Soyarslan, Celal

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Citation - WoS: 7
Citation - Scopus: 8
Elastostatics of star-polygon tile-based architectured planar lattices
(Elsevier Sci Ltd, 2023) Soyarslan, Celal; Gleadall, Andrew; Yan, Jiongyi; Argeso, Hakan; Sozumert, Emrah
A panoptic view of architectured planar lattices based on star-polygon tilings was developed. Four starpolygon-based lattice sub-families, formed of systematically arranged triangles, squares, or hexagons, were investigated numerically and experimentally. Finite-element-based homogenization allowed computation of Poisson's ratio, elastic modulus, shear modulus, and planar bulk modulus. A comprehensive understanding of the range of properties and micromechanical deformation mechanisms was developed. Adjusting the star-polygon angle achieved an over 250-fold range in elastic modulus, over a 10-fold range in density, and a range of -0.919 to +0.988 for Poisson's ratio. Additively manufactured lattices, achieved by novel printing strategies, showed good agreement in properties. Parametric additive manufacturing procedures for all lattices are available on www.fullcontrol.xyz/#/models/1d3528. Three of the four sub-families exhibited in-plane elastic isotropy. One showed high stiffness with auxeticity at low density and a primarily axial deformation mode as opposed to bending deformation for the other three lattices. The range of achievable properties, demonstrated with property maps, proves the extension of the conventional material-property space. Lattice metamaterials with Triangle-Triangle, Kagome, Hexagonal, Square, Truncated Archimedean, Triangular, and Truncated Hexagonal topologies have been studied in the literature individually. Here, it is shown that these structures belong to the presented overarching lattice family. (c) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Citation - WoS: 12
Skeletonization-based beam finite element models for stochastic bicontinuous materials: Application to simulations of nanoporous gold
(Cambridge Univ Press, 2018) Soyarslan, Celal; Argeso, Hakan; Borgmann, Swantje
An efficient representative volume element generation strategy is developed in modeling nanoporous materials. It uses periodic 3D beam finite element (FE) models derived from skeletonization of spinodal-like stochastic microstructures produced by a leveled random field. To mimic stiffening with agglomeration of the mass at junctions, an increased Young's modulus is assigned to the elements within the junction zone. The effective Young's modulus, Poisson's ratio, and universal anisotropy index are computed. A good agreement of the Young's modulus predictions with those obtained from experimental results for phase volume fractions 0.20 < phi(B) < 0.50 is observed. Moreover, the elastic anisotropy index of the generated beam networks shows sufficient proximity to isotropy. Finally, it is demonstrated that, as compared to the simulation statistics of voxel-FE models, for the beam-FE models over 500-fold computational acceleration with 250-fold less memory requirement is provided.

Journal	Count
9th International Conference on Technology of Plasticity, ICTP 2008 -- 9th International Conference on Technology of Plasticity, ICTP 2008 -- 7 September 2008 through 11 September 2008 -- Gyeongju -- 104766	1
Computer Methods in Biomechanics and Biomedical Engineering	1
Finite Elements in Analysis and Design	1
Journal of Materials Research	1
Makina Tasarım ve Imalat Dergisi	1

Soyarslan, Celal

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