Compaction of powders containing hard inclusions: experiments and micromechanical modeling

被引：22

作者：

Bonnenfant, D ^{[1
]}

Mazerolle, F ^{[1
]}

Suquet, P ^{[1
]}

机构：

[1] CNRS, LMA, F-13402 Marseille 20, France

来源：

MECHANICS OF MATERIALS | 1998年 / 29卷 / 02期

关键词：

powder compaction; metal-matrix composites; nonlinear effective properties; computed tomography;

D O I：

10.1016/S0167-6636(97)00071-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of reinforcements in powders during hot compaction is studied with the help of model materials. The matrix is a polymethylmethacrylate (PMMA), which exhibits a nonlinear viscoplastic behavior at 110 degrees C. The inclusions are spheres of glass with different sizes. The samples an compacted in a triaxial cell. In situ measurements of density variations are made with an X-ray tomograph which allows, in addition, continuous measuring of the diameter of the samples. Different volume fractions and sizes of inclusions are considered. The experiments are modeled by means of a micromechanical procedure based on recently proposed nonlinear variational procedures. An original multi-scale scheme is proposed to account for the relative size of the inclusions compared to the particles of matrix. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：93 / 109

页数：17

共 31 条

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