岩土力学2024，Vol.45Issue(7)：1967-1975,9.DOI:10.16285/j.rsm.2023.1297
基于体积变化的珊瑚砂砾破碎率研究
Breaking rate of coral sand and gravel based on volume change
摘要
Abstract
The breakage behavior of granular materials is prevalent across various fields and significantly impacts the mechanical properties of granular materials.A substantial amount of research on particle breakage behavior relies on reasonable calculation methods for breakage rate.This article proposes a calculation method for particle breakage rate based on particle volume as the fundamental parameter,addressing the current limitation of existing methods in accurately evaluating the breakage rate of irregular particles,exemplified by coral gravel.It improves upon the existing Hardin breakage rate calculation formula,which is based on particle size,to better assess the breakage rate of irregular particles.Breakage tests of coral gravel with different shapes were designed and conducted to conduct reliability validation of the aforementioned theoretical formulas,and the causes of errors generated by traditional methods were analyzed.Through experiments,the breakage rate values of particles with different shapes under different pressures and algorithms were obtained.Meanwhile,combining stress,deformation,and image observations from the experimental process,the fragmentation thresholds of coral gravel in three shapes—sheet,block,and rod—were determined,revealing the evolution characteristics of fragmentation modes exhibited by particles with different morphologies during the pressure change process.关键词
颗粒破碎/破碎率/珊瑚砂砾Key words
particle breakage/breakage rate/coral sand分类
建筑与水利引用本文复制引用
王步雪岩,孟庆山,钱建固..基于体积变化的珊瑚砂砾破碎率研究[J].岩土力学,2024,45(7):1967-1975,9.基金项目
中央高校基本科研业务费专项资金(No.2023-2-ZD-08) （No.2023-2-ZD-08）
国家自然科学基金(No.41877267).This work was supported by the Special Fund for Basic Scientific Research Business Expenses of Central Universities(2023-2-ZD-08)and the National Natural Science Foundation of China(41877267). （No.41877267）
