工程地质学报Issue(6)：1175-1181,7.DOI:10.13544/j.cnki.jeg.2015.06.019
三峡库区泥质粉砂岩的 SHPB 试验及能量耗散特征研究
SPLIT HOPKINSON PRESSURE BAR TEST AND ENERGY DISSIPATION CHARACTERISTICS OF ARGILLACEOUS SILTSTONE IN THREE GORGES RESERVOIR REGION
摘要
Abstract
This paper aims to comprehend the dynamic mechanics performance of argillaceous siltstone in the moisture conditions.It carries out the split Hopkinson pressure bar test on argillaceous siltstone under different impact speeds.The energy dissipation characteristics of the samples are carefully analyzed.The results show that the loading rate and moisture condition play a great role on the failure of rock samples.The change of moisture content has a great influence on energy dissipation characteristics of the rock sample under the same impact load.The higher the impact rate,the higher the strain rate of the specimens.The greater moisture content,the specific energy absorption and the degree of fragmentation also become higher,the average lumpiness of fragmentation becomes smaller.Change of water content is the main factor that leads to the change of fracture toughness.Increase of moisture content leads to the reduction of the fracture toughness of the specimen,which will result in breaking into smaller pieces more easily.关键词
泥质粉砂岩/含水率/能量耗散/断裂韧度Key words
Argillaceous siltstone/Moisture content/Energy dissipation/Fracture toughness分类
天文与地球科学引用本文复制引用
黄明,詹金武,胡柳青,张旭东..三峡库区泥质粉砂岩的 SHPB 试验及能量耗散特征研究[J].工程地质学报,2015,(6):1175-1181,7.基金项目
国家自然科学基金（41202195），福建省自然科学基金（2012J05090），教育部博士点新教师基金（20123514120005）资助． （）
