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Applied Mathematics and Mechanics(English Edition) 2015年第4期36卷 417-426页

作者： Bo YANG Weiqiu CHEN hao jiang ding Department of Civil Engineering Zhejiang Sci-Tech University Department of Engineering Mechanics Zhejiang University Department of Civil Engineering Zhejiang University

Based on the generalized England-Spencer plate theory, the equilibrium of a transversely isotropic functionally graded plate containing an elastic inclusion is studied. The general solutions of the governing equations are expressed by four analytic functions α（ζ）, β（ζ）, φ（ζ）, and ψ（ζ） when no transverse forces are acting on the surfaces of the plate. Axisymmetric problems of a functionally graded circular plate and an infinite func- tionally graded plate containing a circular hole subject to loads applied on the cylindrical boundaries of the plate are firstly investigated. On this basis, the three-dimensional （3D） elasticity solutions are then obtained for a functionally graded infinite plate containing an elastic circular inclusion. When the material is degenerated into the homogeneous one, the present elasticity solutions are exactly the same as the ones obtained based on the plane stress elasticity, thus validating the present analysis in a certain sense.

关键词： functionally graded plate elastic circular inclusion elasticity solution

Analytical solution for 1D consolidation of unsaturated soil with mixed boundary condition

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第1期14卷 61-70页

作者： Zhen-dong SHAN Dao-sheng LING hao-jiang ding MOE Key Lab of Soft Soils and Geo-environmental Engineering Zhejiang University Institute of Engineering Mechanics China Earthquake Administration

Based on consolidation equations proposed for unsaturated soil, an analytical solution for 1D consolidation of an unsaturated single-layer soil with nonhomogeneous mixed boundary condition is developed. The mixed boundary condition can be used for special applications, such as tests occur in laboratory. The analytical solution is obtained by assuming all material parameters remain constant during consolidation. In the derivation of the analytical solution, the nonhomogeneous boundary condition is first transformed into a homogeneous boundary condition. Then, the eigenfunction and eigenvalue are derived according to the consolidation equations and the new boundary condition. Finally, using the method of undetermined coefficients and the orthogonal relation of the eigenfunction, the analytical solution for the new boundary condition is obtained. The present method is applicable to various types of boundary conditions. Several numerical examples are provided to investigate the consolidation behavior of an unsaturated single-layer soil with mixed boundary condition.

关键词： Unsaturated soil Consolidation Mixed boundary condition Analytical solution

Modeling of sensor function for piezoelectric bender elements

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 1-7页

作者： Yan-guo ZHOU Yun-min CHEN hao-jiang ding Wei-qiu CHEN Key Laboratory of Soft Soils and Geoenvironmental Engineering Ministry of Education Zhejiang University Hangzhou 310027 China

An analytical sandwich beam model for piezoelectric bender elements is derived based on the first-order shear deformation theory (FSDT), which assumes a single rotation angle for the whole cross-section and a quadratic distribution for coupled electric potential in piezoelectric layers. Shear coefficient is introduced to correct the effect of transverse shear strain on shear force and the electric displacement integration. Static and free vibration analyses of simply-supported bender elements are carried out for the sensor function. The results illustrate the high accuracy of the present model compared with the exact 2D solutions.

关键词： Bender elements Piezoelectric Sensor Sandwich beam Shear coefficient

Electrode/Electrolyte Optimization‑Induced Double‑Layered Architecture for High‑Performance Aqueous Zinc‑(Dual)Halogen Batteries

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Nano-Micro Letters 2025年第3期17卷 121-137页

作者： Chengwang Zhou Zhezheng ding Shengzhe Ying hao jiang Yan Wang Timing Fang You Zhang Bing Sun Xiao Tang Xiaomin Liu School of Textiles and Clothing School of Chemistry and Chemical EngineeringQingdao UniversityQingdao 266071ShandongPeople’s Republic of China Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneyUltimoNSW 2007Australia School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007HenanPeople’s Republic of China

Aqueous zinc-halogen batteries are promising candidates for large-scale energy storage due to their abundant resources,intrinsic safety,and high theoretical ***,the uncontrollable zinc dendrite growth and spontaneous shuttle effect of active species have prohibited their practical ***,a double-layered protective film based on zinc-ethylenediamine tetramethylene phosphonic acid(ZEA)artificial film and ZnF2-rich solid electrolyte interphase(SEI)layer has been successfully fabricated on the zinc metal anode via electrode/electrolyte synergistic *** ZEA-based artificial film shows strong affinity for the ZnF2-rich SEI layer,therefore effectively suppressing the SEI breakage and facilitating the construction of double-layered protective film on the zinc metal *** double-layered architecture not only modulates Zn2+flux and suppresses the zinc dendrite growth,but also blocks the direct contact between the metal anode and electrolyte,thus mitigating the corrosion from the active *** employing optimized metal anodes and electrolytes,the as-developed zinc-(dual)halogen batteries present high areal capacity and satisfactory cycling *** work provides a new avenue for developing aqueous zinc-(dual)halogen batteries.

关键词： Zn metal anodes Double-layered protective film Electrode/electrolyte optimization Aqueous zinc-(dual)halogen batteries

ANALYTICAL SOLUTIONS FOR AXISYMMETRIC BENding OF FUNCTIONALLY GRADED PIEZOELECTRIC ANNULAR PLATES

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ANALYTICAL SOLUTIONS FOR AXISYMMETRIC BENDING OF FUNCTIONALL...

Ultra‑High Sensitivity Anisotropic Piezoelectric Sensors for Structural Health Monitoring and Robotic Perception

2013全国压电和声波理论及器件技术研讨会

作者： Yun WANG hao-jiang ding Rong-qiao XU School of Mechanical Engineering Hangzhou Dianzi University Department of Civil Engineering Zhejiang University

The bending of piezoelectric annular plates is the classic problem in theory of piezoelectric *** solution of axisymmetric bending of FGPM annular plates subject to arbitrarily transverse loads is not available in the literatures though some solutions for special loads have been *** this purpose,this paper analytically studies the axisymmetric bending of functionally graded piezoelectric annular plates subjected to arbitrary transverse *** on the three-dimensional theory of piezoelectricity,this work derives analytical solutions for the axisymmetric bending of piezoelectric annular *** transverse loads are expanded in terms of the Fourier-Bessel series,and the solutions corresponding to each item of the series are obtained by the semi-inverse *** total solutions are then obtained through the superposition *** present solutions rigorously satisfies the governing equations when the material properties obey the exponential law along the thickness of the *** boundary conditions on the top and bottom surfaces are completely satisfied while the boundary conditions at the circumferential edges are approximately satisfied based on Saint-Venant’s principle.

关键词： Axisymmetric bending Annular plates Functionally graded materials Piezoelectricity

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Nano-Micro Letters 2025年第2期17卷 432-446页

作者： hao Yin Yanting Li Zhiying Tian Qichao Li Chenhui jiang Enfu Liang Yiping Guo State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Beijing Vacuum Electronics Research Institute Beijing 100015People’s Republic of China Fundamental Science On Vibration Shock and Noise LaboratoryState Key Laboratory of Mechanical System and VibrationSchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Monitoring minuscule mechanical signals,both in magnitude and direction,is imperative in many application scenarios,e.g.,structural health monitoring and robotic sensing ***,the piezoelectric sensor struggles to satisfy the requirements for directional recognition due to the limited piezoelectric coefficient matrix,and achieving sensitivity for detecting micrometer-scale deformations is also ***,we develop a vector sensor composed of lead zirconate titanate-electronic grade glass fiber composite filaments with oriented arrangement,capable of detecting minute anisotropic *** as-prepared vector sensor can identify the deformation directions even when subjected to an unprecedented nominal strain of 0.06%,thereby enabling its utility in accurately discerning the 5μm-height wrinkles in thin films and in monitoring human pulse *** ultra-high sensitivity is attributed to the formation of porous ferroelectret and the efficient load transfer efficiency of continuous lead zirconate titanate ***,when integrated with machine learning techniques,the sensor’s capability to recognize multi-signals enables it to differentiate between 10 types of fine textures with 100%*** structural design in piezoelectric devices enables a more comprehensive perception of mechanical stimuli,offering a novel perspective for enhancing recognition accuracy.

关键词： Flexible piezoelectric filaments Anisotropic Ultra-high sensitivity Structural health detection Texture recognition

DETERMINATION OF TRANSIENT DYNAMIC PRESSURE BY PIEZOELECTRIC SENSOR

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DETERMINATION OF TRANSIENT DYNAMIC PRESSURE BY PIEZOELECTRIC...

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

第三届全国压电和声波理论及器件技术研讨会

作者： Hui-ming WANG Department of Mechanics,Zhejiang University,Hangzhou,Zhejiang 310027,China hao-jiang ding Department of Civil Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China

The piezoelectric hollow sphere sensor is analyzed theoretically to predict the dynamic pressure with the knowledge of electric potential difference between the internal and external *** analysis is based on the three-dimensional theory of spherically isotropic piezoelectricity and is suitable for the piezoelectric hollow sphere sensor with arbitrary *** the free electric charge boundary condition,the relation between the dynamic pressure and the measured electric potential difference is derived as a second kind Volterra integral equation by means of the separation of variables *** dynamic pressure is determined by solving the integral equation.

关键词： Piezoelectric sensor hollow sphere dynamic pressure Volterra integral equation

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun jiang Zhenjie Lu Yanwen ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility

FREE AXISYMMETRIC VIBRATIONS OF FGM CIRCULAR PLATES

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FREE AXISYMMETRIC VIBRATIONS OF FGM CIRCULAR PLATES

A newly unraveled 13.6-year oscillation from GPS displacements and its potential implications for the dynamic reference frame

第三届全国压电和声波理论及器件技术研讨会

作者： Yun WANG School of Mechanical Engineering,Hangzhou Dianzi University,Hangzhou,Zhejiang 310018,China Rong-qiao XU,hao-jiang ding Department of Civil Engineering,Zhejiang University,Hangzhou,Zhejiang 310058,China

This work presents an approach named direct displacement method to investigate the free axisymmetric vibrations of transversely isotropic FGM circular plates whose material properties can be varied arbitrarily along the thickness of the *** the variation of the material properties obeys the exponential law,three-dimensionally exact solutions are obtained for two specific boundary conditions,which rigorously satisfy the governing equations and boundary conditions at every ***,semi-analytical solutions are obtained for arbitrary variation of material properties. Numerical examples are finally shown to demonstrate the present method.

关键词： FGM circular plate free vibration

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Science China Earth Sciences 2024年第10期67卷 3204-3212页

作者： hao ding Weiping jiang School of Geodesy and Geomatics Hubei Luojia LaboratoryWuhan UniversityWuhan 430079China GNSS Research Center Wuhan UniversityWuhan 430079China

Numerous practical geodetic and geophysical applications necessitate precise measurements of GNSS displacements at the millimeter or sub-millimeter level. To attain such precision, it is imperative to identify and analyze the unidentified decadal signals inherent in the GPS displacements. In this research, we employ the optimal sequence estimation method to effectively detect an about 13.6-year oscillational signal with an excited amplitude of 3.6±1.2 mm in the U-components of the GPS displacements. It is noteworthy that this signal demonstrates a consistent spatial pattern characterized by the spherical harmonic Y_(2,-2). We conduct a comparative analysis with the 13.6-year oscillation observed in length-of-day variations(and geomagnetic records), finding that they are in reverse phase. After eliminating the Earth's external excitation sources through the utilization of two distinct in-situ hydrological records, we suggest that the 13.6-year GPS signal may come from the internal motions within the Earth. However, the specific excitation source and the detailed physical mechanism remain uncertain. Additionally, we develop a mathematical displacement model to explain the 13.6-year signal. Our findings indicate that this signal can result in displacements of up to 1.37 mm and velocity effects of 0.63 mm/yr(for U-component) at maximum. These results underscore the necessity of incorporating this 13.6-year signal into the construction and maintenance of a dynamic reference frame at the millimeter level.

关键词： GPS displacements Decadal changes 13.6-year oscillation Displacement model Dynamic reference frame