Topology optimization of self-supporting lattice structure

Wang, Weiming; Feng, Dongwei; Li, Yang; Li, Shan; Wang, Charlie C. L.

doi:10.1016/j.addma.2023.103507

Cited by 10 publications

(3 citation statements)

References 54 publications

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“…Naruki Ichihara et al [23] proposed a method to improve the structural toughness of 3D-printed carbon fiber-reinforced composites with localized dotting using the percentage of the intermediate materials obtained in the topology optimization. Wang et al [24] proposed a method to generate self-supporting lattice structures in a topology-optimized framework that can effectively generate self-supporting lattice structures with higher mechanical strength. Liu et al [25] designed a lightweight sandwich aircraft spoiler with a high strength-to-weight ratio and filled the topologically optimized space inside the aircraft spoiler with a 3D kagome lattice by combining topology optimization and lattice structure techniques.…”

Section: Literature Reviewmentioning

confidence: 99%

Topological Design of a Hinger Bracket Based on Additive Manufacturing

Xie

Liu

et al. 2023

Materials

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Topology optimization technology is often used in the design of lightweight structures under the condition that mechanical performance should be guaranteed, but a topology-optimized structure is often complicated and difficult to process using traditional machining technology. In this study, the topology optimization method, with a volume constraint and the minimization of structural flexibility, is applied to the lightweight design of a hinge bracket for civil aircraft. A mechanical performance analysis is conducted using numerical simulations to obtain the stress and deformation of the hinge bracket before and after topology optimization. The numerical simulation results show that the topology-optimized hinge bracket has good mechanical properties, and its weight was reduced by 28% compared with the original design of the model. In addition, the hinge bracket samples before and after topology optimization are prepared with additive manufacturing technology and mechanical performance tests are conducted using a universal mechanical testing machine. The test results show that the topology-optimized hinge bracket can satisfy the mechanical performance requirements of a hinge bracket at a weight loss ratio of 28%.

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Section: Literature Reviewmentioning

confidence: 99%

Topological Design of a Hinger Bracket Based on Additive Manufacturing

Xie

Liu

et al. 2023

Materials

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“…Filling the gap between (mathematical) design and production has boosted research fields in design optimization, applied material science, and production technologies. [17,18] Along this path, the advent of additive manufacturing has played an important role, facilitating the production of complex shape geometries.…”

Section: Introductionmentioning

confidence: 99%

Topologically Optimized Graded Foams

Iaccarino,

Maresca,

Morganti

et al. 2024

Adv Eng Mater

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The adoption of Nature‐inspired strategies to improve materials has fostered the introduction of cavities. But how to mass‐produce structures in which a complex architecture of cavities is point‐to‐point fine‐tuned to the local and global application requirements? To this aim, we herein report the use of a procedure based on topology optimization and gas foaming. As an example case, a polymeric foamed beam whose density map is optimized in 3D for three‐point bending was designed and produced by gas foaming a purpose‐designed preform. The preform was produced with polypropylene and by a high pressure autoclave with as blowing agent. Optical and scanning electron microscopy as well as X‐ray microscopy were used to analyze the 3D optimized foamed structures and showed the effectiveness of the foaming design protocol in producing the FEM‐optimized structures. A remarkable two‐fold increase in the stiffness of the optimized structures was measured with respect to that of the uniformly foamed counterpart with equal overall mass. With the use of a single recyclable material in a single processing step, this method allows one to conceive the mass production of optimized, therefore more sustainable, plastic parts.This article is protected by copyright. All rights reserved.

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“…Therefore, the integration of topology optimization and AM has attracted considerable attention in the research community, as it provides numerous benefits for the design and manufacturing of composite structures. For example, the density-based topology optimization method has been successfully applied to the AM process [24][25][26][27][28]. Some hybrid topology optimization approaches have been proposed to integrate the topological design and the AM process for the lattice structures [29,30].…”

Section: Introductionmentioning

confidence: 99%

Coupling design and fabrication of continuous carbon fiber-reinforced composite structures using two-material topology optimization and additive manufacturing

Ho,

Nguyen,

et al. 2024

Int J Adv Manuf Technol

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This study presents an integration of the level set-based two-material topology optimization method and the additive manufacturing technique for the design and fabrication of continuous carbon fiber (CCF)-reinforced composite structures. Firstly, optimal configurations of the resin material and fiber reinforcement are obtained to maximize the structural stiffness under desired volume constraints using the two-material topological optimization. After that, the level set-based cutting mesh method and triangulation scheme are employed to interpret these 1 ManuscriptClick here to access/download;Manuscript;IJAMT.tex Click here to view linked References topological designs into stereolithography (STL) models with clear structural boundaries for the manufacturing. A customized pre-processing strategy is used to accurately determine the fiber placement regions from the optimal designs. Topological results are then fabricated using the CCF-based 3D printing method with prepreg carbon fibers. Subsequently, the performance of printed CCF-reinforced composite structures is investigated, using different resin materials: Esun polylactic acid (EPLA) and polyamide 12 with 10% carbon fiber (PA12 10CF).Experimental results indicate a significant increase in stiffness and strength of composite structures with fiber reinforcements for all resin materials, with an increase of 315% for EPLA and 234% for PA12 10CF. Additionally, the CCFreinforced composite structures made of PA12 10CF exhibit superior stiffness compared to those made of EPLA with a double increment. The microstructural characteristics of damaged regions are examined using scanning electron microscope (SEM) images, which provide valuable insights into the behavior of resin and fiber materials.

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Topology optimization of self-supporting lattice structure

Cited by 10 publications

References 54 publications

Topological Design of a Hinger Bracket Based on Additive Manufacturing

Topological Design of a Hinger Bracket Based on Additive Manufacturing

Topologically Optimized Graded Foams

Coupling design and fabrication of continuous carbon fiber-reinforced composite structures using two-material topology optimization and additive manufacturing

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