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论文类型：期刊论文

发表时间：2019-01-01

发表刊物：KSCE JOURNAL OF CIVIL ENGINEERING

收录刊物：SCIE、Scopus

卷号：23

期号：1

页面范围：120-129

ISSN号：1226-7988

关键字：non-spherical particle; nonlinear optimization; minimal bounding box; shape factors; PFC3D

摘要：The angularity of particles has important effects on the mechanical properties of asphalt mixture and other granular materials. To simulate these effects, the glue-sphere method was usually used to create an arbitrary polyhedron particle. Unlike other studies, this paper aims to efficiently fill a polyhedron with as few spheres as possible through optimization technology in order to reduce the cost of calculation during mixture simulation. Four contents are mainly discussed here: a) how to produce non-spherical aggregates and control their sizes with the minimal bounding box; b) how to fill convex non-spherical particles with the fewest balls as possible using the constrained nonlinear optimization method; c) how to compute the typical shape factors of these particles; and d) how the control parameters affect the filling effect. The algorithm for this study was programmed by MATLAB software and was proven to have better filling performance and less computational cost compared to other methods.