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第二十一届国际复合材料大会

作者： LIU Shuo FANG Guodong LIANG Jun WANG Bing Science and Technology on Advanced Composites in Special Environments Key Laboratory Harbin Institute of Technology Institute of advanced technology Beijing Institute of Technology

A new method of coupling finite element method(FEM) and peridynamics(PD) is proposed to analyze the progressive damage of fiber reinforced composite laminate. The computational efficiency of FEM is higher than peridynamics. But peridynamics is good at calculating discontinuous solution. In order to exert the advantages of the above two methods, the solution is divided into three parts. In the dangerous region, peridynamics is adopted. And FEM is used in the non-dangerous region. The remaining region is the coupling FEM/PD region, where the peridynamics particles are interacted with neighboring finite element nodes each other. And the contribution stiffness of FEM and peridynamics particles can be written in the global stiffness matrix together. The substructure method is also used to reduce computational effort further. The progressive damage and failure modes of composite laminates under a tensile load can be successfully analyzed. It is shown that this proposed method had a great potential to analyze the mechanical behavior of composites.

关键词： composite laminate peridynamics coupling damage failure mode

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SUPERHIGH THERMAL CONDUCTIVITY OF THREE-DIMENSIONAL GRAPHENE-BASED NANOCOMPOSITE

SUPERHIGH THERMAL CONDUCTIVITY OF THREE-DIMENSIONAL GRAPHENE...

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第二十一届国际复合材料大会

作者： Yibin Li Xianxian Sun Fan Xu Zaishan Lin Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology

Graphene was discovered in 2004 and has been attracted more and more attention due to unique physical and mechanical *** unique physical properties, the thermal conductivity of graphene is highest among the materials known as far, which is most attractive in the thermal management ***, how to construct the single-layered graphene into three-dimensional macroscopic nanocomposite with superhigh thermal conductivity is still a *** we propose a novel method to assemble few-layered graphene with no defects into three-dimensional macroscopic graphene-based nanocomposite bulk with oriented graphene *** graphene-based nanocomposite has superhigh thermal conductivity of 1250 W/m.K, three times that of pure ***, the density of graphene-based nanocomposite is less than 2.0 g/cm, only two-ninth that of pure *** graphene-based nanocomposite is very promising in the thermal management, especially for the high-power-density devices.

关键词： Graphene-based nanocomposite Three-dimensional High thermal conductivity

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ULTRA-CONDUCTIVITY LOW THERMAL CONDUCTIVITY OF HIGHLY ORIENTED AND HOLLOW SPHERE-ATTACHING WALLED GRAPHENE/PI NANOCOMPOSITE FOAM

ULTRA-CONDUCTIVITY LOW THERMAL CONDUCTIVITY OF HIGHLY ORIENT...

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第二十一届国际复合材料大会

作者： Qingyu Peng Yuyang Qin Xiaodong He Yibin Li National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology

Excellent thermal insulation applied at super low temperature is in increasing demand,where the thermal conductivity is expected as low as ***, how to get the ultralow thermal conductivity of thermally insulating materials is still a ***, we report lightweight, mechanically flexible, highly oriented and super-insulating graphene/polyimide nanocomposite foams with hollow graphene spherical *** nanocomposite foam has an ultra-low thermal conductivity of 0.01 W m K along radial *** is attributed to the highly oriented walls of graphene/polyimide driven by directional ice growth during the process of liquid nitrogen freezing and hollow graphene spherical structures which can strongly impede the heat transport and lead to a significant decrease of thermal conductivity in radial *** anisotropic nanocomposite foams may provide new insights into the improvement of energy efficiency and exhibit as an effective and promising insulating materials for thermal management.

关键词： Composite foam Graphene foam Thermal insulation

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Effects of graphene mass fraction and aspect ratio on elastic properties of Graphene-based composites

Effects of graphene mass fraction and aspect ratio on elasti...

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第二十一届国际复合材料大会

作者： Zhenmeng Xia Changguo Wang Huifeng Tan Center for Composite Materials Harbin Institute of Technology National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology

Graphene-based nanocomposites have attracted tremendous research interest over the past decade due to their unique mechanical, thermal, electronic, and chemical properties and excellent properties of graphene as the reinforcement play an important role in these ***, this paper presents an equivalent discrete continuum model to accurately predict the elastic properties of graphene, including the Young’s modulus and Poisson’s ratio.A pseudo-beam with modified internal bending moment and variable stiffness is used to represent the C-C bond, as shown in *** calculating the deformation strain energies of unit cell, the parameter equivalence relationships between C-C bond and pseudo-beam are ***, the discrete continuum model is deduced based on the above pseudo-beam model combining Castigliano second *** choosing the appropriate force constants,the Young’s modulus and Poisson’s ratio of graphene are calculated compared with the open literatures, which verifies the availability and accuracy of the discrete continuum model, as shown in ***, considering that graphene is regarded as a rectangular inclusion, the averaged Eshelby’s tensor for a rectangular shape in different aspect ratios is obtained, which parameters can be determined by the properties of graphene predicted by the above ***, the elastic properties are predicted based on the Mori–Tanaka micro-mechanics *** effects of aspect ratio and mass fraction of graphene on the elastic properties of Graphene-based nanocomposites are *** results are as shown in *** work can guide the designer to accurately evaluate the elastic properties of Graphene-based nanocomposites for further applications.

关键词： Pseudo-beam model Mori–Tanaka method Elastic properties Graphene-based composites

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Corrigendum: Ethanol-controlled peroxidation in liquid-anode discharges (2019 J. Phys. D: Appl. Phys. 52 425205)

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Journal of Physics D: Applied Physics 2021年第22期54卷

作者： Qiang Chen Jiao Lin Xinyi He Hailong Hu Junshuai Li Qing Xiong Bingyan Chen Zhengyong Song Hai Liu Qing Huo Liu Kostya (Ken) Ostrikov Institute of Electromagnetics and Acoustics Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Department of Electronic Science Xiamen University Xiamen 361005 People's Republic of China College of Physics and Information Engineering Fuzhou University Fuzhou 350116 People's Republic of China Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education and School of Physical Science and Technology Lanzhou University Lanzhou 730000 People's Republic of China State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 People's Republic of China Department of Mathematics and Physics Hohai University Changzhou 213022 People's Republic of China School of Civil Engineering Guangzhou University Guangzhou 510006 People's Republic of China Department of Electrical and Computer Engineering Duke University Durham NC 27708 United States of America Institute for Future Environments and School of Chemistry Physics and Mechanical Engineering Queensland University of Technology Brisbane QLD 4000 Australia CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organization PO Box 218 Lindfield NSW 2070 Australia

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Preface

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science China(Technological sciences) 2019年第8期62卷 1245-1245页

作者： SHEN ShengPing ZHU Ting MENG SongHe FENG Xue State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace Engineering Xi 'an Jiaotong University Xi'an 710049 China Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA Science and Technology on Advanced Composites in Special Environments Key Laboratory Harbin Institute of Technology Harbin 150001 China AML Department of Engineering Mechanics Tsinghua University Beijing 100084 China Center for Flexible Electronics Technology Tsinghua University Beijing 100084 China

Materials chemomechanics is an exciting and fast growing field where mechanics meets chemistry, and has drawn increasing attention in recent years. It is concerned with the phenomena and mechanisms of coupled chemical and mechanical interactions. Chemomechanical coupling phenomena exist in many research areas, ranging from the development of advanced batteries, biomechanical engineering, hydrogen embrittlement, and high temperature oxidation. In fact, a typical chemomechanical problem usually involves the processes of diffusion, chemical reaction, deformation and stress generation. Such a strong coupling between chemistry and mechanics can give rise to the complex spatial-temporal evolution of composition, microstructure and morphology in materials.

关键词： Materials chemomechanics mechanics chemistry

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Coexistence of nontrivial topological properties and strong ferromagnetic fluctuations in A2Cr3As3 (A=Na, K, Rb and Cs)

arXiv

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arXiv 2019年

作者： Xu, Chenchao Wu, Ninghua Zhi, Guo-Xiang Lei, Bing-Hua Duan, Xu Ning, Fanlong Cao, Chao Chen, Qijin Department of Physics Zhejiang University Hangzhou310027 China Condensed Matter Group Department of Physics Hangzhou Normal University Hangzhou311121 China Westlake University Hangzhouzhejiang China Department of Physics Fudan University Shanghai China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China CAS Key Laboratory of Functional Materials and Devices for Special Environments Xinjiang Technical Institute of Physics and Chemistry CAS Xinjiang Key Laboratory of Electronic Information Materials and Devices 40-1 South Beijing Road Urumqi830011 China Shanghai Branch National Laboratory for Physical Sciences at Microscale Department of Modern Physics University of Science and Technology of China Shanghai201315 China

Superconductivity in crystals without inversion symmetry has received extensive attention due to its unconventional pairing and possible nontrivial topological properties. Using first-principles calculations, we systemically study the electronic structure of noncentrosymmetric superconductors A2Cr3As3 (A=Na, K, Rb and Cs). Topologically protected triply degenerate points connected by one-dimensional arcs appear along the C3 axis, coexisting with strong ferromagnetic (FM) fluctuations in the non-superconducting state. Within random phase approximation, our calculations show that strong enhancements of spin fluctuations are present in K2Cr3As3 and Rb2Cr3As3, and are substantially reduced in Na2Cr3As3 and Cs2Cr3As3. Symmetry analysis of spin-orbit coupling gk suggests that the arc surface states might remain stable in the superconducting state, giving rise to possible nontrivial topological properties. Copyright © 2019, The Authors. All rights reserved.

关键词： Topology

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Frontispiz: Phase-Junction Electrocatalysts towards Enhanced Hydrogen Evolution Reaction in Alkaline Media

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Angewandte Chemie 2020年第1期133卷

作者： Qiang Fu Prof. Xianjie Wang Prof. Jiecai Han Prof. Jun Zhong Tongrui Zhang Tai Yao Prof. Chengyan Xu Tangling Gao Dr. Shibo Xi Ce Liang Prof. Lingling Xu Prof. Ping Xu Prof. Bo Song School of Physics Harbin Institute of Technology Harbin 150001 P. R. China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150001 P. R. China Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou 215123 P. R. China Faculty of Science and Engineering University of Nottingham Ningbo 315100 P. R. China School of Materials Science and Engineering Harbin Institute of Technology (Shenzhen) Shenzhen 518055 P. R. China Institute of Petrochemistry Heilongjiang Academy of Sciences Harbin 150040 P. R. China Institute of Chemical and Engineering Sciences A*STAR Singapore 627833 Singapore School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. China Key Laboratory of Photonic and Electronic Bandgap Materials Ministry of Education School of Physics and Electronic Engineering Harbin Normal University Harbin 150080 P. R. China

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Phase-Junction Electrocatalysts towards Enhanced Hydrogen Evolution Reaction in Alkaline Media

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Angewandte Chemie 2020年第1期133卷

To ensure sustainable hydrogen production by water electrolysis, robust, earth-abundant, and high-efficient electrocatalysts are required. Constructing a hybrid system could lead to further improvement in electrocatalytic activity. Interface engineering in composite catalysts is thus critical to determine the performance, and the phase-junction interface should improve the catalytic activity. Here, we show that nickel diphosphide phase junction ( c -NiP 2 / m -NiP 2 ) is an effective electrocatalyst for hydrogen production in alkaline media. The overpotential (at 10 mA cm −2 ) for NiP 2 -650 ( c / m ) in alkaline media could be significantly reduced by 26 % and 96 % compared with c -NiP 2 and m -NiP 2 , respectively. The enhancement of catalytic activity should be attributed to the strong water dissociation ability and the rearrangement of electrons around the phase junction, which markedly improved the Volmer step and benefited the reduction process of adsorbed protons.

关键词： alkaline electrolytes electrocatalysis hydrogen evolution reaction phase junctions

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Frontispiece: Phase-Junction Electrocatalysts towards Enhanced Hydrogen Evolution Reaction in Alkaline Media

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Angewandte Chemie International Edition 2020年第1期60卷

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