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Showing 1 to 20 of 36 for “"Finite Element Model (FEM)"”.
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Computational fluid dynamics of water vapor/ Zeolite 13X adsorption
This work describes the development of a Finite Element Model (FEM) for use in determining adsorption system performance. The considered interactions are between Zeolite 13X and water vapor for the purposes of engineering adsorbent characteristics and harvester device characteristics. Four …
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Modelling material behavior for additively manufactured metals and polymers produced by fused filament fabrication
… strength of FFF parts. To achieve this, a Finite Element Model (FEM) was developed, incorporating an anisotropic stiffness matrix with material constants obtained through experimental methods.
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Optimization of a roll over protective structure (ROPS) using nonlinear finite element analysis
… first objective deals with the development of a finite element model (FEM) of the original deployable ROPS giving analytical results that matched the experimental results. This justified the use of a FEM to optimize the ROPS. Once this was accomplished, a FEM of an optimized deployable ROPS was …
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Feasibility Study Of Evaluating Durability Of Cfrp-strengthened Beams Using In-situ Load Test
… actual condition of the CFRP. A 3-dimensional Finite Element Model (FEM) was utilized to assess the load-deflection behavior of the bridge. An analytical study was used to evaluate the effective moment of inertia of the strengthened beams modeled on the FEM. The results indicate that the …
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Wave propagation in finite element and mass-spring-dashpot lattice models
Numerical efficiency comparisons of a four-node finite element model (FEM), a mass-spring lattice model (MSLM), and a mass-spring-dashpot lattice model (MSDLM) are investigated. Specifically, the error in the ultrasonic phase speed with variations in Poisson's ratio and angle of incidence is …
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Wave propagation in finite element and mass-spring-dashpot lattice models
Numerical efficiency comparisons of a four-node finite element model (FEM), a mass-spring lattice model (MSLM), and a mass-spring-dashpot lattice model (MSDLM) are investigated. Specifically, the error in the ultrasonic phase speed with variations in Poisson's ratio and angle of incidence is …
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Finite Element Model Validation and Testing of an Off-Road Vehicle under Dynamic Loading Conditions
… loads and constraints. Using these conditions, a Finite Element Model (FEM) can be employed to accurately predict the effects of the loading conditions in the components. During the initial design of the front suspension, one major load case was determined to be the main failure load. However, …
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The effects of layer deposition angle and layer temperature on the orthotropic mechanical properties of 3D printed PLA parts
… to derive a transversely isotropic, theoretical model based on classical laminate theory and the Tsai-Hill’s failure criteria at each temperature, and were implemented in a finite element model (FEM). The FEM captured the overall experimental tensile behavior of both the 100% infill and 40% …
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Pipe circularity reformation via line heating
… generated using a simplified thermo-mechanical model of the pipe validated by a Finite Element Model (FEM).
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Finite Element Model Updating for Rotary Machinery
… of this thesis was to develop a mathematical model that represents a rotary machine. Experimental data was used to define a finite element model (FEM). In order to obtain the experimental data, the rotary machine had to be balanced. An impact hammer test made it possible to obtain frequency …
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Cohesive Zone Modelling of Fiber–Matrix Interface in Composite Materials
… develop a 2D-Axisymmetric single-fiber push-out Finite Element Model (FEM) for Carbon Fiber (CF)/ epoxy composite to study and understand the interface behaviour. The interface is represented using a Cohesive Zone Model (CZM), enabling accurate computation of interface properties. The model is …
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Comparison of Strain Gage and Fiber Optic Sensors On A Sting Balance In A Supersonic Wind Tunnel
… conducted with a blunt, 10º half-angle cone model in the Virginia Tech 9x9 inch Supersonic Wind Tunnel at Mach 2.4 with a total pressure of 48 psia and ambient total temperature of 25.3ºC. Results showed a close comparison between the foil strain gages and the fiber optic sensor …
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Development of ice-bonded ballast in sub-freezing temperatures and its effect on maintenance operations during a winter rail break
… experimental data and Illi3D, a field-validated finite element model (FEM). The laboratory data were transformed into f0 using a novel method developed in this study and then incorporated into Illi3D to simulate single rail breaks and quantify the effect ice-bonded ballast has on rail break gap. …
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Electrical Impedance Tomography/Spectroscopy (EITS): a Code Division Multiplexed (CDM) approach
… and together with the input currents, and a Finite Element Model (FEM) of the object, used to reconstruct an impedance image of the cross-sectional contents of the imaged object. The reconstruction process involves the numerical solutions of the forward problem; using Finite Element solvers …
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Finite Element Modeling Of Tire-Terrain Dynamic Interaction For Full Vehicle Simulation Applications
… of importance. In the latter case, tire dynamic models are used for durability assessment of the vehicle chassis, and should be studied using high fidelity simulation models. In this study, a threedimensional finite element model (FEM) of the 16 inch TMPT Tire has been developed using the …
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New Field Testing Procedure For Measuring Residual Stress in Plain Concrete Pavements and Structures
… stress of the material. Three dimensional Finite Element Model (FEM) analyses of these tests further corroborates the findings suggesting that the residual stresses in plain concrete pavements can be reliably measured.
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Compression After Impact Experiments and Analysis on Honeycomb Core Sandwich Panels with Thin Facesheets
… on the observed failure mode is described. A finite element model (FEM) is developed to simulate the experiments performed in the current study. The purpose of this simulation is to predict the experimental test results, and to conrm the experimental test conclusions. A newly-developed, …
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An Experimental and Analytical Investigation of Floor Vibrations
… The first area of study involved a comparison of finite element models with field tests for a suspended floor system. The suspended floor system underwent several retrofits to determine which retrofit reduced annoying vibrations the most. Comparisons were also made to see how well a finite element …
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Feasibility of Passive Acoustic Detection of Coronary Artery Disease Utilizing Source Separation
… relevant locations within the chest using a 2-D Finite Element Model (FEM) generated from physiologic data. These transfer functions were then used to demonstrate the technique using test cases generated with the FEM. Finally, the vulnerability of the technique to noise was quantified through …
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Seismic Behavior of concrete filled steel Tubular Built-up columns
… design, previous experimental researches, and finite element formulation, is firstly illustrated. Six specimens with different grades of concrete and brace arrangements are designed and tested subjected to cyclic loading. The hysteretic behavior, such as failure mode, deformed shape, …
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