海南大学学报（自然科学版）2025，Vol.43Issue(2)：146-153,8.DOI:10.15886/j.cnki.hdxbzkb.2024030901
离散元双球模型建模及脆性断裂模拟
Modeling and simulation of brittle fracture in Discrete Element double-sphere models
摘要
Abstract
To improve the accuracy of displacement field computations in the Discrete Element Method(DEM),this study proposes a dual-sphere model from the perspectives of arrangement modeling and force transmission.To validate the accuracy and applicability of the dual-sphere model,this research investigates the displacement field of a perforated plate.By comparing the results of DEM simulations with finite element analysis,it is found that the maximum relative errors of displacement fields in four directions along three cutting lines are 11.5％,4.6％,4.1％,and 0.1％,respectively,validating the accuracy of the dual-sphere model.Subsequently,the dual-sphere model is utilized to simulate Brazilian splitting tests and three-point notched fracture tests,demonstrating that its fracture behavior and force-displacement curves closely match experimental results,thereby confirming the accuracy and applicability of the dual-sphere model.This study provides new methods and perspectives for a deeper understanding of fracture behavior.关键词
离散元/位移场/双球模型/弹性行为/断裂行为Key words
Discrete Element Method/displacement field/dual-sphere model/elastic behavior/fracture behavior分类
数理科学引用本文复制引用
刘显阳,王群伟,王永卫,董勤喜..离散元双球模型建模及脆性断裂模拟[J].海南大学学报（自然科学版）,2025,43(2):146-153,8.基金项目
海南省自然科学基金青年基金项目(521QN204) （521QN204）
海南省院士创新平台科研项目(YSPTZX202106) （YSPTZX202106）
