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.
Results
Showing 1 to 20 of 168 for “"FE model"”.
-
Development, Calibration, and Validation of a Finite Element Model of the THOR Crash Test Dummy for Aerospace and Spaceflight Crash Safety Analysis
Anthropometric test devices (ATDs), commonly referred to as crash test dummies, are tools used to conduct aerospace and spaceflight safety evaluations. Finite element (FE) analysis provides an effective complement to these evaluations. In this work a FE model of the Test Device for Human Occupant …
-
Bayesian-based Finite Element Model Updating, Damage Detection, and Uncertainty Quantification for Cable-stayed Bridges
… as bridge systems age, understanding the safety and serviceability performance of structural components of these systems through structural health monitoring (SHM) techniques is necessary to achieve economically sustainable maintenance. Application of Bayesian inference in SHM techniques …
-
A finite element study of the human cranium : the impact of morphological variation on biting performance
… mechanics using finite element analysis (FEA). Chapter 1 is a literature review of the relevant background: bone mechanics, jaw-elevator muscle anatomy, imaging techniques, FEA and geometric morphometrics.The second, third and fourth chapters comprise experimental work aiming to provide a …
-
Finite element analysis and design optimisation of shaded pole induction motors
… (SPIMs),much research has been done with different equivalent circuit models, but the results are generally not satisfactory. The emergence of Finite Element (FE) methods provides an opportunity to take a fresh look at the design of SPIMs and this forms the backbone of my …
-
An Approach to Using Finite Element Models to Predict Suspension Member Loads in a Formula SAE Vehicle
… is necessary in order to properly design a safe and effective suspension system. In the past, the Formula SAE team at Virginia Tech has used simplified calculations to determine the loads expected in the suspension members. This approach involves several large assumptions. These assumptions …
-
Shape Optimization of a Sandwich Composite Plate with Low-Velocity Impact Loading and Effect of Finite Difference Sensitivity Analysis
… loading conditions while also considering the safety and comfort of the astronauts. One of the critical load cases in spacesuit design is a low-velocity impact (LVI) which may occur due to tool drop and other similar scenarios. The objectives of this work were (a) to create a finite element (FE) …
-
Finite element model of a tennis ball impact with a racket
<p>Previous authors have produced analytical models which accurately simulate tennis impacts. However, currently there are few published studies on the simulation of tennis impacts using finite-element (FE) technique. The purpose of this study was to produce accurate FE models of tennis impacts, …
-
Development of a Human Tibiofemoral Joint Finite Element Model to Investigate the Effects of Obesity and Knee Malalignment on Joint Contact Pressure
… a varus malaligned knee would have an additive effect on cartilage stress and could cause stress levels to exceed the threshold limit for damage and loss of cartilage matrix.</p> <p>A finite element (FE) model of the human tibiofemoral joint was developed and validated in order to investigate …
-
Analysis and evaluation of a reusable engine packaging system
… data required to validate the Finite Element (FE) model is given. The selection of material properties and boundary conditions for modelling the engine rack prototype was undertaken prior to comparing the FE model with the set of obtained experimental data. Simulated environmental conditions …
-
Explicit Finite Element Modeling of the Human Lumbar Spine
<p>Validated finite element (FE) models of the functional spinal unit (FSU) and lumbar spine are essential in design-phase device development and in assessing the mechanics associated with normal spine function and degenerative disc disease (DDD), as well as the impact of fusion and total disc …
-
Characterization of stresses induced in doweled joints due to thermal and impact loads
… concrete pavement response reveals that the effect of uniform temperature changes was neglected based on the assumption that concrete slabs can contract freely. The triaxial state of stresses that develop at the dowel concrete interfaces due to the application of mechanical and thermal loads …
-
Time-Temperature Curing Relationship of an Adhesive Binder with Rice Straw
Rice straw is a global and proliferate agricultural waste whose production grossly outstrips viable uses. Current disposal methods are not sustainable, and more convenient methods – such as incineration – exude poor environmental stewardship. Although the direct use of straw bales in building …
-
Theoretical and Computational Generalizations on Hyperthermia using Magnetic Nanoparticles including Optimization, Control, and Aggregation
… and cope with aggregation using Finite Element (FE) Modeling and statistical physics. The FE model is first used to demonstrate the advantages of changing IONP heat dissipation in time, which can increase energy density inside tumors while decreasing the energy delivered in healthy tissue. Here, …
-
Electronic Speckle Pattern Interferometry (ESPI) NDE of cracks in pressure vessels with FEA modelling
… to simulate the Electronic Speckle Pattern Interferometric fringe patterns observed around a crack or combination of cracks in a pressure vessel by finite element methods. Electronic Speckle Pattern Interferometry (ESPI) is a coherent optical measurement technique that produces a contour map of …
-
Finite element based modeling of multi-asperity contact and validation of Greenwood-Williamson model
The Greenwood-Williamson (GW) model of contact between rough surfaces is a widely acclaimed model that has been used to predict contact stiffness and other contact parameters. A main limitation of this model is often cited as it is ignoring of asperity interaction effects. This thesis aims to …
-
New Approach to Connections Between Members of Adjacent Box Beam Bridges
… after shear key failure. A finite element (FE) model of one of the tested bridges was developed to study the response of an ABBB with sound joints. The results of the finite element analysis (FEA) were compared with the results of the bridge diagnostic test. Conclusions about the FE model …
-
Modeling and simulation of high pressure composite cylinders for hydrogen storage
… of hydrogen gas for modern hydrogen vehicles. Safety issues arising from the high gas pressure, temperature variation, fire attack, and fracture failures are the main concerns. The focus of this study is to develop a Finite Element (FE) model to predict the performance of composite cylinders …
-
A Formulation for Updating Finite Element Models Through Consistent Use of Laser Vibrometer Data
… parameters in analytical finite element(FE) models using scanning laser Doppler vibrometer(SLDV) dynamic response data. The update formulation is demonstrated in several computer simulations. The formulation is the result of incorporating an analytical FE model into an experimental model. …
-
Investigating the Performance of Wood Portal Frames as Alternative Bracing Systems in Light-Frame Wood Buildings
… varying bracing details. Also, a finite element model was developed and compared with test results from the current study as well as studies by others. It was concluded from the corner joint tests that the maximum moment resistance increased with the addition of metal straps or exterior …
-
Finite element analysis of railway track under vehicle dynamic impact and longitudinal loads
… system and its dependency on track parameters affects the future design of rail fastening system. This thesis focuses on investigating numerically these two problems using finite element (FE) method. An FE model with multiple crossties and their accompanying fastening systems is developed and …
Page 1 of 9