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Bending Resistance and Anisotropy of Basalt Fibers Laminate Composite with bionic Helical Structure

Journal of bionic Engineering 2022年第3期19卷 799-815页

作者： Binjie Zhang Qigang Han Hanlin Qin Junqiu Zhang Shichao Niu Zhiwu Han Luquan Ren Key Laboratory of bionic Engineering(Ministry of Education China)Jilin UniversityChangchun130022China College of Materials Science and Engineering Jilin UniversityChangchun130022China weihai institute for bionic Jilin UniversityWeihai264200China

The appendages of mantis shrimp often bear bending loads from different directions during the in the process of preying on prey with its grazing ***,it has excellent bending resistance and isotropy to confront complex and changeable external *** outstanding performance owes to the helical Bouligand structure with a certain interlayer corner,which is also widely found in other natural ***,the bio-inspired materials with basalt fiber are fabricated with outstanding bending resistance,isotropy and *** research shows laminates with 18°interlayer corners exhibit relatively excellent bending resistance and isotropy,and the laminate with 11.25°interlayer corner has best *** with traditional composites,average bending strength along different loading direction of bio-inspired materials increased by 28%,and anisotropy decreased by 86%.Besides,the maximum toughness of laminates can increase to 1.7 times of the *** the introduction of interlayer corners,the bio-inspired composite tends to be *** explore the reason for the change of the isotropic performance caused by diverse interlayer corners,the Finite Element Analysis based on classical laminate theory and Tsai–Wu and Tsai–Hill failure ***,further experiments and observations are conducted to explore possible *** conclusion,following the introduction of interlayer corners,the bio-inspired composites tend to be *** bio-inspired composites are expected to be applied to various complex modern engineering fields,such as vehicle,rail transit and aerospace.

关键词： Helical Bouligand structure Bio-inspired composites Bending resistance Isotropy

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Bioinspired Multi-Metal Structures Produced via Direct Ink Writing

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Journal of bionic Engineering 2022年第6期19卷 1578-1588页

作者： Chao Xu Xiang Chen Wenzheng Wu Qingping Liu Luquan Ren Key Laboratory of bionic Engineering(Ministry of Education) Jilin UniversityChangchun130000China weihai institute of bionics Jilin UniversityWeihai264400China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun130000China

Bioinspired Multi-Metal Structures(MMSs)combine distinct properties of multiple materials,benefiting from improved properties and providing superior *** Manufacturing(AM)exhibits enormous advantages in applying different materials and geometries according to the desired functions at specific locations of the structure,having great potential in fabricating multi-materials ***,current AM techniques have difficulty manufacturing 3D MMSs without material cross-contamination flexibly and *** study demonstrates a reliable,fast,and flexible direct ink writing method to fabricate 3D *** in-situ material-switching system enables the deposition of multiple metallic materials across different layers and within the same layer.3D Fe-Cu MMSs with complex geometries and fine details are fabricated as proof of *** microstructures,chemical and phase compositions,and tensile fracture surfaces of the Fe-Cu interfaces indicate a well-bonded interface without cracks,delamination,or material *** envision this novel method making other metallic combinations and even metal-ceramic *** paves the way for manufacturing 3D MMSs using AM and establishes the possibilities of numerous MMSs applications in engineering fields.

关键词： Bioinspired bionic Multi-metal structure(MMS) Direct ink writing(DIW)Additive manufacturing(AM)

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Bioinspired Strategies for Excellent Mechanical Properties of Composites

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Journal of bionic Engineering 2022年第5期19卷 1203-1228页

作者： Xianchang Peng Binjie Zhang Ze Wang Wenbo Su Shichao Niu Zhiwu Han Luquan Ren Key Laboratory of bionic Engineering Ministry of EducationJilin University130022 ChangchunChina weihai institute for bionics Jilin UniversityWeihai 264200China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130022China

Developing high-performance composite materials is of great significance as a strong support for high-end ***,the design and optimization of composite materials lack a theoretical basis and guidance *** with traditional composite materials,natural materials are composed of relatively limited components but exhibit better mechanical properties through ingenious and reasonable synthetic *** on this,learning from nature is considered to be an effective way to break through the bottleneck of composite design and *** this review,the recent progress of natural composites with excellent properties is *** factors,including structures,components and interfaces,are first summarized to reveal the strategies of natural materials to achieve outstanding mechanical *** addition,the manufacturing technologies and engineering applications of bioinspired composite materials are ***,some scientific challenges and outlooks are also proposed to promote next-generation bioinspired composite materials.

关键词： Bioinspired Composites Mechanical properties Manufacturing technologies Engineering application

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Antifouling Technology Trends in Marine Environmental Protection

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Journal of bionic Engineering 2021年第2期18卷 239-263页

作者： Limei Tian Yue Yin Wei Bing E Jin Key Laboratory of bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China weihai institute for bionics-Jilin University Weihai 264207China School of Chemistry and Life Science Changchun University of TechnologyChangchun 130012China

Marine fouling is a worldwide problem,which is harmful to the global marine ecological environment and economic *** traditional antifouling strategy usually uses toxic antifouling agents,which gradually exposes a serious environmental ***,green,long-term,broad-spectrum and eco-friendly antifouling technologies have been the main target of engineers and *** recent years,many eco-friendly antifouling technologies with broad application prospects have been developed based on the low toxicity and non-toxicity antifouling agents and *** this review,contemporary eco-friendly antifouling technologies and materials are summarized into bionic antifouling and non-bionic antifouling strategies(2000-2020).Non-bionic antifouling technologies mainly include protein resistant polymers,antifoulant releasing coatings,foul release coatings,conductive antifouling coatings and photodynamic antifouling *** antifouling technologies mainly include the simulated shark skin,whale skin,dolphin skin,coral tentacles,lotus leaves and other biology *** future research directions and challenges are also discussed in the end,and we expect that this review would boost the development of marine antifouling technologies.

关键词： biofouling antifouling technologies bionic non-bionic biofilm

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Design of a Flexible bionic Ankle Prosthesis Based on Subject-specific Modeling of the Human Musculoskeletal System

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Journal of bionic Engineering 2023年第3期20卷 1008-1020页

作者： Jianqiao Jin Kunyang Wang Lei Ren Zhihui Qian Wei Liang Xiaohan Xu Shun Zhao Xuewei Lu Di Zhao Xu Wang Luquan Ren Key Laboratory of bionic Engineering Ministry of EducationJilin UniversityChangchun130025China weihai institute for bionics Jilin UniversityWeihai264402China School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK

A variety of prosthetic ankles have been successfully developed to reproduce the locomotor ability for lower limb amputees in daily lives. However, they have not been shown to sufficiently improve the natural gait mechanics commonly observed in comparison to the able-bodied, perhaps due to over-simplified designs of functional musculoskeletal structures in prostheses. In this study, a flexible bionic ankle prosthesis with joints covered by soft material inclusions is developed on the basis of the human musculoskeletal system. First, the healthy side ankle–foot bones of a below-knee amputee were reconstructed by CT imaging. Three types of polyurethane rubber material configurations were then designed to mimic the soft tissues around the human ankle, providing stability and flexibility. Finite element simulations were conducted to determine the proper design of the rubber materials, evaluate the ankle stiffness under different external conditions, and calculate the rotation axes of the ankle during walking. The results showed that the bionic ankle had variable stiffness properties and could adapt to various road surfaces. It also had rotation axes similar to that of the human ankle, thus restoring the function of the talocrural and subtalar joints. The inclination and deviation angles of the talocrural axis, 86.2° and 75.1°, respectively, as well as the angles of the subtalar axis, 40.1° and 29.9°, were consistent with the literature. Finally, dynamic characteristics were investigated by gait measurements on the same subject, and the flexible bionic ankle prosthesis demonstrated natural gait mechanics during walking in terms of ankle angles and moments.

关键词： Ankle prosthesis bionic design Soft materials Variable stiffness Gait mechanics

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MOF-derived zinc manganese oxide nanosheets with valence-controllable composition for high-performance Li storage

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Green Energy & Environment 2021年第5期6卷 703-714页

作者： Yu Du Yihan Xu Weiwei Zhou Yaoyang Yu Xinzhou Ma Fei Liu Jinglong Xu Yongming Zhu School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihai264209China School of Marine Science and Technology Harbin Institute of Technology at WeihaiWeihai264209China

Zinc manganese oxide(ZMO)system represents a notable family of mixed transition metal oxides(MTMOs)because of their superiority of the high theoretical capacity,adequacy of natural content,and low ***,the methods to match both the reliable synthesis and the designable construction of large-sized two-dimensional(2D)ZMO nanosheets are still considered as grand ***,we have successfully realized the preparation of 2D ZMO nanosheets with large lateral sizes up to~20 mm by simple pyrolysis of 2D metal–organic framework(MOF)nanosheets *** growth mechanism of 2D MOF is proposed to be based on the lamellar micelles formed by polyvinyl pyrrolidone(PVP).The obtained 2D and porous ZMO nanosheets exhibit high specific capacity as well as good rate *** importantly,the as-prepared ZMO electrode shows a remarkable capacity increment upon cycling(from 832 mAh g^(-1) at the 2nd cycle to 1418 mAh g^(-1) at the 700th cycle,at 1 A g^(-1)).Through simple adjustment of the calcination temperature,the valence state of Mn species in the yielding ZMO samples can be *** systematic investigation towards these ZMOs containing different Mn species,the extra specific capacity is revealed to be chiefly on account of the arising of the valence state of Mn upon the cycling ***,it is disclosed that the higher-valent Mn the pristine ZMO contains,the more additional capacity it gains upon *** believe that this work will inspire more detailed analysis on the relationship between the valence state of Mn and extra capacity.

关键词： Two-dimensional Nanosheets Zinc manganese oxide Metal–organic framework Lithium-ion battery

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Introducingωand O'nanodomains in Ti-6Al-4V:The mechanism of acceleratingα→βtransformation kinetics via electropulsing

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Journal of Materials Science & Technology 2023年第31期162卷 109-117页

作者： Yachong Zhou Xiaofeng Xu Yang Zhao Xudong Yan Lai Wei Zhicheng Wu Chao Wu Key Laboratory of Automobile Materials Ministry of EducationDepartment of Materials Science and EngineeringJilin UniversityChangchun 130000China weihai institute for bionics-Jilin University Weihai 264200China Key Laboratory of bionic Engineering Ministry of EducationJilin UniversityChangchun 130000China

Conventional kinetics theory for diffusion-controlled phase transformation shows that the reverse transition should lag behind the temperature rise through rapid heating,i.e.,overheating is *** this work,we found that theβ-transus temperature decreased by∼50℃ during studying theα→βtransformation in Ti-6Al-4V alloy via electropulsing treatment(EPT).The calculation suggests that the acceleration of transformation kinetics cannot be fully explained by Joule heat and athermal effects of the electromigration effect and electron wind *** microstructural evolution during EPT was systematically investigated utilizing scanning electron microscope(SEM),electron backscattered diffraction(EBSD),X-ray diffraction(XRD),transmission Kikuchi diffraction(TKD),and transmission electron micro-scope(TEM).Microscopic analysis shows that the nano-sizedωand O'phases formed in theβphase,which causes large numbers of lattice distortion *** defects are conducive to accelerating the bulk diffusion of alloying elements inβ.Moreover,the nanodomains limited the growth of martensite,therefore nanocrystalline martensite formed after *** findings develop the understanding of the destructive effect of current on metallic crystal,which will help to guide microstructural regulation in titanium and other alloys.

关键词： Titanium alloy Phase transformation kinetics Electropulsing Nanodomain Diffusion

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Design of bionic water jet thruster with double-chamber driven by electromagnetic force

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International Journal of Mechanical System Dynamics 2024年第3期4卷 292-302页

作者： Chong Cao Yasong Zhang Chengchun Zhang Chun Shen Wen Cheng Zhenjiang Wei Zhengyang Wu Luquan Ren Key Laboratory of bionic Engineering(Ministry of Education) Jilin UniversityChangchunChina weihai Junming Power Technology Co.Ltd. WeihaiChina

In response to the limitations of the single-chamber water jet thruster used in underwater vehicles mimicked by natural cephalopods,a novel approach involving a double-chamber water jet thruster has been *** thruster utilizes electromagnetic force to manipulate the diaphragm,thereby altering the volume of the upper and lower chambers to achieve water jet *** investigations were conducted to determine the tensile length-force characteristics of the diaphragm made of ***,key parameters of essential propulsion components,such as solenoid coils,electromagnets,and currents,were established based on the tensile length-force curve,and the propulsion capabilities of the system were evaluated through theoretical *** assessments indicate that the system does not produce reverse thrust regardless of whether the coil moves up or *** experimental results demonstrate that the maximum peak propulsion force generated by the dual-chamber water jet thruster within a 3-s cycle is 0.253N.

关键词： water jet thruster diaphragm electromagnetic force

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One-step synthesis of recoverable CuCo2S4 anode material for high-performance Li-ion batteries

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 595-604页

作者： Tongzhou Lu Yongzheng Zhang Chun Cheng Yanbin Wang Yongming Zhu Department of Applied Chemistry Harbin Institute of Technology at WeihaiWeihai 264209China

A facile one-step hydrothermal method has been adopted to directly synthesize the CuCo2S4 material on the surface of Ni *** to the relatively large specific surface area and wide pore size distribution,the CuCo2S4 material not only effectively increases the reactive area,but also accommodates more side reaction products to avoid the difficulty of mass *** evaluated as anode for Li-ion batteries,the CuCo2S4 material exhibits excellent electrochemical performance including high discharge capacity,outstanding cyclic stability and good rate *** the current density of 200 mA·g^-1,the CuCo2S4 material shows an extremely high initial discharge capacity of 2510 mAh·g^-1,and the cycle numbers of the material even reach 83 times when the discharge capacity is reduced to 500 mAh·g^-***,the discharge capacity can reach 269 mAh·g^-1 at a current of 2000 mA·g^-*** importantly,when the current density comes back to 200 mA·g^-1,the discharge capacity could be recovered to 1436 mAh·g^-1,suggesting an excellent capacity recovery characteristics.

关键词： copper cobalt sulfide recoverability one-step hydrothermal method anode material Li-ion battery

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Regression model for civil aero-engine gas path parameter deviation based on deep domainadaptation with Res-BP neural network

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Chinese Journal of Aeronautics 2021年第1期34卷 79-90页

作者： Xingjie ZHOU Xuyun FU Minghang ZHAO Shisheng ZHONG Department of Mechanical Engineering Harbin Institute of Technology at WeihaiWeihai 264209China

The variations in gas path parameter deviations can fully reflect the healthy state of aeroengine gas path components and units;therefore,airlines usually take them as key parameters for monitoring the aero-engine gas path performance state and conducting fault *** the past,the airlines could not obtain deviations *** present,a data-driven method based on an aero-engine dataset with a large sample size can be utilized to obtain the ***,it is still difficult to utilize aero-engine datasets with small sample sizes to establish regression models for deviations based on deep neural *** obtain monitoring autonomy of each aero-engine model,it is crucial to transfer and reuse the relevant knowledge of deviation modelling learned from different aero-engine *** paper adopts the Residual-Back Propagation Neural Network(Res-BPNN)to deeply extract high-level features and stacks multi-layer Multi-Kernel Maximum Mean Discrepancy(MK-MMD)adaptation layers to map the extracted high-level features to the Reproduce Kernel Hilbert Space(RKHS)for discrepancy *** further reduce the distribution discrepancy of each aero-engine model,the method of maximizing domain-confusion loss based on an adversarial mechanism is introduced to make the features learned from different domains as close as possible,and then the learned features can be *** the above methods,domain-invariant features can be extracted,and the optimal adaptation effect can be ***,the effectiveness of the proposed method is verified by using cruise data from different civil aero-engine models and compared with other transfer learning algorithms.

关键词： Civil aero-engine Deep domain adaptation Domain confusion Neural networks Transfer learning

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