Computer simulation of random and non-random second-phase distributions in two-phase materials
Pas, Michael E.
McNelley, Terry R.
Kalu, Peter N.
MetadataShow full item record
The mechanical properties of any material with a discontinuous second phase dispersed in a matrix are recognized to be influenced by the distribution of the second-phase particles. Current models for the prediction of material properties from particle distributions are based on the assumption of a random particle distribution. Through computer simulation, nearest-neighbor particle spacings have been calculated for random and non-random distributions. For low fractions, random distributions approach the theoretical spacing predicted from consideration of random, infinitesimal points. For finite sized particles, increasing fraction results in larger spacings than predicted for infinitesimal points. For very high fractions, the spacing approaches that for regular (crystalline) arrays. Also, metal matrix composites initially possess clustered particle distributions. Upon processing, such distributions can be transformed into banded distributions with areas of both high and low density. With sufficient processing, random distributions can be attained. Non-random (banded) distributions were simulated. Sufficient banding results in reduced average particle spacing.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Pas, Michael E. (Monterey, California: Naval Postgraduate School, 1990-12);The mechanical properties of any material with a discontinuous second phase dispersed in a matrix are recognized to be influenced by the distribution of the second-phase particles. Current models for the prediction of ...
Computer simulation of random and non-random second-phase particle distributions for both constant and varying particle size Manfredi, Mark S. (Monterey, California. Naval Postgraduate School, 1992-09);Mechanical properties of two phase materials, such as strength, ductility and toughness, depend on the size and distribution of the second phase. However, no methods are presently available to accurately quantify the ...
Yoshida, Ruriko; Fukumizu, Kenji; Vogiatzis, Chrysafis (ArXiv, 2018-10-08);In order to conduct a statistical analysis on a given set of phylogenetic gene trees, we often use a distance measure between two trees. In a statistical distance-based method to analyze discordance between gene trees, it ...