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triply periodic minimal surface(TPMS)porous structures:from multi-scale design,precise additive manufacturing to multidisciplinary applications

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International Journal of Extreme Manufacturing 2022年第2期4卷 1-31页

作者： Jiawei Feng Jianzhong Fu Xinhua Yao Yong He State Key Laboratory of Fluid Power and Mechatronic Systems College of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Inspired by natural porous architectures,numerous attempts have been made to generate porous *** to the smooth surfaces,highly interconnected porous architectures,and mathematical controllable geometry features,triply periodic minimal surface(TPMS)is emerging as an outstanding solution to constructing porous structures in recent ***,many advantages of TPMS are not fully utilized in current *** problems of the process from design,manufacturing to applications need further systematic and integrated *** this work,a comprehensive overview of TPMS porous structures is *** order to generate the digital models of TPMS,the geometry design algorithms and performance control strategies are introduced according to diverse *** on that,precise additive manufacturing methods are summarized for fabricating physical TPMS ***,actual multidisciplinary applications are presented to clarify the advantages and further potential of TPMS porous ***,the existing problems and further research outlooks are discussed.

关键词： triply periodic minimal surface porous structures shape and performance control additive manufacturing multidisciplinary applications

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Bioceramic scaffolds with triply periodic minimal surface architectures guide early-stage bone regeneration

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Bioactive Materials 2023年第7期25卷 374-386页

作者： Miaoda Shen Yifan Li Fengling Lu Yahui Gou Cheng Zhong Shukun He Chenchen Zhao Guojing Yang Lei Zhang Xianyan Yang Zhongru Gou Sanzhong Xu Department of Orthopedics The First Affiliated HospitalZhejiang University School of MedicineHangzhou310003China Bio-nanomaterials and Regenerative Medicine Research Division Zhejiang-California International Nanosystem InstituteZhejiang UniversityHangzhou310058China Zhejiang University-University of Edinburgh Institute Zhejiang UniversityHaining314499China Department of Orthopaedics The Third Hospital Affiliated to Wenzhou Medical University&Rui’an People’s HospitalRui’an325200China Department of Orthopaedics The First Affiliated Hospital of Wenzhou Medical UniversityWenzhou325000China

The pore architecture of porous scaffolds is a critical factor in osteogenesis,but it is a challenge to precisely configure strut-based scaffolds because of the inevitable filament corner and pore geometry *** study provides a pore architecture tailoring strategy in which a series of Mg-doped wollastonite scaffolds with fully interconnected pore networks and curved pore architectures called triply periodic minimal surfaces(TPMS),which are similar to cancellous bone,are fabricated by a digital light processing *** sheet-TPMS pore geometries(s-Diamond,s-Gyroid)contribute to a 3‒4-fold higher initial compressive strength and 20%-40%faster Mg-ion-release rate compared to the other-TPMS scaffolds,including Diamond,Gyroid,and the Schoen’s I-graph-Wrapped Package(IWP)in ***,we found that Gyroid and Diamond pore scaffolds can significantly induce osteogenic differentiation of bone marrow mesenchymal stem cells(BMSCs).Analyses of rabbit experiments in vivo show that the regeneration of bone tissue in the sheet-TPMS pore geometry is delayed;on the other hand,Diamond and Gyroid pore scaffolds show notable neo-bone tissue in the center pore regions during the early stages(3-5 weeks)and the bone tissue uniformly fills the whole porous network after 7 ***,the design methods in this study provide an important perspective for optimizing the pore architecture design of bioceramic scaffolds to accelerate the rate of osteogenesis and promote the clinical translation of bioceramic scaffolds in the repair of bone defects.

关键词： Pore geometry Bone regeneration efficiency triply periodic minimal surface Biodegradable bioceramics Tissue engineering

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Enhanced energy-absorbing and sound-absorbing capability of functionally graded and helicoidal lattice structures with triply periodic minimal surfaces

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International Journal of Minerals,Metallurgy and Materials 2023年第10期30卷 1973-1985页

作者： Miao Zhao Zhendong Li Jun Wei Chua Chong Heng Lim Xinwei Li Department of Mechanical Engineering National University of SingaporeSingapore 117411Singapore Chongqing Key Laboratory of Metal Additive Manufacturing(3D Printing) Chongqing UniversityChongqing 400044China Department of Mechanical Engineering Newcastle UniversitySingapore 567739Singapore

Lattice structures have drawn much attention in engineering applications due to their lightweight and multi-functional *** this work,a mathematical design approach for functionally graded(FG)and helicoidal lattice structures with triply periodic minimal surfaces is *** types of lattice structures including uniform,helicoidal,FG,and combined FG and helicoidal are fabricated by the additive manufacturing *** deformation behaviors,mechanical properties,energy absorption,and acoustic properties of lattice samples are thoroughly *** load-bearing capability of helicoidal lattice samples is gradually improved in the plateau stage,leading to the plateau stress and total energy absorption improved by over 26.9%and 21.2%compared to the uniform sample,*** phenomenon was attributed to the helicoidal design reduces the gap in unit cells and enhances fracture *** acoustic properties,the design of helicoidal reduces the resonance frequency and improves the peak of absorption coefficient,while the FG design mainly influences the peak of absorption *** broad range of frequency from 1000 to 6300 Hz,the maximum value of absorption coefficient is improved by18.6%-30%,and the number of points higher than 0.6 increased by 55.2%-61.7%by combining the FG and helicoidal *** study provides a novel strategy to simultaneously improve energy absorption and sound absorption properties by controlling the internal architecture of lattice structures.

关键词： additive manufacturing lattice structure triply periodic minimal surface energy absorption sound absorption

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Isogeometric Analysis-Based Topological Optimization for Heterogeneous Parametric Porous Structures

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Journal of Systems Science & Complexity 2023年第1期36卷 29-52页

作者： HU Chuanfeng HU Hui LIN Hongwei YAN Jiacong School of Mathematical Sciences State Key Lab.of CAD&CGZhejiang UniversityHangzhou 310027China

Porous structures widely exist in nature and artifacts,which can be exploited to reduce structural weight and material usage or improve damage tolerance and energy *** this study,the authors develop an approach to design optimized porous structures with triply periodic minimal surfaces(TPMSs)in the framework of isogeometric analysis(IGA)-based topological *** the developed method,by controlling the density distribution,the designed porous structures can achieve the optimal mechanical performance without increasing the usage of ***,the implicit functions of the TPMSs are adopted to design several types of porous elements ***,to reduce the cost of computation,the authors propose an equivalent method to forecast the elastic modulus of these porous elements with different ***,the relationships of different porous elements between the elastic modulus and the relative density are ***,the IGA-based porous topological optimization is developed to obtain an optimal density distribution,which solves a volume constrained compliance minimization problem based on ***,an optimum heterogeneous porous structure is generated based on the optimized density *** results demonstrate the effectiveness and efficiency of the proposed method.

关键词： B-spline solid heterogeneous porous structure isogeometric analysis topological optimization triply periodic minimal surface

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Laser Powder Bed Fusion-built Ti6Al4V Bone Scaffolds Composed of Sheet and Strut-based Porous Structures: Morphology, Mechanical Properties, and Biocompatibility

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Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers) 2022年第4期1卷 87-99页

作者： Shuai Ma Qian Tang Changbao Zhu Fuyou Wang Qixiang Feng Jun Song Rossitza Setchi Chenglong Ma Ran Tao State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing400044China College of Mechanical Engineering Chongqing University of TechnologyChongqing400054China Cardiff School of Engineering Cardiff UniversityCardiffCF243A1United Kingdom Department of Orthopedics General Hospital of Xinjiang Military RegionUrumqi830099China Center for Joint Surgery Southwest HospitalThe Third Military Medical UniversityChongqing400038China School of Mechanical Engineering Jiangnan UniversityWuxi214122China School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen518055China

Laser powder bed fusion(L-PBF)-built triply periodic minimal surface(TPMS)structures are designed by implicit functions and are endowed with superior characteristics,such as adjustable mechanical properties and light-weight features for bone repairing;thus,they are considered as potential candidates for bone ***,previous studies have mainly focused on different TPMS *** fundamental understanding of the differences between strut and sheet-based structures remains exclusive,where both were designed by one *** consequently hinders their practical ***,we compared the morphology,mechanical properties,and biocompatibility of sheet and strut-based *** particular,the different properties and in vivo bone repair effects of the two structures are ***,the morphology characteristics demonstrate that the manufacturing errors of sheet-based structures with diverse porosities are comparable,and semi-melting powders as well as the ball phenomenon are observed;in comparison,strut-based samples exhibit cracks and thickness ***,the mechanical properties indicate that the sheet-based structures have a greater elastic modulus,energy absorption,and better repeatability compared to strut-based ***,layer-by-layer fracturing and diagonal shear failure modes are observed in strut-based and sheet-based structures,*** in vivo experiment demonstrates enhanced bone tissues in the strut-based *** study significantly enriches our understanding of TPMS structures and provides significant insights in the design of bone scaffolds under various bone damaging conditions.

关键词： triply periodic minimal surface Bone repair Tissue engineering Mechanical properties Laser powder bed fusion

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Fabrication of Ceramic-Polymer Piezo-Composites with triply periodic minimal Interfaces via Digital Light Processing

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Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers) 2023年第4期2卷 3-12页

作者： Kai Liu Junchao He Tianyang Li Jiaming Hu Yanying Du Yusheng Shi Chunzhe Yan Zhangwei Chen Shangyu Huang Huajun Sun State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China School of Logistics Engineering Wuhan University of TechnologyWuhan430070China State Key Laboratory of Materials Processing and Die and Mould Technology Huazhong University of Science and TechnologyWuhan430074China Additive Manufacturing Institute Shenzhen UniversityShenzhen518060China

The geometry of the phase interface in co-continuous piezoelectric composites is critical in improving their piezo-electric ***,conventional co-continuous piezoelectric composites are mostly simple structures such as wood stacks or honeycombs,which are prone to stress concentrations at the joints,thus reducing the fatigue service performance and force-electric conversion efficiency of piezoelectric *** simple structures limit further improvements in the overall performance of co-continuous piezoelectric *** this study,based on the digital light processing 3D printing method,we investigated the influence of three dif-ferent structures-the gyroid,diamond,and woodpile interfaces-on the piezoelectric and mechanical properties of co-continuous ceramic/polymer piezoelectric *** findings demonstrate that the gyroid and di-amond interfaces outperformed the ceramic skeleton of the woodpile interface in terms of both mechanical and electrical *** the ceramic volume percentage was 50%,the piezo-composite of the gyroid surface exhibited the greatest hydrostatic figure of merit(HFOM),reaching 4.23×10^(−12) Pa^(−1),and its piezoelectric coeffi-cient(d_(33))and relative dielectric constant(εr)reached 115 pC/N and 748,*** research results lay the foundation for the application of co-continuous piezoelectric composites in underwater communication and detection.

关键词： Additive manufacturing Digital light processing BaTiO_(3) triply periodic minimal surface Piezoelectric composite

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