M. Mokni, J. Desrues
{"title":"Strain localization measurements in undrained plane-strain biaxial tests on Hostun RF sand","authors":"M. Mokni, J. Desrues","doi":"10.1002/(SICI)1099-1484(199907)4:4<419::AID-CFM70>3.0.CO;2-1","DOIUrl":null,"url":null,"abstract":"Results from a series of biaxial undrained tests on a fine, angular, quartz sand (Hostun FR) are presented. Both dilative and contractive specimens were tested. Strain localization in the specimen was recorded using a false relief stereophotogrammetric method, which allows a full-field measurement of the incremental strain within a specimen throughout the test. Incremental strain maps are obtained at different states on the stress–strain response. It is shown that shear banding can take place in both contractive and dilative specimens, but for the latter the onset of localization is delayed until cavitation takes place in the pore-fluid. It is concluded that in dilative granular media, non-drainage can preclude localization as long as cavitation in the pore-fluid does not relax the isochoric constraint. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"125 1","pages":"419-441"},"PeriodicalIF":0.0000,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"180","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics of Cohesive-frictional Materials","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/(SICI)1099-1484(199907)4:4<419::AID-CFM70>3.0.CO;2-1","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 180
hoston RF砂不排水平面-应变双轴试验中的应变局部化测量
结果从一系列的双轴不排水试验的细,角,石英砂(Hostun FR)提出。膨胀和收缩标本均进行了测试。使用假浮雕立体摄影测量方法记录试样中的应变定位,该方法允许在整个测试过程中对试样内的增量应变进行全场测量。得到了不同状态下应力-应变响应的增量应变图。结果表明,在收缩和扩张试样中均可发生剪切带化,但对于后者,局部化的发生延迟到孔隙流体中发生空化。结论是,在膨胀的颗粒介质中,只要孔隙流体中的空化不放松等时约束,不排水就可以排除局部化。版权所有©1999 John Wiley & Sons, Ltd
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