Insights into void ratio redistribution during undrained monotonic shearing of Malaysian kaolin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10513598" target="_blank" >RIV/00216208:11310/25:10513598 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=edutlHpYVT" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=edutlHpYVT</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1680/jgele.24.00168" target="_blank" >10.1680/jgele.24.00168</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Insights into void ratio redistribution during undrained monotonic shearing of Malaysian kaolin

Popis výsledku v původním jazyce

This article experimentally and numerically evaluates the void ratio redistribution observed during undrained monotonic shearing of Malaysian kaolin at different loading rates. On the one hand, undrained monotonic triaxial tests were performed on normally consolidated samples of Malaysian kaolin. In these tests, the void ratio was measured in different sections of the sample before and after the undrained monotonic shearing stage. On the other hand, fully coupled three-dimensional numerical simulations were conducted using an anisotropic hypoplastic model for clays. The experimental and numerical results revealed that, although there was obviously no variation in the global void ratio during undrained monotonic shearing, a redistribution of void ratio was observed within the samples, remarkable at all loading rates investigated. Numerical simulations also revealed significant pore water pressure inhomogeneity, which, however, decreased with decreasing loading rates. The rigid end platens further imposed significant inhomogeneity of total stress state within the samples. The reasons for these observations are thoroughly analysed and discussed throughout the article. The results show that assumptions adopted in calibrations of constitutive models using single element tests (constant volume and homogeneous stress and pore water pressure distribution) do not adequately reproduce the more complex reality.

Název v anglickém jazyce

Insights into void ratio redistribution during undrained monotonic shearing of Malaysian kaolin

Popis výsledku anglicky

This article experimentally and numerically evaluates the void ratio redistribution observed during undrained monotonic shearing of Malaysian kaolin at different loading rates. On the one hand, undrained monotonic triaxial tests were performed on normally consolidated samples of Malaysian kaolin. In these tests, the void ratio was measured in different sections of the sample before and after the undrained monotonic shearing stage. On the other hand, fully coupled three-dimensional numerical simulations were conducted using an anisotropic hypoplastic model for clays. The experimental and numerical results revealed that, although there was obviously no variation in the global void ratio during undrained monotonic shearing, a redistribution of void ratio was observed within the samples, remarkable at all loading rates investigated. Numerical simulations also revealed significant pore water pressure inhomogeneity, which, however, decreased with decreasing loading rates. The rigid end platens further imposed significant inhomogeneity of total stress state within the samples. The reasons for these observations are thoroughly analysed and discussed throughout the article. The results show that assumptions adopted in calibrations of constitutive models using single element tests (constant volume and homogeneous stress and pore water pressure distribution) do not adequately reproduce the more complex reality.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/LUC24143" target="_blank" >LUC24143: Konceptualizace a modelování akumulace tepelné energie pro hybridní systémy dálkového vytápění a chlazení v České republice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geotechnique Letters

ISSN

2049-825X

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

226-235

Kód UT WoS článku

001483068600001

EID výsledku v databázi Scopus

2-s2.0-105003961163