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Effects of end restraint and strain rate in triaxial tests
Luleå University of Technology.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.
Luleå University of Technology.
1997 (engelsk)Inngår i: Computers and geotechnics, ISSN 0266-352X, E-ISSN 1873-7633, Vol. 21, nr 3, s. 163-182Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Inhomogeneities caused by end restraint and insufficient drainage during conventional compression triaxial tests are analysed by a numerical method. A finite element model is presented to simulate the testing procedure. The soil-platen interaction is represented by contact elements which allow frictional sliding between contacting nodes. The soil mass is represented by the modified Cam clay model. Coupled hydro-mechanical analyses are carried out in order to simulate both drained and undrained tests. The distributions of stresses and strains in the specimen for different end conditions are compared with the ideal case where no end restraint exists, in order to find representative measuring positions in the sample. Different rates of axial strain are tested in order to study the inhomogeneities caused by insufficient drainage during drained tests. Simulated results show that both end restraint and insufficient drainage can cause the barrel-shape deformation of the specimen. Stress-strain and strength properties based on global measurements are not a good representation of the true material behaviour of one single soil element at constitutive level.

sted, utgiver, år, opplag, sider
1997. Vol. 21, nr 3, s. 163-182
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URN: urn:nbn:se:ltu:diva-8585DOI: 10.1016/S0266-352X(97)00021-9ISI: A1997YD93200001Lokal ID: 71bc7fb0-9c05-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-8585DiVA, id: diva2:981523
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Godkänd; 1997; 20070104 (pafi)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Westerberg, BoMattsson, Hans

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