Statistic Modeling of the Creep Behavior of Metal Matrix Composites Based on Finite Element Analysis

YUE Zhu-feng

Article Contents

Article Navigation > Applied Mathematics and Mechanics > 2002 > 23(4): 381-390

YUE Zhu-feng. Statistic Modeling of the Creep Behavior of Metal Matrix Composites Based on Finite Element Analysis[J]. Applied Mathematics and Mechanics, 2002, 23(4): 381-390.

Citation:

YUE Zhu-feng. Statistic Modeling of the Creep Behavior of Metal Matrix Composites Based on Finite Element Analysis[J]. Applied Mathematics and Mechanics, 2002, 23(4): 381-390.

Citation:

YUE Zhu-feng. Statistic Modeling of the Creep Behavior of Metal Matrix Composites Based on Finite Element Analysis[J]. Applied Mathematics and Mechanics, 2002, 23(4): 381-390.

PDF( 391 KB)

Statistic Modeling of the Creep Behavior of Metal Matrix Composites Based on Finite Element Analysis

YUE Zhu-feng^1,2

1.
Department of Applied Mechanics, Northwestern Polytechnical University, Xi'an 710072, P. R. China;
2.
Institute of Materials, Ruhr University, 44780 Bochum, Germany

Received Date: 2000-10-10
Rev Recd Date: 2001-12-21
Publish Date: 2002-04-15

Abstract

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.
- unit cell model,
- finite element method,
- MMCs,
- creep behavior,
- breakage of fiber,
- statistic model,
- fiber parameters and distribution

FullText(HTML)

References(12)

References

[1]	Dragone T L,Nix W D.Geometric affecting the internal stress distribution and high temperature creep rate of discontinuous fiber reinforced methods[J].Acta Metall Mater,1990,38(4):1941-1953.
[2]	Dong M,Schmander S.Transverse mechanical behavior of fiber reinforced composites-FE modeling with embedded cell models[J].Computational Materials Science,1996,5(1):53-66.
[3]	Li J Y,Landon T G.High strain rate superplasticity in metal matrix composites:the role of load tranfer[J].Acta Mater,1998,46(10):3937-3948.
[4]	Tvergaad V.Effects of ductile matrix failure in three dimensional analysis of metal matrix composites[J].Acta Mater,1998,46(9):3637-3648.
[5]	Li Y,Ramesh K T.Influence of particle volume fraction,shape and aspect ratio on the behavior of particle-reinforced metal-matrix composites at high rates of strain[J].Acta Mater,1998,46(10):4033-4046.
[6]	Kelly A,Street K N.Creep of discontinuous fiber composites-Ⅱ:theory for the steady state[J].Proc Royal Soc A,1972,328(2):283-293.
[7]	Johannesson B,Pederson O B.Analytical determination of the average Eshelby tensor for transverely isotropic fiber orientation distributions[J].Acta Mater,1998,46(8):3165-3173.
[8]	Kaustraeter G,Skrotzki B,Eggler G.Creep behavior on AlMg5 and AlZn11 and their fiber reinforced variants[A].In:M Ashby,J Earthman Eds.Proc International Conference Light Alloys and Composites,13-16,May,1999,Zakopanne:Kluwer Academic Publisher,1999,279-285.
[9]	Goto S,McLean M.Role interfaces in creep of fiber-reinforced metal-matrix composites[J].Acta Metall Mater,1991,39(2):153-164,165-177.
[10]	Dlouhy A,Merk N,Eggeler G.A microstructural study of creep in short fiber inforced aluminium alloys[J].Acta Matall Mater,1993,41(8):3245-3256.
[11]	Eggeler G.On the mechanism of creep in short fiber reinforced aluminium alloys[J].Z Metallkd,1994,85(1):39-46.
[12]	Dlouhy A,Eggeler G.Aquantitative metallographic study of a short fiber reinforced aluminium alloy[J].Prakt Metllogr,1993,30(4):172-185.