检索结果-内蒙古大学图书馆

Density-functional-theory predictions of mechanical behaviour and thermal properties as well as experimental hardness of the Ga-bilayer Mo_(2)Ga_(2)C

引用

Journal of advanced Ceramics 2022年第2期11卷 273-282页

作者： Xinxin QI Weilong YIN Sen JIN Aiguo ZHOU Xiaodong HE Guangping SONG Yongting ZHENG Yuelei BAI National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150080China School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuo 454003China

Mo_(2)Ga_(2)C is a new MAX phase with a stacking Ga-bilayer as well as possible unusual *** understand this unique MAX phase structure and promote possible future applications,the structure,chemical bonding,and mechanical and thermodynamic properties of Mo_(2)Ga_(2)C were investigated by *** the“bond stiffness”model,the strongest covalent bonding(1162 GPa)was formed between Mo and C atoms in Mo_(2)Ga_(2)C,while the weakest Ga–Ga(389 GPa)bonding was formed between two Ga-atomic layers,different from other typical MAX *** ratio of the bond stiffness of the weakest bond to the strongest bond(0.33)was lower than 1/2,indicating the high damage tolerance and fracture toughness of Mo_(2)Ga_(2)C,which was confirmed by indentation without any *** high-temperature heat capacity and thermal expansion of Mo_(2)Ga_(2)C were calculated in the framework of quasi-harmonic approximation from 0 to 1300 *** of the metal-like electronic structure,the electronic excitation contribution became more significant with increasing temperature above 300 K.

关键词： MAX phase first-principles damage tolerance heat capacity thermal expansion

来源：评论

学校读者我要写书评

暂无评论

Fabrication of multi-anionic high-entropy carbonitride ultra-high-temperature ceramics by a green and low-cost process with excellent mechanical properties

引用

Journal of advanced Ceramics 2023年第6期12卷 1258-1272页

作者： Liansen Xia Shun Dong Jianqiang Xin Kaixuan Gui Peitao Hu Yongshuai Xie Dongdong Yang Xinghong Zhang Yanchun Zhou National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China Institute for Aero Engine Tsinghua UniversityBejing 100084China School of Materials Science and Engineering Anhui Polytechnic UniversityWuhu 241000China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

As a new category of ultra-high-temperature ceramics(UHTCs),multi-anionic high-entropy(HE)carbonitride UHTCs are expected to have better comprehensive performance than conventional ***,how to realize the green and low-cost synthesis of high-quality multi-anionic HE carbonitride UHTC powders and prepare bulk ceramics with excellent mechanical properties still faces great *** this work,a green,low-cost,and controllable preparation process of(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C,N_(1-x) powders is achieved by sol-gel combined with the carbothermal reduction/nitridation method for the first *** as-synthesized(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C_(x)N_(1-x) powders possess high compositional uniformity and controllable particle *** addition,the obtained bulk ceramics prepared at 1800℃exhibit superior fracture toughness(Kic)of 5.39±0.16 MPa·m^(1/2) and high nanohardnesof 35.75±1.23 GPa,lastic modulus(E)of 566.70±8.68 GPa,and flexural strength of 487±41 *** study provides a feasible strategy for preparing the high-performance HE carbonitride ceramics in a more environmentally friendly and economical manner.

关键词： high-entropy(HE)carbonitride ceramics multi-anionic structure sol-gel green synthesis mechanical properties

来源：评论

学校读者我要写书评

暂无评论

A surfactant-modified composite separator for high safe lithium ion battery

引用

Journal of Energy Chemistry 2023年第1期76卷 398-403,I0010页

作者： Botao Yuan Niandong He Yifang Liang Liwei Dong Jipeng Liu Jiecai Han Weidong He Yuanpeng Liu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080HeilongjiangChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080HeilongjiangChina Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China

Separators have been gaining increasing attention to improve the performance of lithium ion batteries(LIBs),especially for high safe and long cycle ***,commercial polyolefin separators still face the problems of rapid capacity decay and safety issues due to the poor wettability with electrolytes and low thermal ***,a novel composite separator is proposed by introducing a surfactant of sodium dodecyl thiosulfate(SDS)into the polytetrafluoroethylene(PTFE)substrate with the binder of polyacrylic acid(PAA)through the suction filtration *** introduction of PAA/SDS enhances the adsorption energy between PTFE substrate and electrolyte through density functional theory calculations,which improves wettability and electrolyte uptake of the separator *** asachieved composite separator enables the LIBs to own high Li^(+)conductivity(0.64×10^(-3)S cm^(-1))and Li^(+)transference number(0.63),further leading to a high capacity retention of 93.50%after 500 cycles at 1 *** addition,the uniform and smooth surface morphology of Li metal employed the composite separator after cycling indicates that the lithium dendrites can be successfully *** work indicates a promising route for the preparation of a novel composite separator for high safe LIBs.

关键词： Composite separator PTFE Surfactant High safe Lithium ion batteries

来源：评论

学校读者我要写书评

暂无评论

Optimal Design of Composite Structures for Unmanned Aerial Vehicles Based on Deep Learning 15

Optimal Design of Composite Structures for Unmanned Aerial V...

引用

15th Asia Conference on Mechanical and Aerospace Engineering, ACMAE 2024

作者： Xiang, Zijian Ma, Zhenyu Yang, Xixiang Deng, Xiaolong Lin, Guochang College of Aerospace Science and Engineering National University of Defense Technology Changsha410073 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China

ISBN: (纸本)9781643685892

Composite materials are characterized by their lightweight and high-strength properties. Modern drone bodies predominantly utilize laminate structures made from composite materials. This article explores the application of deep learning methods in the design process of drone composite material structures, aiming to achieve weight reduction while maintaining structural strength and stiffness. To this end, we first conducted a study on the mechanical properties of composite laminates and employed a generative adversarial network (GAN) model to perform an inversion analysis of the single-layer parameters of the laminate. Subsequently, we executed a finite element simulation study of the UAV composite structure and applied the GAN model for inversion analysis. The laminate layering parameters were optimized and analyzed. The results indicate that the deep learning approach significantly enhances the accuracy of parameter inversion and the efficiency of layering design for composite laminate structures, demonstrating substantial application value for the optimal design of UAV composite material structures. © 2025 The Authors.

关键词： Laminated composites

来源：评论

学校读者我要写书评

暂无评论

Element-based Peridynamics for Heat Conduction Problems of Isotropic and Anisotropic Materials With Crack Propagation

引用

Journal of Peridynamics and Nonlocal Modeling 2024年第4期6卷 725-772页

作者： Liu, Shuo Liang, Jun Fang, Guodong Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China Science and Technology on Advanced Composites in Special Environment Key Laboratory Harbin Institute of Technology Harbin 150001 China

Element-based peridynamics (EBPD) for transient and steady heat conduction of isotropic and anisotropic materials is proposed, which can conveniently study the thermal transfer problems with cracks. The interactions of EBPD are described using 2-node rod elements for one-dimensional (1D) problems, 3-node triangle elements for two-dimensional (2D) problems and 4-node tetrahedron elements for three-dimensional (3D) problems. An additional rule constructing elements in the EBPD is added to reduce element numbers and delete the low mesh quality elements. The EBPD transient heat conduction equations are derived from the Lagrangian formalism, and the steady heat conduction equations are obtained by the variation principle. The treatments of surface effects, boundary conditions and crack descriptions are provided in detail. The forward difference time increment scheme and Gauss elimination method are used to solve transient and steady heat conduction problems respectively. A series of numerical examples, including 1D, 2D and 3D transient and steady heat conduction problems, are used to validate the proposed EBPD model. The temperature fields of the model with cracks are solved by the proposed method, which has the potential to study thermomechanical and thermal shock problems. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Element-based Heat conduction Nonlocal Peridynamics

来源：评论

学校读者我要写书评

暂无评论

Material response model with artificial neural networks for ablation analysis of lightweight silicone-modified phenolic matrix nanocomposites

引用

composites science and technology 2025年 267卷

作者： Xiao, Jie Fang, Guodong Zhang, Yisheng Qin, Xiaoqiang Wang, Hongyue Hong, Changqing Meng, Songhe National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150001 China

Polymer matrix thermal protection materials are developing towards lightweight, better thermal insulation and oxidation resistance to satisfy the requirements of planetary entry vehicles, which have a strong gas-solid interaction in the aerodynamic heating environment. A material response model with an artificial neural network (ANN) is developed to study the thermochemical responses of the lightweight silicone-modified phenolic matrix nanocomposites. The ANN is designed to determine the real-time dimensionless char blowing rate and wall enthalpy for the material response model. A constant offset of the dimensionless char blowing rate is added to account for the contribution of multiple constituents of the material surface to the ablation wall. The material response model is validated against three plasma heating test cases in terms of surface temperature, in-depth temperature, and recession. A three-step ablation mechanism is revealed through molecular dynamics simulations, comprising thermal decomposition of the polymer, phase separation/rearrangement, and an enhancement in crystallinity. The effect of ambient pressure on the ablation response is further investigated and found that the lower pressures can lead to higher surface material consumption and higher recession rate due to the reduced blowdown flux of pyrolysis gases. © 2025

关键词： Thermal insulation

来源：评论

学校读者我要写书评

暂无评论

STUDY ON SNPPING-THROUNGH BEHAVIOR OF BISTABLE COMPOSITE LAMINATE ACTUATED BY MFC 23

STUDY ON SNPPING-THROUNGH BEHAVIOR OF BISTABLE COMPOSITE LAM...

引用

23rd International Conference on Composite Materials, ICCM 2023

作者： Liu, Xiaohui Li, Sipeng Li, Yanqi Dai, Fuhong National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology China

来源：评论

学校读者我要写书评

暂无评论

PIEZOELECTRIC ENERGY CAN BE HARVESTED FROM WIND-INDUCED VIBRATIONS BY UTILIZING A FISHTAIL-LIKE ENERGY HARVESTER 23

PIEZOELECTRIC ENERGY CAN BE HARVESTED FROM WIND-INDUCED VIBR...

引用

23rd International Conference on Composite Materials, ICCM 2023

作者： Dai, Fuhong Liu, Xiaohui National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology China

来源：评论

学校读者我要写书评

暂无评论

Rubik’s cube as in-situ programmable matter and a reconfigurable mechanical metamaterial

引用

science China(Technological sciences) 2024年第10期67卷 3221-3234页

作者： ZHU ShaoWei CHEN Huan YANG XiaoQiang TAN Li JIN Shuai CHEN LiMing LIU Tao TAN XiaoJun WANG LianChao WANG Bing MUAMER Kadic State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400030China College of Aerospace Engineering Chongqing UniversityChongqing 400030China School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710129China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Institut FEMTO-ST CNRS UMR 6174University BourgogneFranche-ComtBesan¸con 25000France

As part of the 4th industrial revolution,programmable mechanical metamaterials exhibit great application potential in flexible robotics,vibration control,and impact ***,maintaining a programmed state without sustaining the external stimulus is often challenging and leads to additional energy *** by Rubik’s cube,we design and study an in-situ programmable and distribution-reconfigurable mechanical metamaterial(IPDR-MM).A matrix model is developed to model IPDR-MMs and describe their morphological *** on this model,the reinforcement learning method is employed to find the pathways for morphological *** find that IPDR-MMs have controllable stiffness across several orders of magnitude and a wide range of adjustable anisotropies through morphology ***,because of the independence of the directions of morphology transformation and bearing,IPDR-MMs exhibit good stability in bearing and can readily achieve high *** Rubik’s cube-inspired design concept is also instructive for other deformable structures and metamaterials,and the current version of the proposal should be sufficiently illustrative to attract and broaden interdisciplinary interests.

关键词： mechanical metamaterials in-situ programmable distribution-reconfigurable Rubik’s cube controllable stiffness and anisotropy

来源：评论

学校读者我要写书评

暂无评论

Sinusoidally architected helicoidal composites inspired by the dactyl club of mantis shrimp

引用

International Journal of Smart and Nano Materials 2023年第3期14卷 321-336页

作者： Ruiheng Yang Huitian Wang Bing Wang Sheng Zhang Zhiping Huang Sha Yin Department of Automotive Engineering School of Transportation Science and EngineeringBeihang UniversityBeijing 100191China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinChina WAY Business Solutions GmbH Jiangsu Changshu Automotive Trim Group Co.LtdChangshuChina

The impact region of the dactyl club of mantis shrimp features a rare sinusoidally helicoidal architecture,contributing to its efficient impact-resistant *** study aims to attain bioinspired sinusoidally architected composites from a practical engineering *** features of plain-woven fabric were characterized,which demonstrated that the interweaving warp and weft yarns exhibited a sinusoidal *** woven composites were thus employed and helicoidally stacked to achieve the desired ***-static three-point bending and low-velocity impact tests were subsequently performed to evaluate their mechanical *** three-point bending condi-tion,the dominant failure mode gradually changed from fiber breakage to delamination with the increase in the pitch *** displacement and energy absorption of the heli-coidal woven composites were,respectively,43.89%and 141.90%greater than the unidirectional *** low-velo-city impact condition,the damage area of the helicoidal woven composites decreased by 49.66%while the residual strength increased by 10.10%compared with those of the unidirectional ones,exhibiting better damage resistance and ***,effects of fiber architecture on mechanical properties were *** work will shed light on future design of the next-generation impact-resistant architected composites.

关键词： Bioinspired composites architected materials thermoplastic composites mechanical properties impact behavior

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：