Author
Özdemir, Mirhan, Simsek, U., Kuşer, Engin, Gayir, C. E., Celik, A., Şendur, Polat
Publication Date
2023-06
Publication Place
-
Wiley
Subject
Free-size optimization, Functionally graded lattices, Homogenization, Topology optimization, Triply periodic minimal surface (TPMS)
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1438-1656
Record ID
2ffc8b0b-ba4f-43b9-b72e-8f6355a80126
Library Location
Mechanical Engineering
Date
2023-06
Notes
TÜBİTAK
Sample Text
Homogenization-based topology optimization (HMTO) is one of the most extensively used grading methods to generate functionally graded lattice structures (FGLs). However, it requires a precharacterization of the lattices, which is time-consuming. As a remedy, free-size optimization-based graded lattice generation (FOGLG) is explored as an alternative method to generate the FGLs. This article builds on the authors’ previous work in which the HMTO and FOGLG approaches are studied to improve the dynamic characteristic of a design by using a single lattice type, namely, double gyroid (DG) structure. To show applicability of the proposed methods, different lattice types including diamond (D), gyroid (G), and I-WP are employed to create FGLs herein. The frequency response analysis is performed, and the results from HMTO and FOGLG are compared in terms of their accuracy and efficiency. The optimized designs are then reconstructed by relative density mapping (RDM) and enhanced relative density mapping (ERDM) methods. The fabricated test samples made of cobalt–chromium using the direct metal laser melting (DMLM) technique are then experimentally validated using a laser vibrometer. The results reveal that HMTO and FOGLG can be used on the lattice types with a variety of configurations and relative densities.
DOI
10.1002/adem.202201811
Cilt
25
