Study on the dilatancy angle of rocks in the pre-failure domain

Kwaśniewski, Marek; Rodriguez-Oitaben, P.

doi:10.1201/b11646-122

Cited by 7 publications

(2 citation statements)

References 1 publication

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“…where v Ruc is Poisson's ratio of RuC, V concrete and V rubber are the volumetric fraction of concrete matrix and rubber particles in the RuC mixes [12] respectively and v Ruis the Poisson's ratio of the rubber particles (v Ru =0.50) [19]. The plastic behavior of concrete modelled in ABAQUS [17] by using concrete damage plasticity (CDP), based on Drucker-Prager Hyperbolic Function.…”

Section: 1references Experimental Programmentioning

confidence: 99%

Behavior of Rubberized Concrete-Filled Square Steel Tube Under Axial Loading

Al-Shwaiter

Al-Gaboby

2019

JST

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The purpose of this paper is to investigate the behavior of rubberized concrete-filled steel tube (RuCFST)analytically by using ABAQUS 6.12-1 software for square columns under axial loading. Twelve specimens modeled with various variables which are rubber content as replacement percentage from natural aggregate (0%, 5% and 15%), tube thickness (3mm and 6mm) and columns’ length (1.5m and 3.0m). The results showed an adoption model of RuCFST columns subjected to axial force in elastic and plastic properties of steel and concrete gives a good agreement between numerical and references experimental results. Also, the results showed a reduction in column capacity with increasing rubber content. In contrast, the results showed an increase in the columns’ compression capacity with increasing the thickness from 3 to 6mm. In addition, columns’ lengths have no significant effect on compression capacity, although the corresponding shortening increased with increase column’s length. Keywords: Rubberized concrete, Infilled steel tube, Finite element, Axial loading and ABAQUS.

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Section: 1references Experimental Programmentioning

confidence: 99%

Behavior of Rubberized Concrete-Filled Square Steel Tube Under Axial Loading

Al-Shwaiter

Al-Gaboby

2019

JST

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“…The salt deposits were assumed to behave according to the von Mises failure criterion, commonly used in ductile materials in which plastic behavior is driven by slippage of the crystal planes, in this case of salt crystals along the surface of maximum shear stress (Jeremic 1994). Other mechanical properties for the lithostratigraphic units of the overburden and the rocks surrounding the model were assigned according to the literature (Handing & Hager 1957, Smith & Faulkner 2010, Kwaśniewski & Rodriguez-Oitaben 2012 and are listed in Table 1 and 2. Pore pressure and boundary conditions Pore pressure.…”

Section: Other Mechanical Parameters Of the Reservoir And The Embeddementioning

confidence: 99%

Geomechanical modellingl of Paleozoic Shale Gas Formation: a case study from the Baltic Basin, northern Poland

Słota-Valim

Sowiżdżał

Jędrzejowska-Tyczkowska

2017

geol

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The article presents the importance and position of geomechanical modelling workflow in reservoir characterization studies dedicated to unconventional shale reservoirs. We show the results of 3D geomechanical modelling carried out in an onshore area within the Baltic Basin, northern Poland, where the Silurian and Ordovician shale formations are the exploration targets. The fundamental elements of the methodology, processes, and available datasets used in the modelling are discussed. The petrophysical, elastic, and mechanic properties of the rock were applied in the modelling process, along with the principal stresses and pore pressure in the geological formation. Moreover, the main calculation methods and data requirements for the Mechanical Earth Model construction are discussed. A comprehensive 3D geomechanical model was constructed, providing important information to engineers and decision makers which allows them to optimize well placement, the direction of the horizontal section of the borehole and the parameters of hydraulic fracturing treatment. The model can identify zones of higher potential within the area of interest in terms of efficient stimulation treatment design.

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Experimental Study of Compact Sandstone Deformation Under Axisymmetric Triaxial Loading Along Specific Paths in Stress Space

Janeček,

Mishra,

Vishnu

et al. 2023

Rock Mech Rock Eng

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The deformation of rocks well below their ultimate strengths is frequently described through the constant stiffness moduli of the linear elasticity theory. In addition, the isotropic material approximation is usually used as the basic approach. Particularly in sedimentary rocks, local inhomogeneities, anisotropy, and irreversible processes, mainly related to the gradual breakage of grain joints, can affect their deformation behavior from the beginning of the loading. Consequently, the stiffness moduli measured under triaxial conditions are effective parameters, which may depend on the loading path in the stress space. Therefore, a complex experimental study of the deformation response of compact sedimentary rock (Brenna sandstone) along various paths in triaxial stress space was prepared to understand this dependence. In addition, a detailed analysis of the rock composition and structure of this compact sandstone was carried out. This paper presents an initial experimental study that is based on a loading method using alternative stress paths that correspond to different modes of the monotonic increase in differential stress from an initial isotropic compression state. In the experiment, the dependence of stiffness moduli on the loading path was found. Differences in rock deformation for conventional triaxial compression and extension can be attributed to a slight rock anisotropy originating from the stratification. The different behavior of deformation and related stiffness moduli along so-called reduced triaxial paths and conventional paths indicates that irreversible processes must be taken into account.

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Study on the dilatancy angle of rocks in the pre-failure domain

Cited by 7 publications

References 1 publication

Behavior of Rubberized Concrete-Filled Square Steel Tube Under Axial Loading

Behavior of Rubberized Concrete-Filled Square Steel Tube Under Axial Loading

Geomechanical modellingl of Paleozoic Shale Gas Formation: a case study from the Baltic Basin, northern Poland

Experimental Study of Compact Sandstone Deformation Under Axisymmetric Triaxial Loading Along Specific Paths in Stress Space

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