Modelling anisotropic damage and permeability of mortar under dynamic loads

Chen, Wen; Maurel, Olivier; Reess, Thierry; Matallah, Mohammed; Ferron, A. De; Borderie, Christian La; Pijaudier‐Cabot, Gilles

doi:10.3166/ejece.15.727-742

Cited by 2 publications

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“…The electrical discharge and the propagation of pressure are simulated with a diphasic model developed at CEA (French Alternative Energies and Atomic Energy Commission) and detailed in Refs. . The electrical discharge is described by an increase of enthalpy of water in a small region between the electrodes.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…In a first feasibility study , PAED‐induced compressive shock waves were used in order to induce damage on compression specimens. Then, a more realistic experimental study on hollow cylinders has been carried out . PAED was generated by placing electrodes inside cylinders, cored from concrete and sandstone blocks, and filled with water .…”

Section: Introductionmentioning

confidence: 99%

“…The principle of the 3‐D simulations, carried out with the finite element computer code europlexus are recalled in section 3, along with the experimental set‐up used in Ref. . Comparisons with experimental data are provided for several levels of confinements and amplitude of the dynamic waves.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of damage–permeability coupling for mortar under dynamic loads

Chen

Borderie

Maurel

et al. 2013

Num Anal Meth Geomechanics

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International audienceThe results reported in this paper deal with the simulation of damage in cohesive geomaterials such as rocks or concrete subjected to dynamic loads. The practical objective is to stimulate the production of tight gas reservoirs with a technique that is an alternative to hydraulic fracturing. The principle is that when subjected to dynamic loads, cohesive materials such as concrete, rocks or ceramics exhibit distributed micro-cracking as opposed to localised cracking observed under static loads. Hence, a low permeability rock containing gas trapped into occluded pores can be fragmented with the help of dynamic loads, and gas can be extracted in a much more efficient way compared with hydraulic fracturing, where only large macro cracks are formed with very few connections between occluded pores. At the stage of laboratory development of this technique, compressive underwater shock waves have been used to increase the intrinsic permeability of concrete specimens. In a previous study, pressure waves generated by pulsed arc electrohydraulic discharges in water were used in order to induce micro-cracking and an increase of average permeability of concrete hollow cylinders subjected to confinement stresses (equivalent to geostatic stresses). We discuss here a 3-D anisotropic constitutive model aimed at describing the dynamic response of these specimens. It is based on rate-dependent continuum damage constitutive relations. Crack closure effects and damage-induced anisotropy are included in the model. The directional growth of damage is related to the directional growth of material intrinsic permeability. Numerical simulations of damage induced by shock waves show good agreement with the experiments for various confinement levels of the specimens. © 2013 John Wiley & Sons, Ltd

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Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation of damage–permeability coupling for mortar under dynamic loads

Chen

Borderie

Maurel

et al. 2013

Num Anal Meth Geomechanics

Self Cite

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Rock breaking model implementation for rigless drilling with robust control of vibration

Jiang,

Hu,

Cheng

2023

Applied Mathematics and Nonlinear Sciences

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It is an urgent engineering technology requirement for rigless drilling explorers to keep the supporting force of the good wall and prolong the working cycle of the drilling bit, and the reduced rock-cutting strength without rock cracking could ensure the supporting force of the good wall to drilling explorer, and also extend the life of drilling bit. The rock-cracking model with high-voltage liquid discharge is established and simulated so as to obtain the characteristics of rock-cracking. The experimental test further verifies that the presented rock-cracking model of high-voltage liquid discharge can reduce the rock-cutting strength under the condition that the good wall does not collapse.

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Modelling anisotropic damage and permeability of mortar under dynamic loads

Cited by 2 publications

References 0 publications

Simulation of damage–permeability coupling for mortar under dynamic loads

Simulation of damage–permeability coupling for mortar under dynamic loads

Rock breaking model implementation for rigless drilling with robust control of vibration

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