高压物理学报2025，Vol.39Issue(12)：50-63,14.DOI:10.11858/gywlxb.20251094
早龄期混凝土-泥岩组合体的冲击动力学特性及损伤特征
Impact Dynamic Characteristics and Damage Features of Early-Age Concrete-Mudstone Composite
摘要
Abstract
To investigate the dynamic mechanical properties of early-age concrete-mudstone composites under impact loading,split Hopkinson pressure bar(SHPB)tests integrated with a high-speed camera were conducted on composite specimens with curing ages of 1,3,and 7 d.Digital image correlation(DIC)technology was employed to analyze the evolution of displacement and strain fields,systematically revealing the dynamic damage and failure characteristics of the composites.The test results indicate that as the strain rate increases,the composite specimens exhibit significant strain rate dependence across all curing ages,and their dynamic strength growth follows a logarithmic function model.The energy dissipation density increases linearly with incident energy.DIC measurements show that the maximum surface displacements of the 1,3,and 7 d specimens are 1.564,1.196,and 0.924 mm,respectively,with corresponding maximum strains of 1.886%,1.352%,and 1.184%.This study elucidates the dynamic mechanical behavior and damage-failure mechanisms of early-age concrete-mudstone composites under impact loading,providing a theoretical foundation for damage prevention and control in surrounding rock-initial support structures during tunnel blasting construction.关键词
混凝土-泥岩组合体/早龄期/分离式霍普金森压杆/动力学特性/耗能密度/数字图像相关Key words
concrete-mudstone composite/early-age/split Hopkinson pressure bar(SHPB)/dynamic mechanical properties/dissipated energy density/digital image correlation分类
数理科学引用本文复制引用
潘冲,谢全民,孙金山,周辉,庞朝来,马俊..早龄期混凝土-泥岩组合体的冲击动力学特性及损伤特征[J].高压物理学报,2025,39(12):50-63,14.基金项目
国家自然科学基金(52378399) （52378399）
国家重点研发计划(2021-008) （2021-008）
湖北省中央引导地方科技发展专项(2024CSA094) （2024CSA094）
精细爆破全国重点实验室博士启动基金(PBSKL-2022-QD-03) （PBSKL-2022-QD-03）
