| 含水率对非饱和黏土动态压缩特性的影响 |
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| 引用本文： | 丁育青, 汤文辉, 徐鑫, 冉宪文. 含水率对非饱和黏土动态压缩特性的影响[J]. 爆炸与冲击, 2013, 33(6): 625-630. doi: 10.11883/1001-1455(2013)06-0625-06 |
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| 作者姓名： | 丁育青 汤文辉 徐鑫 冉宪文 |
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| 作者单位： | 国防科学技术大学理学院工程物理研究所,湖南长沙410073 |
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| 摘 要： | 为探讨含水率对非饱和黏土动态压缩特性的影响规律,利用分离式霍普金森压杆(SHPB)实验装置,针对不同含水率非饱和黏土试样开展了侧限条件下的动态压缩实验。实验结果表明,在径向变形受到约束时,当黏土中含有少量水时,比干黏土更容易压缩;而当含水率进一步增加时,试样在受压过程中逐渐接近饱和状态,黏土的抗压性能则明显提升。从能量吸收与分配角度来看,随着含水率的增加,试样所吸收的总能量在逐渐下降,体积改变能所占的比例逐渐增大,而形状改变能所占比例则逐渐减小。
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| 关 键 词： | 固体力学 动态压缩特性 SHPB 黏土 含水率 能量吸收 |
Experimentalstudyofmoistureeffectsondynamiccompressionpropertiesofunsaturatedclay |
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| DingYu-qing, TangWen-hui, XuXin, RanXian-wen. Experimentalstudyofmoistureeffectsondynamiccompressionpropertiesofunsaturatedclay[J]. Explosion And Shock Waves, 2013, 33(6): 625-630. doi: 10.11883/1001-1455(2013)06-0625-06 |
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| Authors: | DingYu-qing TangWen-hui XuXin RanXian-wen |
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| Affiliation: | InstituteofEngineeringPhysics,CollegeofScience, |
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| Abstract: | Abstract:Dynamiccompressionexperimentswereperformedwithamodifiedsplit-Hopkinsonpressurebartoexploretheeffectsofmoisturecontentonthedynamiccompressionpropertiesofunsaturatedclayundertheconstantstrin-rateloading.Theexperimentalresultsindicatethatwhenthewatercontentislow,thewateraddedintheclay,theradialformationofwhichisconfined,actsaslubricantandcanreducethefrictionbetweentheclayparticlessothattheunsaturatedlayiscompressedmoreeasilythanthedryclay.Butwiththeincreasingofthewatercontent,thevoidsaregraduallydisplacedbywater,makingitdifficultforclayparticlestodisplacetheinterstitialgaps,consequently,theclaymarkedlybecomesgoodinanti-compressionproperties.Andasthewatercontentincreases,thetotalenergyabsorbedbytheclaydecreases,inwhichtheportionofthevolumetricdeformationenergyincreasesandtheportionofthedeviatoricdeformationenergydescends. |
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| Keywords: | solidmechanics dynamiccompressionproperty SHPB clay moisturecontent absorption')" href=" #" >energy
absorption |
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