Mechanical behavior of fine-grained sandstone in triaxial compression and elastoplastic modeling by return mapping algorithms

2017 ◽  
Vol 77 (4) ◽  
pp. 1689-1699 ◽  
Author(s):  
Susheng Wang ◽  
Weiya Xu ◽  
Chaojun Jia ◽  
Wei Wang
Keyword(s):  
Mechanical Behavior ◽  
Triaxial Compression ◽  
Mapping Algorithms ◽  
Fine Grained ◽  
Return Mapping ◽  
Elastoplastic Modeling

Mechanical behavior of human morselized cancellous bone in triaxial compression testing

1998 ◽  
Vol 16 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Michael D. Brodt ◽  
Colby C. Swan ◽  
Thomas D. Brown
Keyword(s):  
Mechanical Behavior ◽  
Cancellous Bone ◽  
Triaxial Compression ◽  
Compression Testing

Assessment of Inherent Anisotropy and Confining Pressure Influences on Mechanical Behavior of Anisotropic Foliated Rocks Under Triaxial Compression

2015 ◽  
Vol 49 (6) ◽  
pp. 2155-2163 ◽  
Author(s):  
Davood Fereidooni ◽  
Gholam Reza Khanlari ◽  
Mojtaba Heidari ◽  
Ali Asghar Sepahigero ◽  
Amir Pirooz Kolahi-Azar
Keyword(s):  
Mechanical Behavior ◽  
Triaxial Compression ◽  
Confining Pressure ◽  
Inherent Anisotropy

Effect of Freeze-Thaw Cycles on Mechanical Behavior of Compacted Fine-Grained Soil

2012 ◽  
Author(s):  
Guoyu Li ◽  
Wei Ma ◽  
Shuping Zhao ◽  
Yuncheng Mao ◽  
Yanhu Mu
Keyword(s):  
Mechanical Behavior ◽  
Freeze Thaw ◽  
Fine Grained ◽  
Fine Grained Soil

Investigation of the effect of stress states on hydro-mechanical behaviors of reservoir rock under fluid injection

2021 ◽  
Author(s):  
Qi Li ◽  
Miao He ◽  
Michael Kühn ◽  
Xiaying Li ◽  
Liang Xu
Keyword(s):  
Stress State ◽  
Mechanical Behavior ◽  
Triaxial Compression ◽  
Reservoir Rock ◽  
Fluid Injection ◽  
Differential Stress ◽  
Mechanical Coupling ◽  
Injection Process ◽  
The Difference ◽  
Stress States

<p>Injecting fluid into the formation is an effective solution for improving the permeability and production of a target reservoir. The evaluation of economy and safety of injection process is a challenging issue faced in reservoir engineering [1-2]. As known, the relative magnitude and direction of the principal stresses significantly influence the hydro-mechanical behavior of reservoir rock during fluid injection. However, due to the limitations of current testing techniques, it is still difficult to comprehensively conduct laboratory injection tests under various stress conditions, e.g. triaxial extension stress states [3]. To this end, a series of numerical simulations were carried out on reservoir rock to study the hydro-mechanical changes under different stress states during fluid injection. In this modelling, the saturated rock is first loaded to the target stress state under drainage conditions, and then the stress state is maintained and water is injected from the top end to simulate the reservoir injection process. Particular attention is paid to the difference in hydro-mechanical changes under triaxial compression and extension stresses. This includes the difference of the pore pressure propagation, mean effective stress, volumetric strain, and stress-induced permeability. The numerical results demonstrate that the differential stress will significantly affect the hydro-mechanical behavior of target rock, but the degree of influence is different under the two triaxial stress states. The hydro-mechanical changes caused by the triaxial compression stress states are generally greater than that of extension, but the difference decreases with increasing differential stress, indicating that the increase of the differential stress will weaken the impact of the stress state on the hydro-mechanical response. This study can deepen our understanding of the stress-induced hydro-mechanical coupling process in reservoir injection engineering.</p><p>Keywords: Reservoir injection; Subsurface flow; Hydro-mechanical coupling; Stress state; Triaxial experiment modelling</p><p>[1] Li, X., Lei, X. & Li, Q. 2016. Injection-induced fracturing process in a tight sandstone under different saturation conditions. Environmental Earth Sciences, 75, 1466, http://doi.org/10.1007/s12665-016-6265-2</p><p>[2] Yang, D., Li, Q. & Zhang, L. 2016. Propagation of pore pressure diffusion waves in saturated dual-porosity media (II). Journal of Applied Physics, 119, 154901, http://doi.org/10.1063/1.4946832</p><p>[3] Xu, L., Li, Q., Myers, M., Tan, Y., He, M., Umeobi, H.I. & Li, X. 2021. The effects of porosity and permeability changes on simulated supercritical CO<sub>2</sub> migration front in tight glutenite under different effective confining pressures from 1.5 MPa to 21.5 MPa. Greenhouse Gases: Science and Technology, http://doi.org/10.1002/ghg.2043</p>

Return-mapping algorithms for associative isotropic hardening plasticity using conic optimization

2020 ◽  
Vol 78 ◽  
pp. 724-748
Author(s):  
Hugo Bruno ◽  
Guilherme Barros ◽  
Ivan F.M. Menezes ◽  
Luiz Fernando Martha
Keyword(s):  
Isotropic Hardening ◽  
Conic Optimization ◽  
Mapping Algorithms ◽  
Return Mapping

X-ray microtomography for studying localized deformation in fine-grained geomaterials under triaxial compression

2004 ◽  
Vol 332 (10) ◽  
pp. 819-826 ◽  
Author(s):  
G VIGGIANI ◽  
N LENOIR ◽  
P BESUELLE ◽  
M DIMICHIEL ◽  
S MARELLO ◽  
...  
Keyword(s):  
Triaxial Compression ◽  
Localized Deformation ◽  
X Ray ◽  
Fine Grained
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