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Showing 1 to 20 of 23 for “"beam finite element"”.
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Advanced beam finite element models with warping and bond-slip for concrete structures: addressing objectivity issues, prestressing and time-dependent effects [Modelli avanzati di elementi di trave con warping e bond-slip per strutture in calcestruzzo: analisi dei problemi di oggettività, precompressione ed effetti dipendenti dal tempo]
Questa tesi indaga formulazioni avanzate di elementi finiti di trave per l’analisi non lineare di telai in calcestruzzo armato (RC), precompresso (PC) e compositi, con l’obiettivo di migliorare l’accuratezza numerica e meccanica mantenendo al contempo un’elevata efficienza computazionale. Il lavoro …
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A Structural Optimization Scripted Software System
… optimization problems with small and large-scale finite element models. The approach for solving the structural optimization problems of small-scale finite element models consists of the gradient-based optimization method and input file regeneration program. The small-scale structural optimization …
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Background for finite element analysis and experimental testing of glued-laminated space beams
… and one curved Southern Pine glued-laminated beams are subjected to bending, bending and compression, and biaxial bending. The beams are tested at service loads and only one beam is loaded to failure. The analysis is performed by using the finite element program ABAQUS. The 3-D beam finite …
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A multi-scale model integrating both global ring pack behavior and local oil transport in internal combustion engines
… ring-groove and ring-liner interfaces. A curved beam finite element method was adopted to calculate the ring structural response to interaction between the ring and the liner as well as the ring and the groove. Compared to a traditional straight beam finite element method, the curved beam …
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Intricate dynamics and hydrodynamic frictional losses of the piston-ring assembly in internal combustion engines
… using a multi-body dynamic approach. Curved beam Finite Element method for Timoshenko beams was used to account for the longitudinal and in-plane transverse deformations of the rings. Furthermore, the interaction between piston skirt, ring running surface, and the lubricating oil film was …
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Nonlinear Stability Analysis of Frame-Type Structures with Random Geometric Imperfections Using a Total-Lagrangian Finite Element Formulation
… of a three-dimensional total Lagrangian beam finite element that is used to determine the critical load for the structure. The second part deals with a least squares method for modeling the random initial imperfections using the mo de shapes from a linear buckling analysis, and a …
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The theory of anisotropic thin- and thick-walled closed cross-section beams with coupled elastic deformations
… and accurate anisotropic closed-section beam theory has been developed for both thin- and thick-walled composite beams. In this theory transverse shear effects, both of the cross-section and of the beam walls, are taken into account. Torsional warping, both free and constrained as well as …
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Conceptual design of a deployable vehicular bridge structure using shape and geometric optimization for post disaster relief applications
… Given the particularity of SLE units, a standard finite element analysis method was enriched to match our conditions and enhance the accuracy of the modeling and analysis. This includes the implementation of master/slave node constraints and zero length rotational springs at the element nodes. The …
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Energy Absorption and Progressive Failure Response of Composite Fuselage Frames
… two of the J-section frames are compared with a beam finite element analysis using the computer code ABAQUS. Effective elastic moduli for the textile material are obtained from the computer code TEXCAD. The ABAQUS results correlate reasonably well with the experimental results prior to the first …
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Finite element formulation of a thin-walled beam with improved response to warping restraint
… theory of torsion and flexure of thin-walled beams as developed by Vlasov and Timoshenko respectively are well known and commonly used in everyday engineering practice. However there are noticeable differences between calculations and experimental results. The difference is partly due to one …
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Experimental investigation of a novel finite element model for Southern pine glulam beams
… laminae running parallel to each other. Glulam beams of many sizes, shapes, and thicknesses can be made. Innovative load-carrying structures such as lattice domes, bridges, and towers can be built using glulam members. But, since wood is a highly variable and anisotropic material it is often …
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Three-dimensional analysis of steel frames and subframes in fire.
… and equal end-moments. A three-dimensional finite element model has subsequently been developed for the analysis of frames in fire conditions. This model is based on a beam finite element with a single node at each end of the element. At each node eight degrees of freedom are introduced. The …
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A multi-scale model for piston ring dynamics, lubrication and oil transport in internal combustion engines
… performance. To do so a multi-scale curved beam finite element model of piston ring is developed. It is built to couple ring deformation, dynamics and contact with the piston and the cylinder. Oil flow at the interfaces between the ring and the cylinder liner and between the ring and the …
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Frequency estimation of pre-stressed and composite floors
… used for static or dynamic analyses is the finite element method because it can conveniently model the three dimensional nature of structures and account for the various boundary conditions and material properties. The research reported in this thesis consists of measuring fundamental …
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Characterization of behavior of steel-concrete composite members and frames with applications for design
… A three-dimensional distributed plasticity beam finite element formulation suitable for nonlinear static and dynamic analyses of steel-concrete composite frames has been developed. The formulation is suitable for both concrete-filled steel tubes (CFT) and steel reinforced concrete (SRC) …
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Lateral Torsional Buckling of Built-Up Beams
Built-up timber beams are composed of multiple thin plies of equal depth, mechanically connected along their vertical interfaces using discrete fasteners to provide partial composite action. These beams are increasingly used in modern timber structures because thin plies are more economical and …
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Effect of Compressive Force on Aeroelastic Stability of a Strut-Braced Wing
… stability of the SBW using efficient structural finite element and aerodynamic lifting surface methods. A procedure is developed to generate wing stiffness distribution for detailed and simplified wing models and to include the compressive force effect in the SBW aeroelastic analysis. A …
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Advanced Structural Concepts and Simulation for Aircraft Design & Production
L'abstract è presente nell'allegato / the abstract is in the attachment
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Objective 1D beam FE-formulations for the analysis of deployable pantographic structures
La tesi è dedicata alla formulazione di elementi finiti travi di grado elevato, adatti all'analisi statica di strutture a configurazione variabile (deployable structures) la cui apertura si basa su meccanismi pantografici elastici e/o rigidi. Questi sistemi sono soggetti a deformazioni molto …
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Řešení modelů konstrukcí pomocí metody konečných prvků
Práce se zabývá analýzou rovinných konstrukcí pomocí metody konečných prvků. Pro provedení výpočtů potřebných k analýze prutovým a rovinným čtyřuzlovým konečným prvkem jsou v rámci práce vytvořeny programy v systému Matlab. S jejich využitím je pak analyzována nosná mostní konstrukce o sedmi …
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