Computer Simulation of 3-D Random Distribution of Short Fibers in Metal Matrix Composite Materials

[+] Author and Article Information
Jiang Xiaoyu, Kong Xiangan

Institute of Applied Mechanics, Southwestern Jiaotong University, Chengdu, 610031, P. R. China

J. Eng. Mater. Technol 121(3), 386-392 (Jul 01, 1999) (7 pages) doi:10.1115/1.2812391 History: Received November 21, 1997; Revised April 06, 1998; Online November 27, 2007


In this paper, the microstructure of “Saffil”-Al2 O3 short fiber reinforced Al-Mg5.5 metal matrix composite material is simulated by computer. In the simulation it is taken into account of that the lengths, diameters, orientations, and locations of short fibers, etc. For the 3-D randomly distributed short fibers in composite materials, the typical distributions of short fiber microstructures on different planes are obtained for different short fiber volume fractions. The microstructural effects of average fiber length, diameter and their standard deviations on the overall strength of metal matrix composite materials are analyzed. From the short fiber microstructural distribution in metal matrix composite materials, the short fiber diameter coefficient ξd and short fiber length coefficient ξ1 are obtained for different standard deviations σd and σl , respectively. The short fiber orientation coefficient ξa is obtained, also. The results of these coefficients may be useful to the manufacture and use of short fiber reinforced composite materials. Considering these coefficients ξa ξd and ξl , the improved formula is given for the direct calculation of overall strength of short fibers reinforced composite materials. The improved formula may reflect the microstructural characteristics of short fibers reinforced composite materials.

Copyright © 1999 by The American Society of Mechanical Engineers
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