华中科技大学学报（自然科学版）2026，Vol.54Issue(8)：12-19,30,9.DOI:10.13245/j.hust.250534
原生裂纹对岩石疲劳损伤演化的影响研究
Influence of pre-existing cracks on the evolution of rock fatigue damage
摘要
Abstract
To elucidate the influence of pre-existing cracks on the damage evolution of rocks under combined pre-static and cyclic disturbance loads,the geometric parameters of pre-existing cracks in granite and marble were obtained through scanning electron microscope(SEM)observations.Numerical models incorporating the actual crack distribution were constructed based on the discrete fracture network(DFN)method.The influence of pre-existing cracks on rock fatigue damage was systematically analyzed,and the evolution mechanism of micro-cracks was revealed.The results indicate that under combined pre-static and cyclic loads,pre-existing cracks significantly reduce the tensile strength and maximum axial deformation of rocks.When the influence of pre-existing cracks is considered,the total number of tensile and shear cracks increases significantly.For granite,the total number of cracks increases by approximately 30％,while for marble,the increment is about 25％.Furthermore,under combined loads,the Brazilian splitting failure of granite is primarily caused by transgranular cracks,and the presence of pre-existing cracks increases the proportion of intergranular cracks.关键词
预静载与循环扰动荷载/细观结构特征/原生裂纹/离散裂隙网络方法/裂纹演化规律Key words
pre-static and cyclic disturbance loads/meso-structural characteristics/pre-existing crack/discrete fracture network method/crack evolution mechanism分类
建筑与水利引用本文复制引用
刘宝壮,张正虎,梁正召..原生裂纹对岩石疲劳损伤演化的影响研究[J].华中科技大学学报（自然科学版）,2026,54(8):12-19,30,9.基金项目
国家自然科学基金面上资助项目(42577177) （42577177）
地球深部探测与矿产资源勘查国家科技重大专项(2024ZD1000406). （2024ZD1000406）
