Article
Engineering, Mechanical
Miao Zhao, Xinwei Li, David Z. Zhang, Wei Zhai
Summary: Compared to single-phase structures, interpenetrating lattice structures based on triply periodic minimal surfaces exhibit a wide range of adjustable physical and mechanical properties. The influence of volume fraction and interpenetrating parameter on the mechanical properties and deformation behavior of these structures are investigated using representative volume elements and periodic boundary conditions. The results show that the mechanical properties are highly dependent on the interpenetrating parameter, and different deformation mechanisms can be achieved by adjusting this parameter. The experimentally validated 3D-printed samples confirm the effectiveness of the proposed optimization framework, which simultaneously optimizes the distribution of volume fraction and interpenetrating parameter, for lightweight applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Computer Science, Software Engineering
Chenghu Zhang, Tao Wu, Shuzhi Xu, Jikai Liu
Summary: In this paper, a new multiscale topology optimization method is proposed for designing solid-lattice-void hybrid structures. A novel ordered solid-lattice-void interpolation model is developed to smoothly transition between the solid, lattice, and void phases, while considering multiple variables describing the lattice configuration and the relative density variable indicating the solid, lattice, or void status. Numerical examples and experimental validation demonstrate significant structural performance improvement compared with pure lattice-infilled structures.
COMPUTER-AIDED DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Yang Xu, Huachao Mao, Cenyi Liu, Zhengyu Du, Weijia Yan, Zhuoyuan Yang, Jouni Partanen, Yong Chen
Summary: This paper presents a projection-based AM process called hopping light vat photopolymerization (HL-VPP) to address the challenges of fabricating 3D objects with features spanning from microscale to macroscale. HL-VPP achieves large-area, fast-speed, and high-resolution fabrication by synchronizing linear scanning projection with a galvo mirror's rotation. The distinguishing characteristic of HL-VPP is its ability to achieve super-fast curing without motion blur, significantly advancing VPP's use in applications that require macroscale part size with microscale features.
Article
Engineering, Biomedical
Deepak Gupta, Priya Vashisth, Jayesh Bellare
Summary: A complex-shaped gelatin-gellan composite scaffold with multiscale porosity was developed using cryogenic 3D printing and lyophilization, showing enhanced physical and in vitro biological properties compared to scaffolds with only microporosity or macroporosity.
BIOMEDICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fernando Senhora, Emily D. Sanders, Glaucio H. Paulino
Summary: Spinodal architected materials optimize design of multiscale structures by varying spinodal class, orientation, and porosity, leading to efficient material placement along stress trajectories with enhanced mechanical and biological functions.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Juliana dos Santos, Rafaela S. de Oliveira, Thayse de Oliveira, Maiara C. Velho, Martina Konrad, Guilherme S. da Silva, Monique Deon, Ruy C. R. Beck
Summary: The combination of 3D printing and nanotechnology has shown significant progress in the pharmaceutical and medical field, particularly in terms of innovation and multifunctionality of medical products. Various scientific studies have demonstrated the potential of this alliance, with breakthroughs expected in areas such as cell growth, drug delivery, and antimicrobial applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Manufacturing
Jiawei Ren, Shu Jian Chen, Yiping Qiao, Wei Wang
Summary: Structural hierarchy is crucial for manufacturing multiscale particle-based composite materials. A new method utilizing 3D-printed microscaffolds to generate scalable hierarchical structures in concrete has been developed. This method effectively improves the energy absorption capacity of the lightweight composite material by 63.93% compared to traditional lightweight concrete, while reducing the consumption of cementitious material by up to 14% and minimizing scaffold usage. The application of this method has the potential to enhance material performance and efficiency in medical and construction applications involving multiscale particle-based materials such as dental cement and bone implant materials.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Review
Mechanics
Xiao-Yi Zhou, Sheng-Yu Qian, Neng-Wei Wang, Wen Xiong, Wen-Qing Wu
Summary: This study provides a comprehensive review of multiscale uncertainty quantification techniques for fibre reinforced polymer (FRP) composites. It covers the sources of uncertainty, prediction of effective material properties with uncertainties, and probabilistic structural analysis.
COMPOSITE STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Ling Chen, Wenyang Liu, Lijun Song
Summary: This study focuses on characterizing deformation behavior in metallic additive manufacturing parts and attempts to enhance quantitative understanding of the relationships between microstructure and properties in these parts.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Damian Gogolewski
Summary: The article evaluates the impact of data treatment on the possibility of assessing the morphological features of additively manufactured spherical surfaces. Tests were conducted on specimens manufactured using PBF-LB/M additive technology with titanium-powder-based material. Surface topography was assessed using the wavelet transformation method. The research fills a research gap and contributes to the development of modern diagnostic systems for comprehensive surface assessment.
Article
Materials Science, Ceramics
Lorenz Hageluken, Pradeep Vallachira Warriam Sasikumar, Ho-Yun Lee, David Di Stadio, Yashoda Chandorkar, Markus Rottmar, Katharina Maniura-Weber, Gurdial Blugan, Juergen Brugger
Summary: In this study, a fast and pressureless process for fabricating SiCN is presented, which exhibits excellent properties in terms of adjustable electrical conductivity, improved flexural strength, and demonstrated cytocompatibility. Furthermore, this processing route is successfully applied to a new multiscale microshaping method combining two-photon polymerization and casting advantages.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Y. Wang, P. Liu, F. Vogelbacher, M. Li
Summary: This review summarizes the advances in bioinspired multiscale optical structures, including their advantages, fabrication approaches, and applications in optoelectronics. The mechanisms of reducing light losses and enhancing light emission are overviewed. The significance of multiscale structures is highlighted through typical examples from moth-eyes, butterflies, and fireflies. The state-of-the-art progress and promising applications in solar cells, light-emitting diodes, and photodetectors are emphasized.
MATERIALS TODAY NANO
(2022)
Article
Engineering, Mechanical
Lianxiong Chen, Yu Pan, Xihua Chu, Hui Liu, Xinzhong Wang
Summary: This study proposes a multiscale topology optimization method for designing Voronoi graded stochastic lattice structures to address the issue of structural dynamic response. It involves microscale Voronoi structure generation and analysis, followed by macroscale structural optimization, and finally reconstructing the full-scale Voronoi graded stochastic lattice structure. Numerical examples and dynamic experiments validate the correctness and effectiveness of the proposed method.
ACTA MECHANICA SINICA
(2023)
Review
Physics, Multidisciplinary
Charley Presigny, Fabrizio De Vico Fallani
Summary: A comprehensive understanding of the brain requires an integrated description of the multiple scales and levels of neural organization. Multiscale brain modeling is challenging due to the difficulty of accessing information from different scales simultaneously. Recent efforts have focused on developing frameworks from network science and complex systems theory to analyze interconnected systems exhibiting interactions within and between different layers of information.
REVIEWS OF MODERN PHYSICS
(2022)
Article
Neurosciences
Vincent Bazinet, Reinder Vos de Wael, Patric Hagmann, Boris C. Bernhardt, Bratislav Misic
Summary: Signaling in brain networks occurs across multiple topological scales, with different brain regions showing preferences for local or global communication. Unimodal regions prefer local communication, while multimodal regions prefer global communication. These communication preferences result in region- and scale-specific structure-function coupling, contributing to the functional diversity observed in the brain.
Article
Automation & Control Systems
Jing Hong, Lin Zhang, Zhiyu Zhang, Hu Huang, Jiwang Yan
Summary: A comparative study was conducted on mechanical polishing (MP) and laser polishing (LP) as methods for improving the quality of laser-nitrided surfaces. The results showed that LP significantly reduced surface roughness and achieved remarkable improvements in surface quality.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Lin Zhang, Yusuke Sato, Jiwang Yan
Summary: This manuscript proposes a novel adaptive control points sampling strategy to improve form accuracy and retain as many micro surface features as possible. By adjusting the sampling stepovers between control points to adapt to surface profile variation, the proposed method constrains interpolation error within tolerance and eliminates issues of insufficient/excessive control points in the machining area. Compared to the constant sampling method, the form error of the proposed method is reduced by about 35% in both theoretical predictions and experimental measurements with the same number of control points. This technique provides a new route for allocating control points in FTS diamond turning to achieve high form accuracy and machining efficiency in the fabrication of freeform optics.
JOURNAL OF ADVANCED MECHANICAL DESIGN SYSTEMS AND MANUFACTURING
(2023)
Article
Engineering, Industrial
Weihai Huang, Jiwang Yan
Summary: Ultrasonic vibration cutting (UVC) is a promising technology for processing hard-brittle materials in a ductile mode. This study used cyclic nanoindentation to reveal the mechanism of UVC in monocrystalline silicon (Si) and found that cyclic loading promotes silicon amorphization and decreases the threshold for phase transition. Furthermore, the critical cutting depth for brittle-to-ductile transition and the degree of amorphization in cutting chips increase in UVC compared to conventional cutting.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mingming Cui, Hu Huang, Lin Zhang, Jiwang Yan
Summary: In this study, a new nanosecond laser pulling method is proposed to fabricate micro-nano structures on metallic glasses. The formation mechanism and evolution of the micro-nano bulge are investigated, and various micro-nano structures are successfully created on the MG surface, affecting the surface optical diffraction. Overall, this study provides a highly flexible and controllable method for the fabrication of micro-nano structures on MGs.
Article
Materials Science, Coatings & Films
Hongyang Zhang, Yongfeng Qian, Lin Zhang, Minqiang Jiang, Hu Huang, Jiwang Yan
Summary: Laser carbonization of Zr-based metallic glass surface immersed in graphite powder water suspension was attempted to increase surface hardness. The hardness of the laser-irradiated surfaces increased by 130% to 200%, and the micro-scale plastic deformation behavior changed. The increase in surface hardness was attributed to the formation of hard crystalline phases.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Jingtao Wang, Hongyang Zhang, Zhiyu Zhang, Jing Hong, Yongfeng Qian, Hu Huang, Jiwang Yan
Summary: This study attempted to repair the surface defects of Zr-based metallic glass ribbons (MGRs) using nanosecond pulsed laser irradiation. Experimental results showed that the laser-repaired surfaces had significantly reduced roughness compared to melt-spun surfaces, and the surface topographies and morphologies were sensitive to the laser parameters. With optimal parameters, a smooth and defect-free surface could be achieved. This work provides a convenient and efficient approach for repairing surface defects of MGRs.
MANUFACTURING LETTERS
(2023)
Review
Engineering, Manufacturing
Weihai Huang, Jiwang Yan
Summary: Brittle materials are widely used in optics, optoelectronics, and semiconductors. Ultraprecision machining of brittle materials can improve their functional performance and lifespan. This paper provides a comprehensive overview of recent advances in ultraprecision machining of soft-brittle materials, comparing different machining methods and analyzing their effects on tool-workpiece interactions. The paper also identifies challenges in engineering applications and provides solutions and guidelines for future research and development.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2023)
Article
Materials Science, Ceramics
Zhanchen Zhu, Tianfeng Zhou, Yupeng He, Qian Yu, Xibin Wang, Tao Yan, Jiwang Yan, Haihui Ruan
Summary: In this study, a novel two-step precision glass molding (PGM) process is proposed for the fabrication of chalcogenide (ChG) glasses with micro-nano structure arrays. A nickel-phosphorus (Ni-P) mold is used to transfer the antireflective micro-nano structure array to silicate glass, which is then used as a mold to replicate the structured surface onto the ChG glass. The results demonstrate high forming accuracy and favorable infrared optical transmission characteristics of the ChG glass micro-nano structure array, while the silicate glass proves to be a suitable mold material for the ChG glass molding process. This work provides a novel PGM technique for ChG glass materials.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yuka Yamamuro, Tomotaka Shimoyama, Jiwang Yan
Summary: Femtosecond pulsed laser irradiation was used to generate numerous nanopores on the surface of yttria-stabilized zirconia (YSZ) without causing thermal damage to the material. The nanopore generation mechanism involved light focusing and ablation inside the YSZ grains. This study demonstrates the feasibility of selectively fabricating nanopores on YSZ surfaces for various applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Chunlei He, Jiwang Yan, Shuqi Wang, Shuo Zhang, Guang Chen, Chengzu Ren
Summary: A theoretical and deep learning hybrid model is proposed to predict the surface roughness of diamond-turned polycrystalline materials. The model takes into account the kinematic-dynamic roughness component and the material-defect roughness component. The influences of different factors on the surface roughness are discussed, and optimal processing parameters are obtained. A flat surface finish with Sa 1.314 nm is achieved.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2023)
Article
Materials Science, Ceramics
Hong An, Yongfeng Qian, Lin Zhang, Zhiyu Zhang, Hu Huang, Jiwang Yan
Summary: This study improves the surface properties of reaction-bonded silicon carbide (RB-SiC) substrates using nanosecond pulsed laser irradiation. Various micro/nano structures are fabricated, and the ablation mechanism is clarified. Introducing a spider web-like film enhances the wettability and reflectivity of the RB-SiC surface.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Multidisciplinary
Shigeru Tanikawa, Yusuke Sato, Jiwang Yan
Summary: With the advancement of optical technologies such as VR and 3D sensing, there is a growing demand for optical components with complex shapes. Ultra-precision diamond turning is a common method used for freeform optics. However, a time delay caused by the independent control system of the fast tool servo (FTS) can lead to angular misalignment and form errors. In this paper, a novel method for measuring and compensating for the time delay was proposed, resulting in improved form accuracy for freeform optics.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Toshiki Tsuchida, Weihai Huang, Jiwang Yan
Summary: This study investigates the processing characteristics of yttria-stabilized zirconia (YSZ) ceramic under ultrasonic vibration-assisted burnishing (UVB) enhanced by flexible stage and tool rotation techniques. The results show that the use of flexible stage-enhanced UVB reduces the fluctuation of burnishing force and produces a smooth surface with a reduced surface roughness. The use of tool rotation-enhanced UVB forms arc-shaped surface textures and further reduces the surface roughness. Stress-induced phase transformation of YSZ is observed in all burnished surfaces. This study demonstrates the feasibility of manufacturing YSZ with a smooth surface and high residual compressive stress.
PRODUCTION ENGINEERING-RESEARCH AND DEVELOPMENT
(2023)
Article
Engineering, Manufacturing
Mohamed Wagih, Ibrahem Maher, Hassan El-Hofy, Jiwang Yan, Mohsen A. Hassan
Summary: Trochoidal milling is a machining method used to extend cutting tool life. This paper analyzes and experiments the elliptical tool path and proposes a novel linear-elliptical tool path to enhance the performance. The effects on material removal rate, cutting forces, walls waviness, and surface roughness are investigated. The results show improved material removal rate and surface quality, making the linear-elliptical paths promising in increasing the performance of trochoidal milling.
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Industrial
Weihai Huang, Kodai Nagayama, Jiwang Yan
Summary: This study investigates the fabrication of spherical and hexagonal microlens arrays on calcium fluoride (CaF2) using diamond turning. The study demonstrates that microcracks tend to be generated during the cutting process, especially when cutting along specific directions. By reducing the maximum undeformed chip thickness and using a depth-offsetting segment cutting method, high-quality microlens arrays without surface cracking can be achieved. This study proves the feasibility of fabricating high-quality freeform microstructured surfaces on CaF2 and other soft-brittle materials through diamond turning.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
