Results 41 to 50 of about 4,749 (165)

Modeling proppant transport and settling in a 3D propagating fracture

Deep Underground Science and Engineering, EarlyView.
A versatile multiphysics tool is presented for simulating the complex processes involved in hydraulic fracturing treatments. The model couples fracture opening and propagation, variable‐density slurry flow, and proppant particle transport within the multiphysics object‐oriented simulation environment framework, based on two‐phase mixture equations and ...
Robert Egert, Aimé Fournier, Wencheng Jin   +2 more
wiley   +1 more source

Study on Fluid Pressure in Tubing, Dynamic Stress in Reservoir, and Fracture Propagation Morphology During Variable‐Rate Hydraulic Fracturing

Energy Science &Engineering, EarlyView.
Variable‐rate hydraulic fracturing can induce unsteady flow in the tubing, thereby generating fluctuating fluid pressure near the bottom‐hole reservoir. Dynamic stress is generated in the reservoir under the action of fluctuating fluid pressure and propagates as stress waves.
Zhu Ge, Wang Chaojing, Li Weicheng
wiley   +1 more source

A Phase‐Field Model for Quasi‐Dynamic Rupture Nucleation and Propagation of In‐Plane Faults

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Computational modeling of faulting processes is an essential tool for understanding earthquake mechanics but remains challenging due to the structural and material complexities of fault zones. The phase‐field method has recently enabled unified modeling of fault propagation and off‐fault damage within a fracture‐mechanics‐based framework ...
Fan Fei, Md Shumon Mia, Ahmed E. Elbanna, Jinhyun Choo   +3 more
wiley   +1 more source

Calibration of NASGRO equation for mixed-mode loading using experimental and numerical data

Revista Facultad de Ingeniería Universidad de Antioquia, 2019
A procedure to calibrate the NASGRO equation in a high yield-strength steel under mixed-mode loading (I+II) is presented. The calibration consists in obtaining the material parameters known as C, m, p and q.
David Reynaldo Berrios-Barcena, Rosendo Franco-Rodríguez, Francisco Aurelio Rumiche-Zapata   +2 more
doaj   +1 more source

Study of Stress Intensity Factor in Corrugated Plate Using Extended Finite Element Method (XFEM) [PDF]

Engineering and Technology Journal, 2016
The presence of crack with different lengths and locations in structure of corrugated plate is studied. XFEM is along with enrichment function based on partition of unity is used for the calculation of stresses due to the presence of crack.
Rafil Mahmood Laftah
doaj   +1 more source

Research on Extended Finite Element Method for Axisymmetric Electrostatic Field Based on Liquid Nitrogen with Bubbles

Applied Sciences, 2021
In this paper, the extended finite element method (XFEM) is first applied to account for the weak discontinuity of the axisymmetric electrostatic field. Firstly, the interface between two materials in an element is described by the level set method.
Nana Duan, Shaocong Lu, Xinyu Ma, Weijie Xu, Fuquan Jin, Shuhong Wang   +5 more
doaj   +1 more source

Investigating Fracture Behavior of Lattice Structures Using the XFEM and Equivalent Solid Material Model Techniques

Fatigue &Fracture of Engineering Materials &Structures, EarlyView.
ABSTRACT This study aims to numerically investigate the mode I, II, and III fracture behaviors of additively manufactured degradable, bioplastic polylactic acid (PLA) lattice specimens. Numerical simulations were performed using the eXtended Finite Element Method (XFEM) based on the extracted PLA's mechanical and fracture material properties.
Bahman Paygozar, Recep M. Gorguluarslan
wiley   +1 more source

Crack Process Investigation in Gears Under Single Tooth Bending Fatigue Condition Using Infrared Thermography and 3D XFEM Numerical Models

Fatigue &Fracture of Engineering Materials &Structures, EarlyView.
ABSTRACT The present study proposes a combined approach of infrared thermography and 3D XFEM numerical models for crack process investigation in mechanical components such as gears. Over the years, fatigue crack analysis based on energy dissipations in the form of heat generated during fatigue tests has been widely reported, although mainly limited to ...
Luca Corsaro, Lorenzo Fraccaroli, Francesca Maria Curà, Franco Concli   +3 more
wiley   +1 more source

Rock tunnel analysis considering crack propagation using extended finite element method based on a case study

Discover Geoscience
The analysis of rock tunnels can be significantly influenced by discontinuities, which affect their performance. However, evaluating discontinuous rock and crack propagation in tunnels using numerical methods poses certain challenges. The eXtended Finite
A. Johari, J. Shahsavar, S. M. Binesh
doaj   +1 more source

Tensile examination of progressive damage and failure in porous ceramic composite materials using the XFEM

Vojnotehnički Glasnik
Introduction/purpose: Porosity is a significant factor that causes voids to become trapped in materials during composite material fabrication. This study is dedicated to modelling fracture modes within highly stressed areas of an advanced SiC/Cf ...
Aicha Metehri, Kouider Madani, Belaïd Mechab, Mohammed Mokhtari, Ilias M.A. Ghermaoui   +4 more
doaj   +1 more source