of lattice structur s under uniaxial tension were obtain d using the finite el m nt analysis. Influence of structur l par meters and gradien properties on the distribution of stress fields was studied by compari g loading curves btained for the structures in the course of the numerical s mulations. © 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 e scientific committe of the XXIIth Winter School on Continuous Media Mechanics” K ywords: Triply Periodic Minimal Surfaces, bicontinuous structure, representative volume element, finite element metho , 3D microstructure; 1. Introduction The active development of the additive manufacturing technologies (3D printing) opens up new possibilities in the cr ation of new artificial mat rials with optim l p oper ies. One of the concepts of cr ating functional ma erials using this manufactu ing method is the design of structurally heterogeneous materials with a radient of propert es. XXIIth Winter School on Continuous Media Mechanics Modeling of Deformation Behavior of Gyroid and I-WP Polymer Lattice Structures with a Porosity Gradient Nataliya Elenskaya 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 * Corresponding author. E-mail ad ress: 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 u der responsibility of t scientific committe 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.2021.09.036