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STATISTIC MODELING OF THE CREEP BEHAVIOR OF METAL MATRIX COMPOSITES BASED ON FINITE ELEMENT ANALYSIS
作者姓名:岳珠峰
作者单位:YUE Zhu-feng (1 Department of Applied Mechanics,Northwestern Polytechnical University,Xi'an 710072,P R China; 2 Institute of Materials,Ruhr University,44780 Bochum,Germany) (Communicated by ZHOU Cheng-ti)
基金项目:theNationalNaturalScienceFoundationofChina( 50 0 0 50 1 6)
摘    要:IntroductionThecreepbehaviorofshortfiberreinforceMetalMatrixComposites (MMCs)dependsonthefollowingfactors,suchasthecreeppropertyofthematrix ,elasticandfracturespropertiesofthefiber,geometricparametersofthefibers,arrangementofthefibersandthepropertyofthef…

收稿时间:10 October 2000

Statistic modeling of the creep behavior of metal matrix composites based on finite element analysis
Yue Zhu-feng Professor, Doctor.STATISTIC MODELING OF THE CREEP BEHAVIOR OF METAL MATRIX COMPOSITES BASED ON FINITE ELEMENT ANALYSIS[J].Applied Mathematics and Mechanics(English Edition),2002,23(4):421-434.
Authors:Yue Zhu-feng Professor  Doctor
Institution:Department of Applied Mechanics, Northwestern Polytechnical University, Xi'an 710072, P R China; Institute of Materials, Ruhr University, 44780 Bochum, Germany
Abstract:The aim of the paper is to discover the general creep mechanisms for the short fiber reinforcement matrix composites (MMCs) under uniaxial stress states and to build a relationship between the macroscopic steady creep behavior and the material micro geometric parameters. The unit cell models were used to calculate the macroscopic creep behavior with different micro geometric parameters of fibers on different loading directions. The influence of the geometric parameters of the fibers and loading directions on the macroscopic creep behavior had been obtained, and described quantitatively. The matrix/fiber interface had been considered by a third layer, matrix/fiber interlayer, in the unit cells with different creep properties and thickness. Based on the numerical results of the unit cell models, a statistic model had been presented for the plane randomly-distributed-fiber MMCs. The fiber breakage had been taken into account in the statistic model for it starts experimentally early in the creep life. With the distribution of the geometric parameters of the fibers, the results of the statistic model agree well with the experiments. With the statistic model, the influence of the geometric parameters and the breakage of the fibers as well as the properties and thickness of the interlayer on the macroscopic steady creep rate have been discussed.
Keywords:unit cell model  finite element method  MMCs  creep behavior  breakage of fiber  statistic model  fiber parameters and distribution
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