A voxel-based method of multiscale mechanical property optimization for the design of graded TPMS structures

Jiang, Weimin; Liao, Wenhe; Liu, Tingting; Shi, Xiaohan; Qi, Jian; Chen, Yi; Wang, Zhen; Zhang, Changdong

doi:10.1016/j.matdes.2021.109655

Cited by 32 publications

(4 citation statements)

References 30 publications

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“…Multi-morphology structures made from TPMS have been widely used in biomechanical scaffolds[ 37 , 52 , 53 ]. Their geometries have different functions since the lattice structure change in terms of porosity, cellular topology, and the material itself[ 54 , 55 ]. As described in the previous sections, bone tissue structures vary locally.…”

Section: Methods and Fabricationmentioning

confidence: 99%

Additively Manufactured Multi-Morphology Bone-like Porous Scaffolds: Experiments and Micro-Computed Tomography-Based Finite Element Modeling Approaches

Noroozi¹,

Tatar²,

Zolfagharian³

et al. 2022

IJB

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Tissue engineering, whose aim is to repair or replace damaged tissues by combining the principle of biomaterials and cell transplantation, is one of the most important and interdisciplinary fields of regenerative medicine. Despite remarkable progress, there are still some limitations in the tissue engineering field, among which designing and manufacturing suitable scaffolds. With the advent of additive manufacturing (AM), a breakthrough happened in the production of complex geometries. In this vein, AM has enhanced the field of bioprinting in generating biomimicking organs or artificial tissues possessing the required porous graded structure. In this study, triply periodic minimal surface structures, suitable to manufacture scaffolds mimicking bone’s heterogeneous nature, have been studied experimentally and numerically; the influence of the printing direction and printing material has been investigated. Various multi-morphology scaffolds, including gyroid, diamond, and I-graph and wrapped package graph (I-WP), with different transitional zone, have been three-dimensional (3D) printed and tested under compression. Further, a micro-computed tomography (μCT) analysis has been employed to obtain the real geometry of printed scaffolds. Finite element analyses have been also performed and compared with experimental results. Finally, the scaffolds’ behavior under complex loading has been investigated based on the combination of μCT and finite element modeling.

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Section: Methods and Fabricationmentioning

confidence: 99%

Additively Manufactured Multi-Morphology Bone-like Porous Scaffolds: Experiments and Micro-Computed Tomography-Based Finite Element Modeling Approaches

Noroozi¹,

Tatar²,

Zolfagharian³

et al. 2022

IJB

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“…In tackling the design aspect of the application of active composites, one is confronted with a convoluted inverse problem of finding the optimal material or property distribution to obtain a desired shape change which relies heavily on precise numerical models, such as finite element models, and the exploration strategy, in the form of an optimization algorithm. Approaches that were previously considered incorporate various methods founded upon gradientbased topology optimization (TO) including, but not limited to, level-set topology 31 , graded density optimization 32,33 , linear elastic TO 34 , TO with microstructures 35 , etc. However, the limitations of these methods are apparent when dealing with active materials that are highly non-linear and are subject to large deformations.…”

Section: Introductionmentioning

confidence: 99%

Computational design for 4D printing of topology optimized multi-material active composites

et al. 2023

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Recent efforts on design for four-dimensional (4D) printing have considered the spatial arrangement of smart materials and energy stimuli. The development of multifunctional structures and their desired mechanical/actuation performances require tackling 4D printing from a multi-material design perspective. With the materials distributions there is an opportunity to increase the spectrum of design concepts with computational approaches. The main goal being to achieve the “best” distribution of material properties in a voxelized structure, a computational framework that consists of a finite element analysis-based evolutionary algorithm is presented. It fuses the advantages of optimizing both the materials distribution and material layout within a design space via topology optimization to solve the inverse design problem of finding an optimal design to achieve a target shape change by integrating void voxels. The results demonstrate the efficacy of the proposed method in providing a highly capable tool for the design of 4D-printed active composites.

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“…13,14 In addition, TPMS structures can be designed and optimized as per the requirements by varying the density, unit cell size, curvature, and periodicity. 15,16 Amongst the TPMS lattices, gyroid has been shown to possess exceptional mechanical properties compared to its counterparts as it has no reflectional symmetry nor straight lines leading to reduced stress concentration. 17,18 Additive manufacturing is the chosen approach for fabricating TPMS structures due to their complex topology.…”

Section: Introductionmentioning

confidence: 99%

“…Amongst the different lattice structures, triply periodic minimal surfaces (TPMS)‐based lattices are gaining widespread attention as these structures exhibit higher load capacity and surface to volume ratio compared to strut‐based lattice structures 13,14 . In addition, TPMS structures can be designed and optimized as per the requirements by varying the density, unit cell size, curvature, and periodicity 15,16 . Amongst the TPMS lattices, gyroid has been shown to possess exceptional mechanical properties compared to its counterparts as it has no reflectional symmetry nor straight lines leading to reduced stress concentration 17,18 …”

Section: Introductionmentioning

confidence: 99%

Fiberglass‐reinforced triply periodic minimal surfaces (TPMS) lattice structures for energy absorption applications

Ormiston,

Srinivas Sundarram

2023

Polymer Composites

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Triply periodic minimal surfaces (TPMS)‐based lattice structures exhibit improved mechanical and energy absorption properties compared to other lattices. Fused filament fabrication is the preferred approach for fabricating these structures and majority of the existing TPMS structures are manufactured using a single polymer. This study presents composite lattice structures that are reinforced with a second material. TPMS lattice structures are designed using MSLattice and modeled into cubical, cylindrical, bar, and dogbone geometries with relative density levels of 25%, 50%, and 75%. The structures are 3D printed with micro carbon fiber‐embedded nylon as the base matrix and fiberglass as the reinforcement. The structures are then characterized for mechanical properties and energy absorption as a function of density. The results show that the 25% relative density fiberglass‐reinforced structures exhibited similar or better properties compared to the 75% density structures without reinforcement. The mass normalized maximum force withstood by the 25% density‐reinforced cylinder was 1340 N/g compared to 1219 N/g for the 75% density non‐reinforced cylinder, clearly demonstrating the benefits of adding fiberglass. The 25% density cylindrical samples' energy absorption capacity increased on an average by 24.8% with the addition of fiberglass. The 25% density bar and dogbone samples' exhibited the highest improvement with the addition of fiberglass with an increase in stress capacity of 64.6% and 113%, respectively. These findings suggest that these lightweight composite TPMS structures can be a promising candidate for energy absorption applications such as the crumple zones in automobiles.Highlights Gyroid structure modeled with 25%, 50% and 75% density in different geometries. Structures 3D printed with onyx fiber and reinforced with fiberglass. Reinforced cylindrical samples' energy absorption capacity increased by 24.8%. Bar and dogbone samples' maximum stress capacity doubled with reinforcement. Composite TPMS structures are good candidate for energy absorption application.

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A voxel-based method of multiscale mechanical property optimization for the design of graded TPMS structures

Cited by 32 publications

References 30 publications

Additively Manufactured Multi-Morphology Bone-like Porous Scaffolds: Experiments and Micro-Computed Tomography-Based Finite Element Modeling Approaches

Additively Manufactured Multi-Morphology Bone-like Porous Scaffolds: Experiments and Micro-Computed Tomography-Based Finite Element Modeling Approaches

Computational design for 4D printing of topology optimized multi-material active composites

Fiberglass‐reinforced triply periodic minimal surfaces (TPMS) lattice structures for energy absorption applications

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