An efficient design methodology for graded surface-based lattice structures using free-size optimization and enhanced mapping method

Şimşek, Uğur; Ozdemir, Mirhan; Şendur, Polat

doi:10.1016/j.matdes.2021.110039

Cited by 9 publications

(6 citation statements)

References 50 publications

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“…The authors previously demonstrated that the accuracy of shell models is relatively high for lower relative densities. [25,34] A similar study is performed here to quantify the accuracy of different models for the optimization problem. First, the mechanical properties of lattices are compared using the shell (see Figure 9) and solid (see Figure 4) element-based models.…”

Section: Modeling Of Lattices With Shell Elementsmentioning

confidence: 99%

“…The reader is referred to the authors' previous study for the details of the ERDM algorithm. [34] The optimal thickness distribution of the D-type lattice structure is shown in Figure 21a. The quality of the reconstructed model is assessed considering the thickness variation, and the volume fraction.…”

Section: Reconstruction Of Foglg Models Via Enhanced Rdmmentioning

confidence: 99%

“…This method is employed in a variety of sheet metal constructions to improve the mechanical properties. [30][31][32][33] In the authors' previous study, [34] free-size optimization-based graded lattice generation (FOGLG) is applied successfully for the first time to surface-based DG lattice structure. The performance of the proposed method is compared with HMTO in terms of modal response to demonstrate its effectiveness.…”

mentioning

confidence: 99%

“…This article is an extension of authors' previous studies. [24,25,34] In this study, the design for additive manufacturing (DfAM) technique is used to determine the best material distribution in a design domain using HMTO and FOGLG methodologies for different lattice types. More specifically, HMTO and FOGLG methods are demonstrated and compared for D, G, and I-WP in this study.…”

mentioning

confidence: 99%

“…More specifically, HMTO and FOGLG methods are demonstrated and compared for D, G, and I-WP in this study. The optimized geometries by HMTO and FOGLG are then reconstructed with relative density mapping (RDM) [35] and enhanced relative density mapping (ERDM), [34] respectively. The reconstructed designs of HMTO and FOGLG methods made of cobalt-chromium (CoCr) alloy are manufactured with the direct metal laser melting (DMLM) method, and experimentally validated against modal testing.…”

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confidence: 99%

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Experimental and Numerical Modal Characterization for Additively Manufactured Triply Periodic Minimal Surface Lattice Structures: Comparison between Free‐Size and Homogenization‐Based Optimization Methods

Ozdemir

Şimşek²,

Kuser

et al. 2023

Adv Eng Mater

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Additive manufacturing (AM), a substantial breakthrough over traditional manufacturing processes, has evolved significantly over the last few decades to meet industry demand. [1,2] It enables designers to utilize nature-inspired complex structures such as triply periodic minimal surface (TPMS) lattice structures. [3][4][5] The TPMS structures are desired and topologically ordered in many design applications due to their attractive properties, such as being lightweight and enhanced mechanical properties. [6,7] Another advantage of these structures is that their mechanical performance and functionality can be further improved by altering the thickness of given structures. [8][9][10] The quest for the ideal structure prompts new optimization proposals in the literature. Topology optimization (TO), which defines the best material distribution within the design domain, is one of the most extensively utilized optimization methods in the literature. [11][12][13] Among the various mathematical methods for TO, the solid isotropic material with penalization (SIMP), proposed by Rozvany et al., [14] gained significant attention due to its simplicity in implementation for the TO. The application of this approach to generate multiclass microstructures made of truss elements is available in the literature. For example, surrogate models for different truss-based structures are used in TO to minimize the compliance of the structure for a given volume ratio. The methodology was demonstrated on 2D and 3D case studies. [15] In another study, [16]

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Section: Modeling Of Lattices With Shell Elementsmentioning

confidence: 99%

Section: Reconstruction Of Foglg Models Via Enhanced Rdmmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Experimental and Numerical Modal Characterization for Additively Manufactured Triply Periodic Minimal Surface Lattice Structures: Comparison between Free‐Size and Homogenization‐Based Optimization Methods

Ozdemir

Şimşek²,

Kuser

et al. 2023

Adv Eng Mater

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Lattice structures in stainless steel 17-4PH manufactured via selective laser melting (SLM) process: dimensional accuracy, satellites formation, compressive response and printing parameters optimization

Bertocco

Iannitti

Caraviello

et al. 2022

Int J Adv Manuf Technol

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By the term, lattice structures are intended topologically ordered open-celled structures consisting of one or more repeating unit cells. Technological development and especially the growth of the additive manufacturing (AM) industry allows innovative structural design, including complex lattice structure. Selective laser melting (SLM) is an AM process that enables the manufacture of space filling structures. This work investigated the influence of the most important process parameter settings on lattices printability, focusing on the geometrical accuracy, the quantity of powders adhered to the main frame (satellites) and their compression behaviour. The process parameters such as the laser power, scan speed and layer height affect vigorously the design, quality and mechanical properties of the part. The aim of the paper is to evaluate how different parameter combinations affect the cellular structures’ printing. Twenty-four lattice structures with cubic and rhombic dodecahedron unit cells made of stainless steel 17-4PH (AISI-630) were printed using different combinations of SLM process parameters. Each structure was analysed considering its geometrical, topological and mechanical properties. Finally, the best parameter combination was evaluated comparing results achieved. Although this work investigated the 17-4PH stainless steel, physical principles related to the printing process described are generally true for the SLM process. Therefore, the adopted approach could still be suitable also for all the other materials commonly used with this AM technology.

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Study on multilevel optimization strategy of carbon fiber-reinforced polymer seatback and seat pan

Dai,

Yu,

Long

2024

Int J Mech Mater Des

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An efficient design methodology for graded surface-based lattice structures using free-size optimization and enhanced mapping method

Cited by 9 publications

References 50 publications

Experimental and Numerical Modal Characterization for Additively Manufactured Triply Periodic Minimal Surface Lattice Structures: Comparison between Free‐Size and Homogenization‐Based Optimization Methods

Experimental and Numerical Modal Characterization for Additively Manufactured Triply Periodic Minimal Surface Lattice Structures: Comparison between Free‐Size and Homogenization‐Based Optimization Methods

Lattice structures in stainless steel 17-4PH manufactured via selective laser melting (SLM) process: dimensional accuracy, satellites formation, compressive response and printing parameters optimization

Study on multilevel optimization strategy of carbon fiber-reinforced polymer seatback and seat pan

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