| 冲击荷载循环作用下砂岩动态力学性能的围压效应研究 |
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| 引用本文： | 吕晓聪,许金余,赵德辉,葛洪海,王泽东.冲击荷载循环作用下砂岩动态力学性能的围压效应研究[J].工程力学,2011(1):138-144. |
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| 作者姓名： | 吕晓聪 许金余 赵德辉 葛洪海 王泽东 |
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| 作者单位： | 空军工程大学工程学院;西北工业大学力学与建筑工程系;空军工程设计研究局; |
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| 基金项目： | 国家自然科学基金项目(51078350) |
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| 摘 要： | 利用带围压装置的霍普金森压杆设备对砂岩在不同围压等级、不同应变率下的动态力学性能进行试验研究,分析了砂岩在冲击荷载循环作用下的累积比能量吸收值,损伤度与围压等参量之间的关系.研究结果表明:在围压作用下,砂岩的应力-应变曲线出现较明显的屈服平台,具有明显的脆性-延性转化特征.随着冲击荷载循环作用次数的增加,材料的弹性模量...
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| 关 键 词： | 砂岩 霍普金森压杆 围压 应变率 能量吸收率 损伤度 |
RESEARCH ON CONFINING PRESSURE EFFECT OF SANDSTONE DYNAMIC MECHANICAL PERFORMANCE UNDER THE CYCLICAL IMPACT LOADINGS |
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| LU Xiao-cong,XU Jin-yu,ZHAO De-hui,GE Hong-hai,WANG Ze-dong.RESEARCH ON CONFINING PRESSURE EFFECT OF SANDSTONE DYNAMIC MECHANICAL PERFORMANCE UNDER THE CYCLICAL IMPACT LOADINGS[J].Engineering Mechanics,2011(1):138-144. |
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| Authors: | LU Xiao-cong XU Jin-yu ZHAO De-hui GE Hong-hai WANG Ze-dong |
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| Affiliation: | LU Xiao-cong1,XU Jin-yu1,2,ZHAO De-hui1,GE Hong-hai3,WANG Ze-dong1(1.The Engineering Institute,Air Force Engineering University,Xi'an,Shaanxi 710038,China,2.College of Mechanics and Civil Engineering,Northwestern Polytechnical University,Shaanxi 710072,3.Air Force Engineering Design & Research Bureau,Beijing 100068,China) |
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| Abstract: | Dynamic mechanical performance experiments are carried out for sandstone specimens at different confining pressures and different strain rates by using the split Hopkinson pressure bar equipment with confining pressure device.The paper analyzes the relationship among the accumulative total of special energy absorbency,confining pressure,and damage of sandstone under the cyclical impact load.It is demonstrated that sandstone has BDT(brittle-ductile transformation) property,and the yield platform is observed ... |
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| Keywords: | sandstone split Hopkinson pressure bar(SHPB) confining pressure strain rate energy absorbency ratio damage |
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