颗粒离散元法的颗粒碎裂研究进展

ADVANCES IN FRACTURES OF PARTICLES WITH DISTINCT ELEMENT METHOD

颗粒离散元法(distinct element method,DEM)是被不同学科和工程领域广泛应用的方法,各学科结合各自的理论基础和研究范围,对颗粒离散元法进行改进、完善,因此各学科间的发展各有侧重,可进行相互借鉴。本文针对颗粒离散元法中有关"颗粒碎裂"这一基本问题进行介绍,如:颗粒破裂准则、颗粒碎裂与破碎动力学关系、宏观颗粒的发展、块体碰撞损伤与破裂等方面的研究情况,为岩石工程领域的岩石颗粒破碎研究提供参考。同时,对颗粒离散元法的发展概况、DEM基本原理做了简单的介绍,并对我国颗粒离散元法在地质工程、岩土工程领域的研究及应用情况作了简单的评述。

The Distinct Element Method （DEM） is widly used in many disciplines and engineering domain. The DEM is developed and improved based on their theories and research realm. So it is possible that the development directions are different. They can use for reference each other. The basic issue of particle fracture is introduced in this paper. It is about particle fracture criterion, the relation between particle fracture and fracture kinetics, the de- velopment of macroscopic particle and block impact damage and fracture. These research achievements can benefit to and be reference for rock particle fracture investigation. At the same time, the development abstraction of DEM is introduced in the paper. The basic theory of DEM is also simply introduced as an example of PFC. In the end of paper, the drawbacks about this are specified. The situation of DEM study and application in China is simply com- mented in engineering geology and geotechnical engineering.