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Showing 1 to 20 of 425 for “"finite element models"”.
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An evaluation of finite element models of stiffened plates
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2001.
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Structural shape optimization of three dimensional finite element models
… shape optimization program which analyzes models made up of linear isoparametric elements. The goal of the program is to achieve a near uniform model stress state and thereby to minimize material volume. The algorithm is iterative, and performs two analyses per iteration. The first analysis …
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Identification of parametric finite-element models using experimental modal data
A general parametric form of a dynamic finite-element model of a linear elastic structure with small deformations is presented, with the model consisting of a set of scalar parameters multiplying element kernel matrices. The parameters of the finite-element model can represent stiffness and inertia …
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Finite element models for predicting crack growth characteristics in composite materials
… and quasi-three dimensional, linear elastic finite element models for the prediction of crack growth characteristics, including crack growth direction, in laminated composite materials are presented. Mixed-mode crack growth in isotropic materials, unidirectional and laminated composites is …
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Stress Wave Scattering in Concrete: An Investigation Through Simple Finite Element Models
… concretelike materials through the use of simple finite element models in two dimensions. The method employs a correction to account for losses due to normal radiation pattern effects and test setup geometry. Among the test samples for which results appear are models of various thicknesses and …
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Development and Validation of Human Body Finite Element Models for Pedestrian Protection
… accident scenarios. In this study, simplified finite element (FE) models corresponding to 5th percentile female (F05), 50th percentile male (M50), and 95th percentile male (M95) pedestrians were developed and validated in order to investigate the kinetics and kinematics of pedestrians in a …
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Development of Finite Element Models of the Aging Population using Model Morphing Techniques
… age and sex-specific and subject-specific finite element (FE) human body models to accurately model morphology and mechanics for the elderly and obese populations.
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A Bayesian statistics approach to updating finite element models with frequency response data
This dissertation addresses the task of updating finite element models with frequency response data acquired in a structural dynamics test. Standard statistical techniques are used to generate statistically qualified data, which is then used in a Bayesian statistics regression formulation to update …
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An evaluation of component mode synthesis for modal analysis of finite element models
… which is most suitable for large-order finite element models. Two component mode sets are identified as ideally satisfying the basic requirements for inter-component compatibility, high convergence rate, linear independence and completeness. Fixed-interface and free-interface CMS …
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A Comprehensive View of Electrosleep: The History, Finite Element Models and Future Directions
… montages effect the brain. MRI-derived head models that were segmented using an automated segmentation algorithm and manual corrections were solved for four different electrode montages. The montages that were used are as follows: Sponge electrode on left and right eyes (active), Sponge …
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An evaluation of finite element models of stiffened plates subjected to impulsive loading
Different finite element models are evaluated for two very common structures, a cantilever beam and a stiffened plate, subjected to impulsive loading. For the cantilever beam case, the finite element models are one, two or three dimensional models. Various results from the finite element analyses …
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Multiscale finite element models for the analysis, design and optimisation of variable stiffness composites
L'abstract è presente nell'allegato / the abstract is in the attachment
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Performance of microstructural finite element models in predicting the effective modulus of trabecular bone
… through experimental testing or detailed Finite Element modelling. Experimental testing requires a sample to be removed from the body, which is not possible in living patients. As such, there is a drive to move away from experimental testing and focus instead on creating accurate …
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A Formulation for Updating Finite Element Models Through Consistent Use of Laser Vibrometer Data
… physically meaningful 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 …
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An Investigation of the Mechanical Implications of Sacroplasty Using Finite Element Models Based on Tomographic Image Data
… micromotion, thus relieving pain. In this study, finite element models were used to examine the mechanical effects of sacroplasty. Finite element models were constructed from CT images of cadavers on which sacroplasties were performed. The images were used to create the mesh geometry, and to apply …
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An Approach to Using Finite Element Models to Predict Suspension Member Loads in a Formula SAE Vehicle
… the suspension member loads by creating a finite element (FE) model of the entire suspension system. The first stage of this research covers the validation of the current calculation methods. The FE model will replicate the suspension with all of the current assumptions and the member loads …
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Incorporating sensor measurements using data assimilation and machine learning to improve the accuracy of thermal finite element models
… is required. Classically, such high fidelity models would be either physics-based or data-driven, though both of these approaches have disadvantages that may make them unsuitable for application in a digital twin. A hybrid model is a combination of physics-based and data-driven models that …
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Computationally Efficient Finite Element Models of the Lumbar Spine for the Evaluation of Spine Mechanics and Device Performance
<p>Finite Element models of the lumbar spine are commonly used for the study of spine mechanics and device performance, but have limited usefulness in some applications such as clinical and design phase assessments due to long analysis times. In this study a computationally efficient L4-L5 FSU …
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Modeling Vehicle and Rail Vibrations Due to the Passage of High Speed Trains Using Coupled Traveling and Stationary Finite Element Models
… using a time-domain procedure that couples a finite element model of the track and train is detailed. This paper specifically discusses the formulation of the train and track models and their simulation using a coupling scheme. The train model has multiple degrees of freedom, and includes …
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Using finite element models under multiple loading conditions to improve the association between radius and tibia microarchitecture and prevalent osteoporotic vertebral fracture
… fracture is a result of mechanical failure, FE models of these sites in physiologically relevant loading conditions (compression, torsion, bending) may reveal insight into fracture pathogenesis uncaptured by microarchitecture. In this study, HR-pQCT scans at the tibia and radius were collected …
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