黑龙江科技大学学报2025，Vol.35Issue(3)：442-447,6.DOI:10.3969/j.issn.2095-7262.2025.03.015
高温-水冷却含孔砂岩试件动态拉伸力学试验与耗能特征
Dynamic tensile mechanics test and energy dissipation characteristics of high temperature-water cooling sandstone with center hole specimens
摘要
Abstract
This paper aims to investigate the effect of water cooling on the dynamic tensile mechani-cal properties of sandstone with central hole specimens under high temperature.The study consists of tes-ting the basic physical properties of the porous sandstone specimens in natural state and the states cooled by high-temperature water at 200,400,600,800 and 1 000℃;conducting the dynamic tensile test of Brazil disc by using SHPB test device;and studying the effect of high temperature and water-cooling cou-pling on the dynamic characteristics behind sandstone with central hole specimens.The results show that with the increase of high temperature,the color of the specimen after water cooling changes from gray-white to brown,together with the increase of the specimenvolume and the decrease of the mass,density and longitudinal wave velocity,leading to the deterioration of the cross-sectional structure of the speci-men.The dynamic tensile strength decreases exponentially with high temperature,the radial dynamic strain increases linearly,and the crushing energy dissipation density increases exponentially,suggesting that the sandstone with central hole specimen is more easy to form the tensile damage and the increased degree of fragmentation.关键词
岩石动力学/含孔砂岩/高温-水冷却/动态拉伸/SHPBKey words
rock dynamics/sandstone with central hole/high temperature-water cooling/dynamic tensile/SHPB分类
建筑与水利引用本文复制引用
平琦,钱明,孙栋,刘子训,孔德龙..高温-水冷却含孔砂岩试件动态拉伸力学试验与耗能特征[J].黑龙江科技大学学报,2025,35(3):442-447,6.基金项目
国家自然科学基金项目(52074005 （）
52074006) （）
安徽省自然科学基金项目(1808085ME134) （1808085ME134）
