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Thermal-induced interfacial behavior of a thin one-dimensional hexagonal quasicrystal film

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Applied Mathematics and Mechanics(English Edition) 2023年第5期44卷 841-856页

作者： huayang dang Dongpei QI Minghao ZHAO Cuiying FAN C.S.LU School of Mechanics and Safety Engineering Zhengzhou UniversityZhengzhou 450001China School of Mechanical Engineering Zhengzhou UniversityZhengzhou 450001China School of Civil and Mechanical Engineering Curtin UniversityWestern Australia 6845Australia

In this paper,we investigate the interfacial behavior of a thin one-dimensional(1D)hexagonal quasicrystal(QC)film bonded on an elastic substrate subjected to a mismatch strain due to thermal variation.The contact interface is assumed to be nonslipping,with both perfectly bonded and debonded boundary conditions.The Fourier transform technique is adopted to establish the integral equations in terms of interfacial shear stress,which are solved as a linear algebraic system by approximating the unknown phonon interfacial shear stress via the series expansion of the Chebyshev polynomials.The expressions are explicitly obtained for the phonon interfacial shear stress,internal normal stress,and stress intensity factors(SIFs).Finally,based on numerical calculations,we briefly discuss the effects of the material mismatch,the geometry of the QC film,and the debonded length and location on stresses and SIFs.

关键词： one-dimensional(1D)hexagonal quasicrystal(QC)film stress intensity factor(SIF) thermal variation Chebyshev polynomial interfacial behavior

Dielectric Breakdown Model for an Electrically Semi-Permeable Penny-Shaped Crack in Three-Dimensional Piezoelectric Media

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Acta Mechanica Solida Sinica 2016年第5期29卷 536-546页

作者： Minghao Zhao huayang dang Guangtao Xu Cuiying Fan Henan Key Engineering Laboratory for Anti-fatigue Manufacturing Technology and School of Mechanical Engineering Zhengzhou University School of Mechanics & Engineering Science Zhengzhou University

The dielectric breakdown（DB） model for a penny-shaped crack under a semipermeable boundary condition in a three-dimensional piezoelectric medium is studied.An approximate analytical solution is derived by using the boundary integral equation with extended displacement discontinuity,and the corresponding boundary element method with double iterative approaches is developed to analyze the semi-permeable crack.The effect of electric boundary conditions on crack faces is discussed on the basis of DB model.By comparing the DB model with the polarization saturation（PS） model for different piezoelectric materials,some interesting phenomena related to the electric yielding zone and local J-integral are observed.

关键词： piezoelectric iterative discontinuity approximate dielectric normalized breakdown saturation permeable coordinates

Interfacial fracture analysis for a two-dimensional decagonal quasi-crystal coating layer structure

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Applied Mathematics and Mechanics(English Edition) 2021年第11期42卷 1633-1648页

作者： Minghao ZHAO Cuiying FAN C.S.LU huayang dang School of Mechanics and Safety Engineering Zhengzhou UniversityZhengzhou 450001China School of Mechanical Engineering Zhengzhou UniversityZhengzhou 450001China School of Civil and Mechanical Engineering Curtin UniversityWestern Australia 6845Australia

The interface crack problems in the two-dimensional(2D)decagonal quasicrystal(QC)coating are theoretically and numerically investigated with a displacement discontinuity method.The 2D general solution is obtained based on the potential theory.An analogy method is proposed based on the relationship between the general solutions for 2D decagonal and one-dimensional(1D)hexagonal QCs.According to the analogy method,the fundamental solutions of concentrated point phonon displacement discontinuities are obtained on the interface.By using the superposition principle,the hypersingular boundary integral-differential equations in terms of displacement discontinuities are determined for a line interface crack.Further,Green’s functions are found for uniform displacement discontinuities on a line element.The oscillatory singularity near a crack tip is eliminated by adopting the Gaussian distribution to approximate the delta function.The stress intensity factors(SIFs)with ordinary singularity and the energy release rate(ERR)are derived.Finally,a boundary element method is put forward to investigate the effects of different factors on the fracture.

关键词： two-dimensional(2D)decagonal quasi-crystal(QC)coating interface crack analogy method displacement discontinuity stress intensity factor(SIF) energy release rate(ERR)

基于CORS站的中国大陆地区大气负荷形变特征研究

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中国矿业大学学报 2020年第2期49卷 395-402页

作者：岳彩亚党亚民许长辉谷守周戴华阳中国矿业大学(北京)地球科学与测绘工程学院北京100083 中国测绘科学研究院北京100830 山东科技大学测绘科学与工程学院山东青岛266590

基于月值的大气压变化的球谐函数模型和全球卫星导航系统(GNSS)基准站实测数据,提出了一种数据处理策略,并建立了一种大气压变化与地壳形变相关性模型.基于此,对中国大陆地区大气负荷的形变特征和变化规律进行了研究.分析了中国大陆地... 详细信息

基于月值的大气压变化的球谐函数模型和全球卫星导航系统(GNSS)基准站实测数据,提出了一种数据处理策略,并建立了一种大气压变化与地壳形变相关性模型.基于此,对中国大陆地区大气负荷的形变特征和变化规律进行了研究.分析了中国大陆地区大气荷载响应特征,可知大气质量变化主要影响我国的西北地区、华东东北部、华北东部,量级可达20 mm左右,其次是东北地区和华北北部,量级约为13 mm左右.对不同区域GNSS基准站垂向序列进行大气荷载修正,发现西北干旱地区主要受大气负荷形变影响,经大气负荷修正后的振幅波动较为平滑;而川滇和青藏高原地区在修正后振幅变大,表明此区域受构造运动和水迁徙负荷影响较为严重.基于GNSS台站进行了大气压变化与地壳形变相关性分析,可知当大气荷载同等变化时,华中地区、川滇地区和华东北部靠近沿海地区产生形变程度较大.

关键词：大气负荷形变球谐函数基准站时序地壳形变

电离层高阶项改正对GNSS基准站分布的影响

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测绘科学 2018年第9期43卷 16-21页

作者：岳彩亚党亚民戴华阳王虎杨强韩雪丽中国矿业大学(北京) 北京100083 中国测绘科学研究院北京100830 山东科技大学山东青岛266590

针对电离层高阶项的原理和影响因素的问题,该文分两种方案解算和平差了2012年的陆态网络数据,将解算出的坐标值进行作差并根据差值的区间进行分类提取。结果表明:影响电离层高阶项的主要因素为地理纬度,与测站所处的地势情况几乎无关连... 详细信息

针对电离层高阶项的原理和影响因素的问题,该文分两种方案解算和平差了2012年的陆态网络数据,将解算出的坐标值进行作差并根据差值的区间进行分类提取。结果表明:影响电离层高阶项的主要因素为地理纬度,与测站所处的地势情况几乎无关连;是否加入电离层高阶项对我国25°N以下的省份影响较大,特别是广东、广西、海南等省,高程方向最大影响可达厘米级;且呈现由南往北影响逐渐递减的趋势,在东北地区影响均在1mm以下。为各省GNSS基准站在使用过程中是否加入电离层高阶项改正提供了理论支持和参考作用。

关键词：电离层高阶项地理纬度基线解算地势

皖江城市带承接产业转移示范区信息资源共享模式研究

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中国科技资源导刊 2012年第2期44卷 7-11页

作者：徐华洋金传萍李蓉梅江树青党兴华安徽建筑工业学院图书馆安徽合肥230022

针对皖江城市带承接产业转移示范区“一轴双核两翼”的产业格局及产业集聚区和产业园区建设现状，建设“行业共建，区域共享”的区域信息共享体系，运用云计算IaaS、PaaS、SaaS，从平台构建、内容构建、应用服务三方面构建区域信息资源... 详细信息

针对皖江城市带承接产业转移示范区“一轴双核两翼”的产业格局及产业集聚区和产业园区建设现状，建设“行业共建，区域共享”的区域信息共享体系，运用云计算IaaS、PaaS、SaaS，从平台构建、内容构建、应用服务三方面构建区域信息资源共享模式。最后简要总结皖江城市带承接产业转移示范区信息资源共享模式构建的经验与启示。

关键词：皖江城市带产业转移信息资源信息共享共享模式