Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"interface element"”.
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Modeling, Identification and Simulation of Dynamics of Structures With Joints and Interfaces
… dynamic impact and friction, a general joint interface element is also developed. Here, segment-to-segment contact (SSC) is considered, and contact effects are accounted for along continuous edges of the elements. Thus, micro-scale stick-slip behavior along the joint interfaces can be captured …
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Dynamic Fracture of Adhesively Bonded Composite Structures Using Cohesive Zone Models
… surface 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 …
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Geometric and Material Nonlinear Analysis of Three-Dimensional Soil-Structure Interaction
A finite element procedure is developed for stress-deformation analysis of three-dimensional solid bodies including geometric and material nonlinearities. The formulation also includes the soil-structure interaction effect by using an interface element. A scheme is formulated to allow consistent …
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A computational framework for dynamic soil-structure interaction analysis
… Based on this framework, a prototype finite element program (SAND) has been developed implementing an iterative direct solution scheme, and a new kind of efficient interface element has been derived. Illustrative examples have been presented to verify the implementation of the prototype and …
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A hybrid finite element procedure for soil-structure interaction including construction sequences
An alternative to the displacement finite element method, the hybrid stress model, is applied to problems in geomechanics. A two-dimensional finite element procedure based on the hybrid stress model is developed for simulation of construction sequences including underground and surface excavations. …
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ZeroN : mid-Air tangible interaction enabled by computer controlled magnetic levitation
… scenarios, we developed ZeroN, a new tangible interface element that can be levitated and moved freely by computer in a three dimensional space. In doing so, ZeroN serves as a tangible representation of a 3D coordinate of the virtual world through which users can see, feel, and control …
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A novel discrete damage zone model and enhancement of the extended finite element method for fracture mechanics problems
… 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 XFEM when applied to general nonlinear materials when crack tip analytical solutions are not available. …
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Exploring Immersed FEM, Material Design, and Biological Tissue Material Modeling
This thesis utilizes the Immersed Interface Finite Element Method (IIFEM) for shape optimization and material design, while also investigating the modeling and parameterization of lung tissue for Diver Underwater Explosion (UNDEX) simulations. In the first part, a shape optimization scheme …
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Fatigue behaviour of CFRP-repaired corroded RC beams
… bar at the cracks. Also in this study, a finite element (FE) model is developed for concrete beams repaired using FRP. Existing constitutive models were adapted and included in the FE program RECAP for the modelling of fatigue behaviour of the concrete and steel reinforcing bars. The concrete was …
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Design, Analysis, and Application of Immersed Finite Element Methods
… consists of three studies of immersed finite element (IFE) methods for inter- face problems related to partial differential equations (PDEs) with discontinuous coefficients. These three topics together form a continuation of the research in IFE method including the extension to elasticity …
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Simulation of deformation and fracture in very large shell structures
… computational solid mechanics, structural elements remain essential in the practical design of very large thin structures such as aircraft fuselages, ship hulls, automobiles, submarines, and pressure vessels. In many applications, fracture is a critical design concern, and thus the ability …
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Numerical simulation of implant-bone interaction following cementless joint replacement
… interfacial fibrous tissue layer. In addition, interface strains will influence the early repair process and guide long term bone remodelling within this region. A numerical model for the prediction of bone formation within the porous surface has been developed. The evolution laws consider the …
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Continuum modeling of electro-chemo-mechanical phenomena in all-solid-state batteries
… interphase formation at the anode/SSE interface and damage of the various phases in composite electrodes. Computational modeling for SSBs is at its infancy and constitutes the focus of this thesis, with an emphasis on mechanical integrity of composite electrodes and deposition-induced …
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Analytical Modeling of the Mechanics of Nucleation and Growth of Cracks
… to describe the contact-friction behavior. Interface elements applicable to two dimensional and three dimensional analyses are formulated for the analyses of contact, friction, and delamination problems. The consistent form of the interface element internal force vector and the tangent …
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From some obscurity to clarity in Boom clay behavior: Analysis of its coupled hydro-mechanical response in the presence of strain localization
… model, within the LAGAMINE finite element code. This development overcomes the inconveniences associated to using a constant dilatancy angle, for instance encountered in our numerical simulations of some laboratory small-scale tests as well as a large-scale excavation. This study …
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Bond between reinforcing bars and concrete under impact loading
… distributions in the concrete, the slips at the interface between the rebar and the concrete, and the crack development. It was also found that there is always higher bond resistance for push-in loading than for pull-out loading. The bond resistance and the fracture energy in bond failure …
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Development of an extended hyperbolic model for concrete-to-soil interfaces
… a vertical shear force at the soil-to-wall interface. This vertical shear force, or downdrag, is beneficial for the stability of the structure. A significant reduction in construction costs may result if the downdrag is accounted for during design. This potential reduction in costs is …
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Micromecánica de elastómeros porosos y reforzados con fibras
… realizaron varios remallados de los modelos de elementos finitos para alcanzar altas deformaciones en el caso de los materiales con matriz neo-Hookeana. Como resultado de las simulaciones se ha concluido que el modelo de homogeneización de segundo orden mejorado con las fluctuaciones de campo …