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Showing 1 to 15 of 15 for “"Extended finite element method (XFEM)"”.
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Predicting failure behavior of polymeric and asphalt composites using damage models
… damage models within the framework of ABAQUS finite element software. The failure behavior of an IM7/977-2 carbon epoxy composite material subjected to a Mode I delamination is predicted using traction-separation and bulk material damage models that are based on disturbed state concept (DSC) …
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Novel Finite Element Techniques to Expedite the Implementation and Computational Time of 3D Structural Models Showcased Through Space Habitat
… of systems (SOS) framework. First, a generalized methodology was developed to reduce the implementation time associated with formulating arbitrary finite elements capable of capturing physical phenomena with reduced degrees of freedom. Then, a highly efficient computational approach using the …
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Parametric Sensitivities of XFEM Based Prognosis for Quasi-static Tensile Crack Growth
… standards. Conventional approaches using the finite element framework provides accurate solutions, yet they require extremely complicated numerical approaches or highly fine mesh densities which is computationally expensive and yet suffers from several numerical instabilities such as element …
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Study of photovoltaic (PV) module interconnections failure analysis and reliability
… lamination process. For the first time, the extended finite element method (XFEM) technique is used to determine the crack initiation temperature, crack location, direction and growth rate in solder joint of PV module interconnection under lamination process. Furthermore, the research used …
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Development of a Computational Approach to Assess Hip Fracture and Repair: Considerations of Intersubject and Surgical Alignment Variability
… of the art by utilizing a novel technique in the extended finite element method (XFEM) to assess hip fracture and develops a computational approach to evaluate fracture repair.</p> <p>Natural and implanted finite element models were used to predict fracture patterns and evaluate bone-implant load …
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Finite Element Analysis of Defects in Cord-Rubber Composites and Hyperelastic Materials
… advancements in theoretical and computational methods for analyzing composites, investigating the effect of lamina properties and lay-up configurations on the strength of composites still remains an active field of research. Finite Element Method (FEM) and Extended Finite Element Method (XFEM) …
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Dynamic Fracture of Adhesively Bonded Composite Structures Using Cohesive Zone Models
… material is implemented through an interface element, which is incorporated in ABAQUS using the user defined element (UEL) option. A procedure is established to formulate a rate dependent model based on experiments carried out on compact tension test specimens. The rate dependent model is …
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Numerical simulation of fluid flow, proppant transport and fracture propagation in hydraulic fractures for unconventional reservoirs.
… the fracture propagation was modelled using the extended finite element method (XFEM) and cohesive zone model (CZM), which can model the plastic deformations in the ductile rock. The fracture propagation was coupled with the CFD based proppant transport model, to model the fluid flow and proppant …
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Developing new multiscale models for the numerical simulation of Pultruded GFRP Structural Elements
… Polymers (FRP) are innovative structural elements gaining popularity for various structural applications due to their unique properties, such as magnetic transparency and an excellent strength-to-weight ratio. These materials have been extensively studied through experimental and numerical …
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A novel discrete damage zone model and enhancement of the extended finite element method for fracture mechanics problems
This research develops two novel numerical methods for applications in fracture mechanics: (I) A new crack tip enrichment function in the extended finite element method (XFEM), and (II) a discrete damage zone model for quasi-static and fatigue delamination in composites. The first method improves …
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Modeling and Simulation of Random Processes and Fields in Civil Engineering and Engineering Mechanics
… and analyzing heterogeneous materials using the eXtended Finite Element Method (XFEM) with arbitrarily shaped inclusions. A novel enrichment function, which can model arbitrarily shaped inclusions within the framework of XFEM, is proposed. The internal boundary of an arbitrarily shaped inclusion …
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Fretting Fatigue Characterization of Steel Bolted Connections
… surface finish). Both experimental and numerical methods were employed. Experimentally, small-scale fretting fatigue tests were conducted on a total of 52 double lap bolted specimens under different combinations of bolt preload (90 kN and 145 kN), surface finish type (Class A and Class B) and …
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Crack path selection and shear toughening effects due to mixed mode loading and varied surface properties in beam-like adhesively bonded joints
… in the subsequent studies where the numerical method was applied to bonded joints. In adhesively bonded joints, crack propagation and joint failure can potentially result from or involve interactions of a growing crack with a partially weakened interface, so numerical simulations were initiated …
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A generalized finite element method for the simulation of non-planar three-dimensional hydraulic fracture propagation
… In the oil and gas industry, it is a preferred method to enhance the recovery of hydrocarbons by creation of permeable pathways. A successful hydraulic fracturing treatment may increase the production tens of times, making the technique economically attractive. Yet, there are concerns about the …
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Improved conditioning and accuracy of a two-scale generalized finite element method for fracture mechanics
… structures require accurate response prediction methodologies. The efficacy of the Generalized/eXtended Finite Element Method (GFEM or XFEM) in solving problems involving cracks, material interfaces or localized stress concentrations in large, complex, three-dimensional domains has been well …