张雨波,茅献彪,陶静,李明

• 1:中国矿业大学力学与建筑工程学院
• 2:中国矿业大学深部岩土力学与地下工程国家重点实验室

摘要(Abstract)：

借助于ANSYA/LS-DYNA数值分析软件对SHPB试验进行数值模拟,就不同应变率对砂岩力学性能的影响进行了研究,探讨了不同应变率对砂岩峰值应力、弹性模量、软化模量的影响规律,系统地分析了砂岩在不同应变率作用下的破坏规律。结果表明:随着应变率的增加,峰值应力显著增加,表现出较强的应变率相关性;应变率增大,弹性模量随之增大,但增长速率逐渐减小;应变率越大,软化模量反而降低。应变率ε从632.4 s-1变化到752.5 s-1时,软化模量由-2.98降到-4.18,降低了28.71%;当应变率ε大于752.5 s-1为1757.9时,软化模量仅降低了5%,说明应变率较大时变化趋势较为缓慢。高应变率下砂岩试件的动态压缩破坏主要呈现为轴向劈裂破坏。

关键词(KeyWords)： 高应变率;砂岩;SHPB;力学性质

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(973计划)项目(2010CB226800);; 国家自然科学基金仪器项目(51227003)

作者(Author): 张雨波,茅献彪,陶静,李明

参考文献(References)：

• [1]朱晶晶.冲击载荷作用下砂岩的动力学特性及损伤规律[J].中南大学学报(自然科学版),2012,43(7):2701-2707.[1]ZHU Jing-jing.Experimental test and dam age characteristics of sandstone under uniaxial impact compressive loads[J].Journal of Central South University(Science and Technology),2012,43(7):2701-2707.(in Chinese)
• [2]谢世勇,王艳霞,赵伏军.冲击载荷作用下岩石破碎数值模拟及试验研究[J].中国钨业,2010,22(5):5-9.[2]XIE Shi-yong,WANG Yan-xia,ZHAO Fu-jun.Numerical simulation and experimental research on rock fragmentation under impact loading[J].China Tungsten Industry,2010,22(5):5-9.(in Chinese)
• [3]王俊奇,王亮,张杰.冲击载荷下岩石压胀对其性质的影响[J].爆炸与冲击,2012,12(3):333-336.[3]WANG Jun-qi,WANG Liang,ZHANG Jie.Influences of dilatancy on rock properties under shock loading[J].Explosion and Shock Waves,2012,12(3):333-336.(in Chinese)
• [4]李夕兵.冲击载荷作用下硬岩层裂破坏的理论和试验研究[J].岩石力学与工程学报,2011,8(6):1081-1088.[4]LI Xi-bing.Theoretical and expeium ental study of hard rock spalling fracture under im pact dynam ic loading[J].Chinese Journal of Rock Mechanics and Engineering,2011,8(6):1081-1088.(in Chinese)
• [5]高富强,杨军,张华.冲击载荷作用下岩石材料模型实验验证[J].爆破,2009,6(2):1-4.[5]GAO Fu-qiang,YANG Jun,ZHANG Hua.Numerical validation of rock mechanical properties under impact loading[J].Blasting,2009,6(2):1-4.(in Chinese)
• [6]汪亦显,曹平,尹士兵.冲击载荷下脆性岩板损伤断裂演化的实验模拟研究[J].四川大学学报,2011(6):86-89.[6]WANG Yi-xian,CAO Ping,YIN Tu-bing.Simulation research for impact damage fracture evolution of brittle rock plate under impact loading[J].Journal of Sichuan University,2011(6):86-89.(in Chinese)
• [7]洪亮.冲击荷载下岩石强度及破碎能耗特征的尺寸效应研究[D].长沙:中南大学,2008.
• [8]夏昌敬.冲击载荷作用下岩石动态力学性能的数值分析[J].弹道学报,2009,21(3):11-14.[8]XIA Chang-jing.Numerical analysis of dynamic mechanical properties of rocks under impact load[J].Ballistics,2009,21(3):11-14.(in Chinese)
• [9]王俊奇,王亮,张杰.冲击载荷下岩石压胀对其性质的影响[J].爆炸与冲击,2012,2(3):333-336.[9]WANG Jun-qi,WANG Liang,ZHANG Jie.Influences of dilatancy on rock properties under shock loading[J].Explosion and Shock Waves,2012,2(3):333-336.(in Chinese)
• [10]ARK S W,XIA Q,ZHOU M.Dynamic behavior of concrete at high strain rates and pressures:II.numerical simulation[J].International Journal of Impact Engineering,2001,25(9):887-910.
• [11]ZHAO J,LI H B,WU M B,et al.Dynamic uniaxial compression tests on a granite[J].International Journal of Rock Mechanics and Mining Sciences,1999,36(2):273-277.
• [12]REDDISH D J,STACE L R,VANICHKOBCHINDA P,et al.Numerical simulation of the dynamic impact breakage testing of rock[J].International Journal of Rock Mechanics and Mining Sciences,2005,42(2):167-176.
• [13]JOO Kim D,SIRIJAROONCHAI K,El-Tawil S,et al.Numerical simulation of the Split Hopkinson Pressure Bar test technique for concrete under compression[J].International Journal of Impact Engineering,2010,37(2):141-149.
• [14]CHO S H,OGATA Y,KANEKO K.Strain-rate dependency of the dynamic tensile strength of rock[J].International Journal of Rock Mechanics and Mining Sciences,2003,40(5):763-777.
• [15]YANG Sheng-qi.Strength and deformation behavior of red sandstone under multi-stage triaxial compression[J].Canadian Geotechnical Journal,2012,49(6):694-709.
• [16]叶涛,张柱银.动高压冲击下岩石破裂机理及相变研究[J].岩土力学,2007,28(10):2197-2201.[16]YE Tao,ZHANG Zhu-yin.Experiment on fracture mechanism of rocks under dynamic high-pressure[J].Rock and Soil Mechanics,2007,28(10):2197-2201.(in Chinese)
• [17]任兴涛,周听清,钟方平,等.花岗岩动态力学性能的实验研究[J].实验力学,2010,25(6):723-730.[17]REN Xing-tao,ZHOU Ting-qing,ZHONG Fang-ping,et al.Experimental study for the dynamic mechanical behavior of granite[J].Journal of Experimental Mechanics,2010,25(6):723-730.(in Chinese)