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Effect of Structural Configu ations on mechanical and Shape Recovery Properties of Ni Ti Triply Periodic Minimal Surface Porous Structures

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Chinese Journal of mechanical engineering 2024年第6期37卷 303-319页

作者： Shuaishuai Wei Bo Song Lei Zhang Xiaobo Wang Junxiang Fan Zhi Zhang Yusheng Shi State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Institute of Materials China Academy of Engineering PhysicsMianyang 621907China Department of Mechanical Engineering City University of Hong KongKowloon 999077China

Based on the advantages of triply periodic minimal surface(TPMS)porous structures,extensive research on NiTi shape memory alloy TPMS scaffolds has been ***,the current reports about TPMS porous structures highly rely on the implicit equation,which limited the design *** this work,novel shell-based TPMS structures were designed and fabricated by laser powder bed *** comparisons of manufacturability,mechanical properties,and shape recovery responses between traditional solid-based and novel shell-based TPMS structures were *** indicated that the shell-based TPMS porous structures possessed larger Young's moduli and higher compressive ***,Diamond shell structure possessed the highest Young's moduli of 605.8±24.5MPa,while Gyroid shell structure possessed the highest compressive strength of 43.90±3.32 *** addition,because of the larger specific surface area,higher critical stress to induce martensite transformation,and lower austenite finish temperature,the Diamond shell porous structure exhibited much higher shape recovery performance(only 0.1%residual strain left at pre-strains of 6%)than other porous *** results substantially uncover the effects of structural topology on the mechanical properties and shape recovery responses of NiTi shape memory alloy scaffolds,and confirm the effectiveness of this novel structural design *** research can provide guidance for the structural design application of NiTi porous scaffolds in bone implants.

关键词： NiTi shape memory alloy Porous structure Laser powder bed fusion mechanical property Shape recovery property

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Review of Recent Advancements in 3D Printing Technologies for Textile Applications

Textile and Leather Review

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Textile and Leather Review 2025年 8卷 72-104页

作者： Lemi, Muleta Tiki Lemu, Hirpa Gelgele Gutema, Endalkachew Mosisa Department of Mechanical and Structural Engineering and Materials Science Faculty of Science and Technology University of Stavanger StavangerN-4036 Norway Department of Mechanical Engineering College of Engineering &Technology Wollega University P.O. Box 395 Nekemte Ethiopia

3D printing (3DP) ranks as one of the more advanced methods in the manufacturing sector. All of the industrial sectors, including automobiles, medical services, aviation, athletics, fabrics, apparel, and fashion industries, have noticed an increase in the use of this approach for prototyping. In the past decade, 3DP technology has been applied in several industries by academics, textile technologists, designers of apparel, manufacturers, and suppliers. Textiles perform numerous purposes in addition to meeting the basic human need to protect the body. The textile industry has expanded its horizons with the incorporation of 3DP technology. This paper's goal is to present an integrated overview of the recent state of research to identify the most advanced 3DP techniques, materials, and applications currently used in the clothing and textile sectors. Fundamentals of basic textile substrates, numerous textile-related 3DP technologies, printing methods, materials for print inks, direct printing of 3D elements on different textile surfaces, and the impacts, benefits and limitations of 3D printed textile structure fabrication techniques are all addressed. It also emphasizes the ways 3DP technology will be used in the textile sector moving forward. Overall, the purpose of this issue of Textile Progress is to identify the potential of 3DP, which, despite certain limits, may improve the products of the fashion and textile sectors and encourage future scientists and designers to continue additional research. © 2025, idd3. All rights reserved.

关键词： Textile industry

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Spatially-graded 3D-printed viscoelastic truss metamaterials for impact trajectory control and energy absorption

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Theoretical & Applied Mechanics Letters 2024年第5期14卷 378-385页

作者： Kaoutar Radi Raphaël N.Glaesener Siddhant Kumar Dennis M.Kochmann Mechanics&Materials Lab Department of Mechanical and Process EngineeringETH Zürich 8092Switzerland Mechanics&Materials Computing Lab Department of Materials Science&EngineeringTU Delft 2628 CNNetherlands

This study demonstrates that two-and three-dimensional spatially graded,truss-based polymeric-material metamaterials can be designed for beneficial impact mitigation and energy absorption *** a combination of numerical and experimental techniques,we highlight the broad property space of periodic viscoelastic trusses,realized using 3D printing via selective laser *** beyond periodic designs,we investigate the impact response of spatially variant viscoelastic lattices in both two and three *** result reveal that introducing spatial variations in lattice topology allows for redirecting of the impact trajectory,opening new opportunities for engineering and tailoring lightweight materials with target impact *** is achieved through the combined selection of base material and metamaterial design.

关键词： Metamaterial 3D Printing Viscoelasticity Impact Truss Finite element method

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Effect of grain size on iron-boride nanoglasses

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Journal of materials science & Technology 2023年第10期141卷 116-123页

作者： Melody M.Wang Mehrdad T.Kiani Abhinav Parakh Yue Jiang X.Wendy Gu Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA Department of Mechanical Engineering Stanford UniversityStanfordCA 94305USA

Metallic nanoglasses are made of amorphous grains that are separated by lower-density amorphous boundaries,which have been proposed to enhance plasticity through the deflection of cracks and shear bands at *** has been difficult to experimentally control grain size and interfacial structure to understand their roles in plastic ***,we fabricate bulk nanoglasses via compaction and sintering of colloidally synthesized amorphous iron-boride *** nanoglasses have amor-phous grains with diameters from 116 nm to 576 nm and were tested using nanoindentation and mi-cropillar *** nanoglass with a grain size of 576 nm shows the highest elastic modulus and hardness of 101 GPa and 7.4 GPa,*** electron microscopy reveals that nanocrys-tals form within the nanoglasses during *** nanocrystal density correlates with higher nanoparticle crystallization enthalpy,an increase in plasticity,and a decrease in yield *** strain of 5.0%,yield strength of 3.8 GPa,and ultimate compressive strength of 2.7-3.8 GPa were *** show that the compaction of colloidal metallic glass nanoparticles results in robust bulk samples,with mechanical properties similar to that of other iron-based bulk metallic glasses.

关键词： Colloidal Nanoparticles Interface Nanoindentation Micropillar Plasticity

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Design and Analysis of Energy Absorbent Bioinspired Lattice Structures

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Journal of Bionic engineering 2023年第4期20卷 1670-1686页

作者： Lucrezia Greco Federica Buccino Zhuo Xu Laura Vergani Filippo Berto Mario Guagliano Seyyed Moahmmad Javad Razavi Sara Bagherifard Department of Mechanical Engineering Politecnico di MilanoMilanItaly Department of Mechanical and Industrial Engineering Norwegian University of Science and TechnologyTrondheimNorway Chemical Engineering and Materials Environment Department Sapienza University of RomeRomeItaly

The increasing demand for energy absorbent structures,paired with the need for more efficient use of materials in a wide range of engineering fields,has led to an extensive range of designs in the porous forms of sandwiches,honeycomb,and *** achieve an even better performance,an ingenious solution is to learn how biological structures adjust their configurations to absorb energy without catastrophic *** this study,we have attempted to blend the shape freedom,offered by additive manufacturing techniques,with the biomimetic approach,to propose new lattice structures for energy absorbent *** this aim we have combined multiple bio-inspirational sources for the design of optimized configurations under compressive *** lattice structures are fabricated based on the designed unit cell geometries and studied using experimental and computational *** individual effect of each bio-inspired feature has been evaluated on the energy absorbance performance of the designed *** on the design parameters of the lattices,a tuning between the strength and energy absorption could be obtained,paving the way for transition within a wide range of real-life applicative scenarios.

关键词： Energy absorbance Lattice structures Bio-inspiration Fused deposition modeling Lightweight design

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Enhancing adhesive bond strength of CFRP/titanium joints through NaOH anodising and resin pre-coating treatments with optimised anodising conditions

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Chinese Journal of Aeronautics 2024年第2期37卷 511-523页

作者： Yunsen HU Jingheng ZHANG Lin WANG Fei CHENG Xiaozhi HU School of Materials and Chemistry Southwest University of Science and TechnologyMianyang 621000China School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Engineering Research Center of Biomass Materials Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China Department of Mechanical Engineering University of Western AustraliaPerthWA 6009Australia

Adhesively Bonded Carbon Fibre Reinforced Plastic(CFRP)and titanium alloy have been extensively used as a hybrid structure in modern aircrafts due to their excellent combination of mechanical properties and chemical *** study utilised NaOH anodising method to create micro-rough titanium surfaces for enhancing adhesive bonding between titanium alloy and CFRP laminates.A special and simple technique named Resin Pre-Coating(RPC)was also employed to improve the surface wetting of anodised titanium and grinded CFRP *** influences of anodising temperature and duration on the surface morphology,wettability and adhesive bond strength were *** single lap shear test results showed that the bond strength of specimens anodised at 20℃for 15 min improved by 135.9%and 95.4%,respectively,in comparison with that of acid pickled and grinded specimens(without RPC treatment).Although increasing the anodising temperature and duration produced rougher titanium surfaces,the adhesively bonded joints were not strong enough due to relatively friable titanium oxide layers.

关键词： Carbon Fibre Reinforced Polymer(CFRP) Titanium alloy Anodising Resin pre-coating Adhesive joints

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Fibrillar adhesives with unprecedented adhesion strength,switchability and scalability

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National science Review 2024年第10期11卷 20-33页

作者： Changhong Linghu Yangchengyi Liu Xudong Yang Dong Li Yee Yuan Tan Mohamed Haziq Bin Mohamed Hafiz Mohammad Fadhli Bin Rohani Zihao Du Jiangtao Su Yan Li Yucheng Huo Hanyan Xu Xiufeng Wang Yifan Wang Jing Yu Huajian Gao K.Jimmy Hsia School of Mechanical and Aerospace Engineering Nanyang Technological University School of Materials Science and Engineering Xiangtan University Department of Engineering Mechanics Zhejiang University School of Materials Science and Engineering Nanyang Technological University Institute of High-Performance Computing A*STAR Mechano-X Institute Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological University

Bio-inspired fibrillar adhesives have received worldwide attention but their potentials have been limited by a trade-off between adhesion strength and adhesion switchability, and a size scale effect that restricts the fibrils to micro/nanoscales. Here, we report a class of adhesive fibrils that achieve unprecedented adhesion strength（～2 MPa）, switchability（～2000）, and scalability（up to millimeter-scale at the single fibril level）,by leveraging the rubber-to-glass（R2G） transition in shape memory polymers（SMPs）. Moreover, R2G SMP fibrillar adhesive arrays exhibit a switchability of >1000（with the aid of controlled buckling） and an adhesion efficiency of 57.8%, with apparent contact area scalable to 1000 mm2, outperforming existing fibrillar adhesives. We further demonstrate that the SMP fibrillar adhesives can be used as soft grippers and reusable superglue devices that are capable of holding and releasing heavy objects >2000 times of their own weight. These findings represent significant advances in smart fibrillar adhesives for numerous applications,especially those involving high-payload scenarios.

关键词： JKR-DMT transition rubber-to-glass (R2G) transition R2G fibrillar adhesives shape memory polymers adhesion switchability and scalability

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Solid dust induced roughening and overheating of TBC-coated superalloy

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Journal of materials science & Technology 2024年第13期180卷 69-79页

作者： Jia-Qi Han Mei-Jun Liu Javad Mostaghimi Guan-Jun Yang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China Department of Mechanical and Industrial Engineering University of TorontoTorontoON M5S 3G8Canada

Thermal barrier coatings(TBC)on superalloy blade/vane enable an increase in turbine inlet temperature(TIT)and aero-engine ***,the deposition of dust on TBC significantly ablates superalloys and becomes a bottleneck for advanced engine *** paper presents a comprehensive mod-eling approach,based on an experiment involving dust deposition on a TBC-coated substrate,aimed at understanding the fundamental cause of substrate *** results show that a significant increase in surface roughness is obtained experimentally with dust *** temperature field within the TBC-substrate system is disturbed by surface ***,the film cooling is seriously *** the dust accumulated on the TBC surface also contributes to heat insulation by increas-ing the effective TBC thickness,localized overheating of the substrate occurs and then leads to ablation and premature failure of the *** elucidation of the overheating mechanism could inform the development of strategies to resist dust accumulation in advanced aero engines.

关键词： Thermal barrier coating Superalloy Dust Roughness Overheating

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Synthesis of N-doped carbon quantumn dots as lubricant additive to enhance the tribological behavioor f MoS_(2)nanofluid

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Friction 2023年第3期11卷 441-459页

作者： Jiaqi HE Jianlin SUN Junho CHOI Chenglong WANG Daoxin SU School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering The University of TokyoTokyo 113-8656Japan

In this study,a novel lubricant additive nitrogen-doped carbon quantum dot(N-CQD)nanoparticle was prepared by the solvothermal *** synthesized spherical N-CQD nanoparticles in the diameter of about 10 nm had a graphene oxide(GO)-like structure with various oxygen(O)-and nitrogen(N)-containing functional *** N-CQDs were added to MoS_(2)nanofluid,and the tribological properties for steel/steel friction pairs were evaluated using a pin-on-disk ***-equilibrium molecular dynamics(NEMD)simulations for the friction system with MoS_(2)or MoS_(2)+N-CQD nanoparticles were also *** results showed that friction processes with MoS_(2)+N-CQD nanofluids were under the mixed lubrication *** MoS_(2)nanofluid containing 0.4 wt%N-CQDs could achieve 30.4%and 31.0%reduction in the friction coefficient and wear rate,respectively,compared to those without *** analyzing the worn surface topography and chemical compositions,the excellent lubrication performance resulted from the formation of tribochemistry-induced *** average thickness of tribofilm was about 13.9 nm,and it was composed of amorphous substances,ultrafine crystalline nanoparticles,and self-lubricating FeSO_(4)/Fe2(SO_(4))_(3).NEMD simulation results indicated the interaction between S atoms in MoS_(2)as well as these O-and N-containing functional groups in N-CQDs with steel surfaces enhanced the stability and strength of *** the metal surface was further protected from friction and wear.

关键词： carbon-based quantum dots(CQDs) lubricant nanofluid molecular dynamics(MD) tribofilm

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Insight Into Pre-Intercalation of Layered Vanadium Oxide Cathodes: From Precise Control of the Interspace to Related Electrochemical Performance and Beyond

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Carbon Energy 2025年第4期7卷 95-113页

作者： Zhangxiang Hao Jian Wang Junrun Feng Yameng Fan Jian Peng Jiazhao Wang Shixue Dou School of Science School of Chip Industry Hubei University of Technology Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong North Wollongong Department of Mechanical and Materials Engineering Western University Institute of Energy Materials Science University of Shanghai for Science and Technology

Pre-intercalation is the mainstream approach to inhibit the unpredicted structural degradation and the sluggish kinetics of Zn-ions migrating in vanadium oxide cathode of aqueous zinc-ion batteries(AZIBs), which has been extensively explored over the past 5 years. The functional principles behind the improvement are widely discussed but have been limited to the enlargement of interspace between VO layers. As the different types of ions could change the properties of vanadium oxides in various ways, the review starts with a comprehensive overview of pre-intercalated vanadium oxide cathode with different types of molecules and ions, such as metal ions, water molecules, and non-metallic cations, along with their functional principles and resulting performance. Furthermore, the pre-intercalated vanadium cathodes reported so far are summarized, comparing their interlayer space, capacity, cycling rate, and capacity retention after long cycling. A discussion of the relationship between the interspace and the performance is provided. The widest interspaces could result in the decay of the cycling stability. Based on the data, the optimal interspace is likely to be around 12 ?, indicating that precise control of the interspace is a useful ***, more consideration is required regarding the other impacts of pre-intercalated ions on vanadium oxide. It is hoped that this review can inspire further understanding of pre-intercalated vanadium oxide cathodes, paving a new pathway to the development of advanced vanadium oxide cathodes with better cycling stability and larger energy density.

关键词： energy storage system pre-intercalated cathode vanadium oxides Zn-ion battery

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