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Modeling of multi-inclusion composites with interfacial imperfections:Micromechanical and numerical simulations

Science china(Technological Sciences) 2010年第3期53卷 720-730页

作者： chen weiqiu 1,zhu xingyi 2 &huang zhiyi 2 1 department of engineering mechanics,yuquan campus,zhejiang university,hangzhou 310027,china 2 Key Laboratory of Soft Soils and Geoenvironmental engineering,Ministry of Education department of Civil engineering,Zijingang campus,zhejiang university,hangzhou 310058,china 1. department of engineering mechanics Yuquan Campus Zhejiang University Hangzhou 310027 China2. Key Laboratory of Soft Soils and Geoenvironmental Engineering Ministry of Education Hangzhou 310058 China3. Department of Civil Engineering Zijingang Campus Zhejiang University Hangzhou 310058 China

A micromechanical approach based on a two-layer built-in model and a numerical simulation based on boundary element method are proposed to predict the effective properties of the multi-inclusion composite with imperfect *** spring model is introduced to simulate the interface *** two methods are compared with each other,and good agreement is *** effects of interface spring stiffness,volume ratio and stiffness of inclusions on the micro-and macro-mechanical behaviors of fiber-reinforced composites are *** is shown that the developed micromechanical method is very comprehensive and efficient for fast prediction of effective properties of composites,while the numerical method is very accurate in detailed modeling of the mechanical behavior of composites with multiple inclusions.

关键词： micromechanics boundary element method interface multi-inclusion composite effective elastic property

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Fast multipole boundary element analysis of 2D viscoelastic composites with imperfect interfaces

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Science china(Technological Sciences) 2010年第8期53卷 2160-2171页

作者： zhu xingyi chen weiqiu huang zhiyi LIU YiJun department of Civil engineering Zhejiang UniversityZijingang CampusHangzhou 310058China department of engineering mechanics Zhejiang UniversityYuquan CampusHangzhou 310027China department of Mechanical engineering University of CincinnatiCincinnatiOhio 45221-0072USA

A fast multipole boundary element method(FMBEM)is developed for the analysis of 2D linear viscoelastic composites with imperfect viscoelastic *** transformed fast multipole formulations are established using the time domain method. To simulate the viscoelastic behavior of imperfect interfaces that are frequently encountered in practice,the Kelvin type model is *** FMBEM is further improved by incorporating naturally the interaction among inclusions as well as eliminating the phenomenon of material *** all the integrals are evaluated analytically,high accuracy and fast convergence of the numerical scheme are *** numerical examples,including planar viscoelastic composites with a single inclusion or randomly distributed multi-inclusions are *** numerical results are compared with the developed analytical solutions,which illustrates that the proposed FMBEM is very efficient in determining the macroscopic viscoelastic behavior of the particle-reinforced composites with the presence of imperfect *** laboratory measurements of the mixture creep compliance of asphalt concrete are also compared with the prediction by the developed model.

关键词： boundary element method fast multipole method viscoelasticity imperfect interface multi-inclusion composite

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维普期刊数据库

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Modeling of multi-inclusion composites with interfacial imperfections: Micromechanical and numerical simulations

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中国科学:技术科学 2010年第2期 219-219页

作者： chen weiqiu1, zhu xingyi2 & huang zhiyi2* 1 department of engineering mechanics, yuquan campus, zhejiang university, hangzhou 310027, china 2 Key Laboratory of Soft Soils and Geoenvironmental engineering, Ministry of Education department of Civil engineering, Zijingang campus, zhejiang university, hangzhou 310058, china

A micromechanical approach based on a two-layer built-in model and a numerical simulation based on boundary element method are proposed to predict the effective properties of the multi-inclusion composite with imperfect interfaces. The spring model is introduced to simulate the interface imperfection. These two methods are compared with each other, and good agreement is achieved. The effects of interface spring stiffness, volume ratio and stiffness of inclusions on the micro- and macro-mechanical behaviors of fiber-reinforced composites are investigated. It is shown that the developed micromechanical method is very comprehensive and efficient for fast prediction of effective properties of composites, while the numerical method is very accurate in detailed modeling of the mechanical behavior of composites with multiple inclusions.

关键词： micromechanics boundary element method interface multi-inclusion composite effective elastic property

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