Experimental Strain Response-Envelopes of Granular Materials for Monotonous and Low-Cycle Loading Processes

Danne, Stefanie; Hettler, Achim

doi:10.1007/978-3-319-18170-7_12

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…Incremental response envelopes [24,25,54] reveal important characteristics soil behaviour such as incremental nonlinearity, associative behaviour, uniqueness of flow rule, etc. Measuring incremental responses in the laboratory is difficult, [21,22], because of the highly accurate strain measurements required and the need to test several identical samples (one for each probe). For this reason DEM models have been frequently used to study the incremental behaviour of granular materials [3,7,11,47,58,60].…”

Section: Introductionmentioning

confidence: 99%

Micromechanical inspection of incremental behaviour of crushable soils

Ciantia

Arroyo²,

O’Sullivan

et al. 2019

Acta Geotech.

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In granular soils grain crushing reduces dilatancy and stress obliquity enhances crushability. These are well-supported specimen-scale experimental observations. In principle, those observations should reflect some peculiar micromechanism associated with crushing, but which is it? To answer that question the nature of crushing-induced particle-scale interactions is here investigated using an efficient DEM model of crushable soil. Microstructural measures such as the mechanical coordination number and fabric are examined while performing systematic stress probing on the triaxial plane. Numerical techniques such as parallel and the newly introduced sequential probing enable clear separation of the micromechanical mechanisms associated with crushing. Particle crushing is shown to reduce fabric anisotropy during incremental loading and to slow fabric change during continuous shearing. On the other hand, increased fabric anisotropy does take more particles closer to breakage. Shear-enhanced breakage appears then to be a natural consequence of shear-enhanced fabric anisotropy. The particle crushing model employed here makes crushing dependent only on particle and contact properties, without any pre-established influence of particle connectivity. That influence does not emerge, and it is shown how particle connectivity, per se, is not a good indicator of crushing likelihood.

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Section: Introductionmentioning

confidence: 99%

Micromechanical inspection of incremental behaviour of crushable soils

Ciantia

Arroyo²,

O’Sullivan

et al. 2019

Acta Geotech.

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“…Quasi-static loading is characterised by time effect negligibility. In geotechnical field of studies such loading appears when its frequency is less than 2-5 Hz (Danne and Hettler 2015;Wichtmann 2005). The quasi-static phenomena occurs when harmonic excitation applied on a specimen causes displacement: u ¼ u ampl cosðxtÞ with acceleration € u ¼ Àu ampl x 2 cosðxtÞ, where u ampl x 2 \\g (Danne and Hettler 2015).…”

Section: Introductionmentioning

confidence: 99%

Energy-based analysis of permanent strain behaviour of cohesive soil under cyclic loading

et al. 2017

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In this paper the original results of uniaxial cyclic compression test on cohesive soil are presented. The shakedown phenomena in cohesive soil are described. Energy-based method highlights the change of soil material behaviour from plastic shakedown through plastic creep shakedown to incremental collapse. The samples were cyclically loaded under undrained conditions with the constant amplitude of stress in one-way test procedure. In this study the energy-based method was presented as a proper method to categorise response of cohesive soil to cyclic loading in uniaxial conditions. A shakedown criterion factor, S E , was introduced to help understand the shakedown phenomena in cohesive soil. In cohesive soils the absence of a limit between plastic shakedown and plastic creep shakedown was pointed out.

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Experimental and Numerical Element Tests for Granular Soils: Performance of Different Constitutive Models for Monotonous and Low-Cycle Loading

Danne

Hettler

2015

Holistic Simulation of Geotechnical Installation Processes

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Experimental Strain Response-Envelopes of Granular Materials for Monotonous and Low-Cycle Loading Processes

Cited by 6 publications

References 16 publications

Micromechanical inspection of incremental behaviour of crushable soils

Micromechanical inspection of incremental behaviour of crushable soils

Energy-based analysis of permanent strain behaviour of cohesive soil under cyclic loading

Experimental and Numerical Element Tests for Granular Soils: Performance of Different Constitutive Models for Monotonous and Low-Cycle Loading

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