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力学与实践 2007年第2期29卷 9-17页

作者：陈少华苏爱嘉中国科学院力学研究所非线性力学国家重点实验室北京100080 香港大学机械工程系

介绍了动物及昆虫黏附能力及黏附系统的实验研究,重点介绍了力学仿生动物及昆虫的黏附能力及黏附系统的研究工作．还简单介绍实验室仿生制备及仿生黏附潜在的用途,并对仿生黏附力学新的研究方向提出建议．

关键词：黏附力学仿生力学壁虎及昆虫微型机器人

ON THE EFFECT OF NANO-PARTICLE CLUSTERING ON TOUGHENING OF NANO-COMPOSITE CERAMICS

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Acta Mechanica Sinica 2002年第2期18卷 146-158页

作者：董照旭方岱宁苏爱嘉 Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China Department of Mechanical EngineeringThe University of Hong KongHong KongChina

In this paper,two and three-dimensional clustering models are de-veloped to characterize the effect of nano-particle clustering on toughening of nano-composite *** is found that crack pinning toughens the nano-compositeceramics because a higher stress intensity factor is needed for crack to propagatearound or to pull-out the *** nano-particle along the grain boundarysteers the crack into the matrix grain due to the strong cohesion between the nano-particle and the *** the fracture resistance of the grain boundary is lowerthan that of the grain lattice,the higher the probability of transgranular fractureinduced by nano-particles,the tougher is the ***,both crackpinning and transgranular fracture are affected by nano-particle ***-particle clustering,which increases with increasing volume fraction of nano-particles,leads to reduction of both the strength and toughness of the nano-composite *** larger the size of the clustered particle,and the more defects it contains,theeasier it is for the crack to pass through the clustered particle,which means that thenano-particle clustering can reduce toughening induced by crack pinning and trans-granular *** theoretical prediction,based on the combination of the threemechanisms of nano-particles,is in agreement with the experimental data.

关键词： nano-particle clustering ceramic fracture toughening mechanism

ELECTROMECHANICAL DEFORMATION AND FRACTURE OF PIEZOELECTRIC/FERROELECTRIC MATERIALS

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Acta Mechanica Sinica 2001年第3期17卷 193-213页

作者：方岱宁苏爱嘉刘金喜 Department of Engineering Mechanics Tsinghua University Beijing China 100084 Department of Mechanical Engineering the University of Hong Kong Hong Kong Department of Mechanics and Engineering Science Shijiazhuang Railway Institute Shijiazhuang China 050043

This review presents the progress and current status of the investigation on electromechanical deformation and fracture of piezo electric/ferroelectric materials. An attempt is made to summarize a few fundamental aspects, which include electromechanical constitutive relations, piezoelectric micromechanics and electric fracture and fatigue, instead of describing all technological backgrounds, basic physics, experimental findings, and theoretical developments. A number of open questions and future prospective are presented. It is hoped that this review will encourage people to join the exploration of this important and interesting field.

关键词： electromechanical deformation electric fracture and fatigue piezoelectric/ferroelectric materials

Analysis of Frequency Spectrum of Laser-Induced Vibration of Microbeam Resonators

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Chinese Physics Letters 2006年第6期23卷 1554-1557页

作者：方岱宁孙玉鑫苏爱嘉 Department of Engineering Mechanics Tsinghua University Beijing 100084 Department of Mechanical Engineering University of Hong Kong Hong Kong

The vibration phenomenon during pulsed laser heating of micro-beams is investigated. The beam is made of silicon and is heated by a laser pulse with a non-Gaussian temporal profile and with an ultrashort pulse duration of 2ps, which incites vibration due to the thermoelastic damping effect. This coupled thermoelastic problem is solved using an analytical-numerical technique based on the Laplace transformation. The damping ratio and resonant frequency shift ratio of beams due to the air damping effect and the thermoelastic damping effect are also examined and discussed.

关键词： THERMOELASTIC INTERNAL-FRICTION MEDIA

EXPERIMENTAL AND THEORETICAL STUDY OF THE NONLINEAR RESPONSE OF A GIANT MAGNETOSTRICTIVE ROD

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Acta Mechanica Sinica 2003年第4期19卷 324-329页

作者：万永平方岱宁苏爱嘉黄克智 Department of Engineering Mechanics Tsinghua University Beijing 100084 China

In this paper, a magnetomechanical coupling constitutive relation of the giant magnetostrictive material was investigated experimentally and theoretically. A grain-oriented magnetostrictive rod of iron and rare earth was tested under a combined magnetomechanical loading. Two types of experimental curves were obtained, i.e., the magnetostrictive curve of the extensional strain vs the magnetic field, and the curve of the magnetic polarization intensity vs the pre-stress. A new theoretical constitutive model, based on the density of domain switching, is developed. Comparison of the theoretical predictions with the experimental results indicates that this model can capture the main characteristics of the magnetoelastic coupling deformation of a giant magnetostrictive rod.

关键词： magnetostrictive deformation magnetomechanical coupling constitituve model

The Effect of Atomic Vacancies and Grain Boundaries on Mechanical Properties of GaN Nanowires

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Chinese Physics Letters 2011年第6期28卷 214-217页

作者：谢世峰陈尚达苏爱嘉 Faculty of Materials Optoelectronics and PhysicsXiangtan UniversityHunan 411105 Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong KongChina

Molecular dynamics simulations are carried out to investigate the influences of various defects on mechanical properties of wurtzite GaN nanowires by adopting the empirical Stillinger-Weber *** types of vacancies and grain boundaries are considered and the uniaxial loading condition is implemented along the[001]*** is found that surface defects have less impact on Young's moduli and critical stresses of GaN nanowires compared with random *** grain boundary normal to the axial direction of a nanowire would not significantly affect Young's moduli of ***,the inversion domain grain boundaries with and without wrong bonds would significantly lower Young's moduli of GaN *** addition,the inversion domain grain boundary affects the critical stress of GaN nanowires more than the grain boundary with interface normal to the axial direction of the nanowire.

关键词： nanowires grain boundary

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薄膜铌酸锂切趾啁啾光栅研究

光子学报 2024年第8期53卷 80-90页

作者：隆嘉轩吴侃蔡明璐张栩嘉陈建平上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200240

本文研究了基于薄膜铌酸锂的啁啾光栅性能,采用仿真分析的方法,研究了不同设计参数下,三种光栅切趾方式对称线性切趾、非对称线性切趾和高斯切趾在反射带宽和群延迟色散上的差异。通过最优化设计,在高斯切趾的啁啾光栅下,实现了3 dB带宽... 详细信息

本文研究了基于薄膜铌酸锂的啁啾光栅性能,采用仿真分析的方法,研究了不同设计参数下,三种光栅切趾方式对称线性切趾、非对称线性切趾和高斯切趾在反射带宽和群延迟色散上的差异。通过最优化设计,在高斯切趾的啁啾光栅下,实现了3 dB带宽21.2 nm、群延迟色散值0.1385 ps/nm的啁啾光栅。本工作将为实现薄膜铌酸锂片上色散补偿和光信号处理奠定基础。

关键词：啁啾光栅切趾绝缘体上铌酸锂色散补偿群延迟

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健全全面从严治党体系的系统路径

理论探索 2024年第1期 50-56页

作者：杜悦嘉中共广东省委党校/广东行政学院广州510030

党的二十大报告提出“健全全面从严治党体系”的重大命题,并将其作为新征程上关乎党的建设全局性与开创性的工作部署。新增“体系”二字,旨在着力解决党的建设过程中系统性、整体性问题。为此,应当在实践中紧紧围绕健全以“坚持和加强... 详细信息

党的二十大报告提出“健全全面从严治党体系”的重大命题,并将其作为新征程上关乎党的建设全局性与开创性的工作部署。新增“体系”二字,旨在着力解决党的建设过程中系统性、整体性问题。为此,应当在实践中紧紧围绕健全以“坚持和加强党中央集中统一领导”为根本的核心体系、以“党的自我革命永远在路上”为主线的目标体系、以“建设堪当民族复兴重任的高素质干部队伍”为导向的管理体系、以完善党内法规为依据的制度体系和以深化巡视监督为重点的治理体系等主要路向展开,从而不断推动全面从严治党各项工作更好体现时代性、把握规律性、富于创造性。

关键词：中国共产党全面从严治党体系系统路径

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爆炸荷载作用下钢梁动力响应的相似分析方法

建筑结构学报 2024年第1期45卷 27-35页

作者：刘思嘉陈力冯彬东南大学爆炸安全防护教育部工程研究中心江苏南京211189 华南理工大学亚热带建筑科学国家重点实验室广东广州510640

在通过化学爆炸模拟核爆炸加载的缩尺结构抗爆试验中,为使结构变形满足几何相似,需设计约束和封闭等特殊方案来提高化学爆炸荷载作用时间,显著增加了缩尺结构试验的成本和难度,且缩尺比例越小,误差越大。为解决该问题,提出一种爆炸荷载... 详细信息

在通过化学爆炸模拟核爆炸加载的缩尺结构抗爆试验中,为使结构变形满足几何相似,需设计约束和封闭等特殊方案来提高化学爆炸荷载作用时间,显著增加了缩尺结构试验的成本和难度,且缩尺比例越小,误差越大。为解决该问题,提出一种爆炸荷载作用下钢梁动力响应的相似分析方法,并通过数值计算验证了该方法的准确性。结果表明:在弹性响应阶段,若要使钢梁跨中最大变形满足几何相似,则需要模型与原型材料相同且几何形状相似,化学爆炸加载模型与核爆炸加载原型结构的等效静载相同;在塑性响应阶段,钢梁跨中最大变形无法满足几何相似,仅在缩尺模型化学爆炸荷载持时长于一最小作用时间的情况下,可通过几何相似系数与延性比系数的乘积来表示模型和原型的变形相似关系,并给出了延性比系数的解析表达式。

关键词：钢梁爆炸荷载相似分析动力响应等效静载延性比系数

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功能铁磁材料的变形与断裂的研究进展

力学进展 2006年第4期36卷 485-506页

作者：方岱宁万永平冯雪裴永茂梁伟仲政苏爱嘉黄克智清华大学工程力学系北京100084 同济大学航空航天与力学学院上海200092 香港大学机械工程系

综述了近几十年,特别是近十几年来铁磁材料的力磁耦合变形与断裂行为的研究概况,传统铁磁弹性问题的研究已经有较长时间的积累,文献中已有大量的研究结果发表,近些年来,随着智能材料及结构应用与研究的兴起,功能铁磁材料如稀土超磁致伸... 详细信息

综述了近几十年,特别是近十几年来铁磁材料的力磁耦合变形与断裂行为的研究概况,传统铁磁弹性问题的研究已经有较长时间的积累,文献中已有大量的研究结果发表,近些年来,随着智能材料及结构应用与研究的兴起,功能铁磁材料如稀土超磁致伸缩材料、铁磁相变材料以及铁磁复合材料等的力学行为越来越受到重视,人们在功能铁磁材料的变形与断裂以及铁磁复合材料的有效性质等方面开展了大量的研究工作,本文在简单介绍了经典铁磁弹性和传统铁磁结构的力磁性能的研究背景基础上,结合作者近年来在铁磁材料变形与断裂方面所开展的工作,着重评述了功能软铁磁材料在变形与断裂的实验研究,如实验设备和技术,以及铁磁复合材料细观力学、软铁磁材料、铁磁功能材料的变形与断裂理论等方面的研究进展,并指出了需要进一步研究的方向。

关键词：力磁耦合变形断裂复合材料磁弹实验