水力发电学报2025，Vol.44Issue(8)：81-92,12.DOI:10.11660/slfdxb.20250808
球形颗粒应力解析与起裂快速评估:从单体到堆积体
Stress analysis and rapid crack assessment of spherical particles:From mono-particle to multi-particle systems
摘要
Abstract
Granular materials are widely used in engineering applications,where their internal stress distribution and fracture behavior greatly influence the stability and safety of structures such as rockfill dams and roadbeds.This study investigates the internal stress distributions and crack initiation mechanisms of spherical particles under uniaxial compression based on two analytical solutions:the Hiramatsu-Oka(HO)solution,and the Dean-Sneddon-Parsons(DSP)solution.The results indicate loading range significantly influences internal stress distribution and crack initiation location.Stress distributions obtained from both solutions are highly consistent,while the DSP solution offers superior extensibility.We further extend the DSP solution to multi-point loading conditions,and develop a rapid evaluation framework for stress distribution and crack initiation in granular assemblies based on an approach of coupling the scaled boundary finite element method(SBFEM)and DSP.This framework efficiently determines contact force distributions in granular assemblies using SBFEM,and applies the stress superposition principle of the DSP solution to achieve a rapid assessment of stress fields and crack initiation zones.The findings lay a theoretical foundation for understanding stress distribution and fracture mechanism in granular materials,and they could be further applied to rapid evaluation of the deformation and potential breakage rates in granular assemblies.关键词
颗粒破碎/解析解/应力分布/颗粒堆积体/比例边界有限元Key words
particle breakage/analytical solution/stress distribution/particle assembly/SBFEM分类
建筑与水利引用本文复制引用
江汇,苑耀云,周元德,王进廷,张宪可,杜修力..球形颗粒应力解析与起裂快速评估:从单体到堆积体[J].水力发电学报,2025,44(8):81-92,12.基金项目
国家自然科学基金(52479114 （）
42107161) （）
