Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/5798
Title: Investigation of spatial variability on strut diameters of additively manufactured lattice structures
Authors: Görgülüarslan, Recep Muhammet
Utku, Güngör O.
Keywords: Additive Manufacturing
Lattice structures
Random field
Uncertainty quantification
Issue Date: 2020
Publisher: American Society of Mechanical Engineers (ASME)
Source: ASME 2020 International Mechanical Engineering Congress and Exposition, IMECE 2020, 16 November 2020 through 19 November 2020, , 167181
Abstract: In this study, the influence of the spatial variability ofgeometric uncertainties on the strut members of the latticestructures fabricated by additive manufacturing is investigated.Individual struts are fabricated with various printing angles anddiameters using a material extrusion process and PLA material.The diameter values of the fabricated samples are measuredalong the printing and radial directions at each layer under anoptical microscope. Spatial correlations are characterized basedon the measurements using the experimental autocorrelationfunction. Candidate autocorrelation functions are fitted to themeasured data to identify the best fitted one for each diameterparameter and the corresponding correlation lengths areevaluated for random field. The applicability of the KarhunenLoève expansion (KLE) is investigated to reduce thedimensionality of the random field discretization. The resultsshow that the diameters of the strut members at each layer arespatially dependent and the KLE method was found to give agood representation of the random field. © 2020 American Society of Mechanical Engineers (ASME). All rights reserved.
URI: https://doi.org/10.1115/IMECE2020-23752
https://hdl.handle.net/20.500.11851/5798
ISBN: 9780791884485
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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