Numerical Simulation of Liquid-Solid Coupling in Multi-Angle Fractures in Pressure-Sensitive Reservoirs

The interaction between the cohesive zone and the elastic stiffness heterogeneity in the peeling of an adhesive tape from a rigid substrate is examined experimentally and with finite element simulations. It is established in the literature that elastic stiffness heterogeneities can greatly enhance the force required to peel a tape without changing the properties of the interface. However, much of these concern brittle materials where the cohesive zone is limited in size. This paper reports the results of peeling experiments performed on pressure-sensitive adhesive tapes with both an elastic stiffness heterogeneity and a substantial cohesive zone. These experiments show muted enhancement in the peeling force and suggest that the cohesive zone acts to smooth out the effect of the discontinuity at the edge of the elastic stiffness heterogeneities, suppressing their effect on peel force enhancement. This mechanism is examined through numerical simulation which confirms that the peel force enhancement depends on the strength of the adhesive and the size of the cohesive zone.

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The Application of RKPM for the Numerical Simulation of Pressure-Sensitive Material using a Cap Plasticity Model

Proceedings of the Seventh International Conference on Computational Structures Technology ◽

10.4203/ccp.79.129 ◽

2009 ◽

Author(s):

A.R. Khoei ◽

M. Samimi

Keyword(s):

Numerical Simulation ◽

Plasticity Model ◽

Sensitive Material ◽

Pressure Sensitive ◽

Cap Plasticity

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Numerical Simulation of Pressure Distribution between Injection and Production Well in Low Permeability Reservoir

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.807-809.2554 ◽

2013 ◽

Vol 807-809 ◽

pp. 2554-2557

Author(s):

Qi Han Zhang ◽

Zi Yi Guo ◽

Ji Peng ◽

Ting Song Xiong ◽

Shi Feng Xue

Keyword(s):

Numerical Simulation ◽

Pressure Gradient ◽

Pressure Distribution ◽

Low Permeability ◽

Threshold Pressure ◽

Production Well ◽

Pressure System ◽

Threshold Pressure Gradient ◽

Low Permeability Reservoir ◽

Pressure Sensitive

Considering the pressure-sensitive effect and threshold pressure gradient in low permeability reservoirs, a new mathematical model of the variable permeability for reservoir between injection and production well is established. The Garlerkin method is used to set up the finite element computation equations, and corresponding numerical simulation program is developed. The influence of Injection-production pressure, well spacing and hydraulic fracture are quantitative evaluation. The simulation results show that the pressure-sensitive effect and threshold pressure gradient has a strong influence on pressure distribution between injection and production wells. Establishing the effective driving pressure system is the key to improve well production of low permeability reservoir.

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Numerical simulation study on the bottom-water invasion in the carbonate gas reservoir with high angle fractures and high permeability zones

International Journal of Computational and Experimental Science and Engineering ◽

10.22399/ijcesen.535713 ◽

2019 ◽

Vol 5 (2) ◽

pp. 80-85

Author(s):

Shuang ZHANG ◽

Huiqing LIU ◽

Jie BAI

Keyword(s):

Numerical Simulation ◽

Simulation Study ◽

Bottom Water ◽

High Angle ◽

High Permeability ◽

Gas Reservoir ◽

Angle Fractures

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Size Effect of the Single Crystal Copper Based on D-P Yield Function

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.418.209 ◽

2013 ◽

Vol 418 ◽

pp. 209-212

Author(s):

Yi Hao ◽

Lu Feng ◽

Jing Wang

Keyword(s):

Numerical Simulation ◽

Single Crystal ◽

Strain Gradient ◽

Size Dependence ◽

Yield Function ◽

Element Formulation ◽

Gradient Plasticity ◽

Single Crystal Copper ◽

Pressure Sensitive ◽

Set Up

Studies of strain gradient plasticity theory have achieved considerable achievements in recent years. However, the combination of the mechanisms of the pressure-sensitive yielding and the size dependence of plastic deformation still remains an open challenge, especially in the relevant numerical simulation. In this paper, the finite-element formulation based on the flow theory of MSG plasticity for pressure-sensitive materials is set up. The elastic indentation response of the single crystal copper is computed using a user-defined eight-node isoparametric element through the USER-ELEMENT interface supported by the commercial software ABAQUS. The results of the numerical simulation show that the indenter load and the hardness have been slightly enhanced when the strain gradient is taken into account, compared to the results obtained from the CAX8R element.

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