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Journal articles on the topic 'Validated FE models'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Richert, Raphaël, Jean-Christophe Farges, Faleh Tamimi, Naim Naouar, Philippe Boisse, and Maxime Ducret. "Validated Finite Element Models of Premolars: A Scoping Review." Materials 13, no. 15 (2020): 3280. http://dx.doi.org/10.3390/ma13153280.

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Finite element (FE) models are widely used to investigate the biomechanics of reconstructed premolars. However, parameter identification is a complex step because experimental validation cannot always be conducted. The aim of this study was to collect the experimentally validated FE models of premolars, extract their parameters, and discuss trends. A systematic review was performed following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Records were identified in three electronic databases (MEDLINE [PubMed], Scopus, The Cochrane Library) by two indepen

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Completo, A., F. Fonseca, and J. A. Simões. "Finite Element and Experimental Cortex Strains of the Intact and Implanted Tibia." Journal of Biomechanical Engineering 129, no. 5 (2007): 791–97. http://dx.doi.org/10.1115/1.2768382.

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Finite Element (FE) models for the simulation of intact and implanted bone find their main purpose in accurately reproducing the associated mechanical behavior. FE models can be used for preclinical testing of joint replacement implants, where some biomechanical aspects are difficult, if not possible, to simulate and investigate in vitro. To predict mechanical failure or damage, the models should accurately predict stresses and strains. Commercially available synthetic femur models have been extensively used to validate finite element models, but despite the vast literature available on the ch

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Libby, Joseph, Arsalan Marghoub, David Johnson, Roman H. Khonsari, Michael J. Fagan, and Mehran Moazen. "Modelling human skull growth: a validated computational model." Journal of The Royal Society Interface 14, no. 130 (2017): 20170202. http://dx.doi.org/10.1098/rsif.2017.0202.

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During the first year of life, the brain grows rapidly and the neurocranium increases to about 65% of its adult size. Our understanding of the relationship between the biomechanical forces, especially from the growing brain, the craniofacial soft tissue structures and the individual bone plates of the skull vault is still limited. This basic knowledge could help in the future planning of craniofacial surgical operations. The aim of this study was to develop a validated computational model of skull growth, based on the finite-element (FE) method, to help understand the biomechanics of skull gro

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Hashim, Hafizan, Amir Radzi Ab Ghani, and Wahyu Kuntjoro. "Bending Response and Energy Absorption of Closed-Hat-Section Beams." Modern Applied Science 10, no. 11 (2016): 225. http://dx.doi.org/10.5539/mas.v10n11p225.

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Many articles on bending collapse but not limited to closed-hat-section beams have been reported mainly from experimental point of view but less in simulation-based approach. Detailed investigation on critical parameters of closed-hat-section beams to examine their energy absorption capability is also less found in the literature. This paper presents the procedure for development and validation of a finite element (FE) model of a closed-hat-section beam under quasi static three-point bending using an explicit nonlinear FE technique. Developed FE models were validated through comparison with ex

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Karadogan, Celalettin, Patrick Cyron, and Mathias Liewald. "Materialcharakterisierung mittels Künstlicher IntelIigenz/Material characterisation by using machine learning models." wt Werkstattstechnik online 110, no. 10 (2020): 656–60. http://dx.doi.org/10.37544/1436-4980-2020-10-12.

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Die für die FEM (Finite-Elemente-Methode)-Simulation von Blechumformprozessen benötigten validierten Materialparameter können heutzutage durch eine vollflächige optische Messung der Verformung eines Prüfkörpers in Kombination mit einem simulationsbasierten inversen Ansatz ermittelt werden. Dieser inverse Ansatz erfordert jedoch Fachwissen in der FEM-Analyse, Optimierung sowie Programmierung und kann zudem recht zeitaufwendig sein. Vor diesem Hintergrund wird in diesem Beitrag eine auf maschinellem Lernen basierende Methode zur Bestimmung von validierten Materialparametern vorgestellt. &nbs

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Agostinho Hernandez, Bruno, Harinderjit Singh Gill, and Sabina Gheduzzi. "A Novel Modelling Methodology Which Predicts the Structural Behaviour of Vertebral Bodies under Axial Impact Loading: A Finite Element and DIC Study." Materials 13, no. 19 (2020): 4262. http://dx.doi.org/10.3390/ma13194262.

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Cervical spine injuries (CSIs) arising from collisions are uncommon in contact sports, such as rugby union, but their consequences can be devastating. Several FE modelling approaches are available in the literature, but a fully calibrated and validated FE modelling framework for cervical spines under compressive dynamic-impact loading is still lacking and material properties are not adequately calibrated for such events. This study aimed to develop and validate a methodology for specimen-specific FE modelling of vertebral bodies under impact loading. Thirty-five (n = 35) individual vertebral b

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Fan, Wei, Dan Zhao, and Li-Xin Guo. "A finite element model of the human lower thorax to pelvis spinal segment: Validation and modal analysis." Bio-Medical Materials and Engineering 32, no. 5 (2021): 267–79. http://dx.doi.org/10.3233/bme-196017.

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BACKGROUND: Several finite element (FE) models have been developed to study the effects of vibration on human lumbar spine. However, the authors know of no published results so far that have proposed computed tomography-based FE models of whole lumbar spine including the pelvis to conduct dynamic analysis. OBJECTIVE: To create and validate a three-dimensional ligamentous FE model of the human lower thorax to pelvis spinal segment (T12–Pelvis) and provide a detailed simulation environment to investigate the dynamic characteristics of the lumbar spine under whole body vibration (WBV). METHODS: T

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LI, FAN, HONGGENG LI, WEI HU, SICHENG SU, and BINGYU WANG. "SIMULATION OF MUSCLE ACTIVATION WITH COUPLED NONLINEAR FE MODELS." Journal of Mechanics in Medicine and Biology 16, no. 06 (2016): 1650082. http://dx.doi.org/10.1142/s0219519416500822.

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Muscle activation plays an important role in head–neck dynamic response in vehicle accidents, especially in low speed impacts. The aim of the present study was to analyze the mechanical characteristics and dynamic stability of the muscle using coupled non-linear finite element model, which could be further applied for biomechanical study of head–neck system in car crash accidents. A rabbit tibialis anterior (TA) geometry model was developed. Two finite element models of TA were developed with coupled constitutive models. One coupled model was developed combining quasi-linear viscoelastic (QLV)

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Walker, Joseph C., Mark B. Ratcliffe, Peng Zhang, et al. "MRI-based finite-element analysis of left ventricular aneurysm." American Journal of Physiology-Heart and Circulatory Physiology 289, no. 2 (2005): H692—H700. http://dx.doi.org/10.1152/ajpheart.01226.2004.

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Tagged MRI and finite-element (FE) analysis are valuable tools in analyzing cardiac mechanics. To determine systolic material parameters in three-dimensional stress-strain relationships, we used tagged MRI to validate FE models of left ventricular (LV) aneurysm. Five sheep underwent anteroapical myocardial infarction (25% of LV mass) and 22 wk later underwent tagged MRI. Asymmetric FE models of the LV were formed to in vivo geometry from MRI and included aneurysm material properties measured with biaxial stretching, LV pressure measurements, and myofiber helix angles measured with diffusion te

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Qiu, Tian-Xia, Ee-Chon Teo, and Qing-Hang Zhang. "VALIDATION OF FINITE ELEMENT MODELS OF THORACOLUMBAR T11-T12 AND T12-L1 AND COMPARISON OF THEIR BIOMECHANICAL RESPONSES." Journal of Musculoskeletal Research 09, no. 03 (2005): 133–43. http://dx.doi.org/10.1142/s0218957705001576.

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The objective of this study was to build and validate the FE models of thoracolumbar junctional T11-T12 and T12-L1 functional spinal units (FSUs) and compare the biomechanical responses of the two FSUs under physiological loading modes: flexion, extension, lateral bending and axial rotation. Anatomically accurate FE models of thoracolumbar T11-T12 and T12-L1 FSUs were developed and validated against published experimental results in terms of load displacement responses and range of motion (ROM) under flexion and extension pure moments of 7.5 Nm, left and right lateral bending pure moments of 7

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Anderson, Andrew E., Christopher L. Peters, Benjamin D. Tuttle, and Jeffrey A. Weiss. "Subject-Specific Finite Element Model of the Pelvis: Development, Validation and Sensitivity Studies." Journal of Biomechanical Engineering 127, no. 3 (2005): 364–73. http://dx.doi.org/10.1115/1.1894148.

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A better understanding of the three-dimensional mechanics of the pelvis, at the patient-specific level, may lead to improved treatment modalities. Although finite element (FE) models of the pelvis have been developed, validation by direct comparison with subject-specific strains has not been performed, and previous models used simplifying assumptions regarding geometry and material properties. The objectives of this study were to develop and validate a realistic FE model of the pelvis using subject-specific estimates of bone geometry, location-dependent cortical thickness and trabecular bone e

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Koloor, S. S. R., Majid R. Ayatollahi, and M. N. Tamin. "Modeling Interlaminar Shear Crack-Jump Phenomenon in Fiber-Reinforced Polymer Composites." Advanced Materials Research 1125 (October 2015): 74–78. http://dx.doi.org/10.4028/www.scientific.net/amr.1125.74.

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This paper discusses the simulation technique for the development of a validated finite element model to capture the stable shear crack-jump phenomenon in carbon fiber-reinforced polymer composite laminates. The interlaminar cracking process is characterized using a 16-ply unidirectional ([0]16) end-notch flexure (ENF) specimens. Complementary FE models of the test setup are developed to capture the mechanics of the observed interlaminar crack-jump phenomenon. The cohesive interface response is represented by a damage model with bilinear traction-displacement softening law. Close comparison of

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Rusthi, Mohamed, Poologanathan Keerthan, Mahen Mahendran, and Anthony Ariyanayagam. "Investigating the fire performance of LSF wall systems using finite element analyses." Journal of Structural Fire Engineering 8, no. 4 (2017): 354–76. http://dx.doi.org/10.1108/jsfe-04-2016-0002.

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Purpose This research was aimed at investigating the fire performance of LSF wall systems by using 3-D heat transfer FE models of existing LSF wall system configurations. Design/methodology/approach This research was focused on investigating the fire performance of LSF wall systems by using 3-D heat transfer finite element models of existing LSF wall system configurations. The analysis results were validated by using the available fire test results of five different LSF wall configurations. Findings The validated finite element models were used to conduct a parametric study on a range of non-l

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Foti, Dora, Nicola Ivan Giannoccaro, Vitantonio Vacca, and Michela Lerna. "Structural Operativity Evaluation of Strategic Buildings through Finite Element (FE) Models Validated by Operational Modal Analysis (OMA)." Sensors 20, no. 11 (2020): 3252. http://dx.doi.org/10.3390/s20113252.

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In this paper, a non-destructive technique based on the monitoring of the environmental vibrations of two strategic buildings by positioning accelerometers in well-defined points was used for fixing their dynamic behavior. The accelerometers measurements were elaborated through Operational Modal Analysis (OMA) techniques, in order to identify natural frequencies, damping coefficients, and modal shapes of the structure. Once these parameters have been determined, a numerical model calibrated on the identified frequencies and verified on the corresponding mode shapes was created for each buildin

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Tan, Qinghua, Leroy Gardner, and Linhai Han. "Performance of Steel-Reinforced Concrete-Filled Stainless Steel Tubular Columns at Elevated Temperature." International Journal of Structural Stability and Dynamics 19, no. 01 (2018): 1940002. http://dx.doi.org/10.1142/s0219455419400029.

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Steel-reinforced concrete-filled stainless steel tubular (SRCFSST) columns combine the advantages of concrete-filled stainless steel tubular (CFSST) columns and steel-reinforced concrete (SRC) columns, resulting in excellent corrosion resistance, good economy, good ductility, and excellent fire resistance. Thus, SRCFSST columns have many potential structural engineering applications, especially in offshore structures. The performance of SRCFSST columns at elevated temperatures is investigated by finite element (FE) analysis in this paper. Firstly, FE models capable of capturing the full load-d

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Remus, Robin, Andreas Lipphaus, Marc Neumann, and Beate Bender. "Calibration and validation of a novel hybrid model of the lumbosacral spine in ArtiSynth–The passive structures." PLOS ONE 16, no. 4 (2021): e0250456. http://dx.doi.org/10.1371/journal.pone.0250456.

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In computational biomechanics, two separate types of models have been used predominantly to enhance the understanding of the mechanisms of action of the lumbosacral spine (LSS): Finite element (FE) and musculoskeletal multibody (MB) models. To combine advantages of both models, hybrid FE-MB models are an increasingly used alternative. The aim of this paper is to develop, calibrate, and validate a novel passive hybrid FE-MB open-access simulation model of a ligamentous LSS using ArtiSynth. Based on anatomical data from the Male Visible Human Project, the LSS model is constructed from the L1-S1

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Gutaj, F. "A comparison of methods for modelling the dynamics of a cricket bat." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 218, no. 12 (2004): 1457–68. http://dx.doi.org/10.1243/0954406042690416.

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The dynamic characteristics of a cricket bat may be quantified using different modelling methods ranging from rigid-body models, flexible beam models, finite element (FE) models and modal models. This paper compares three models of a cricket bat. The first is an experimentally validated FE model. The validation of the FE model is described via correlation and mapping of results from experimental modal testing to FE calculated results via optimization procedures. Using the methodology described here, the actual bat dynamic characteristics can be identified to a reasonable level. The second and

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Karlsson, Ulf B., Jonas W. Ringsberg, Erland Johnson, Mohammed Hoseini, and Anders Ulfvarson. "Experimental and Numerical Investigation of Bulb Impact with a Ship Side-Shell Structure." Marine Technology and SNAME News 46, no. 01 (2009): 16–26. http://dx.doi.org/10.5957/mtsn.2009.46.1.16.

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The finite element (FE) method is suitable as a numerical tool in the numerical analysis of, for example, ship collision scenarios. It is feasible to simulate and compare different collision scenarios by parameter variations. The objective with this investigation was to establish a reliable and robust FE modeling procedure for ship-ship collision simulations, using the commercial FE software Abaqus/Explicit, by means of parameter sensitivity and experimental analyses. Four types of experiments are presented that have supported the development of the FE models and simulations with sufficient in

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Chowdhury, Md Arman, Md Mashfiqul Islam, and Zubayer Ibna Zahid. "Finite Element Modeling of Compressive and Splitting Tensile Behavior of Plain Concrete and Steel Fiber Reinforced Concrete Cylinder Specimens." Advances in Civil Engineering 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/6579434.

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Plain concrete and steel fiber reinforced concrete (SFRC) cylinder specimens are modeled in the finite element (FE) platform of ANSYS 10.0 and validated with the experimental results and failure patterns. Experimental investigations are conducted to study the increase in compressive and tensile capacity of cylindrical specimens made of stone and brick concrete and SFRC. Satisfactory compressive and tensile capacity improvement is observed by adding steel fibers of 1.5% volumetric ratio. A total of 8 numbers of cylinder specimens are cast and tested in 1000 kN capacity digital universal testing

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Jiang, Xu, Chengwei Luo, Xuhong Qiang, Henk Kolstein, and Frans Bijlaard. "Effects of Adhesive Connection on Composite Action between FRP Bridge Deck and Steel Girder." Journal of Engineering 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/6218949.

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The FRP-steel girder composite bridge system is increasingly used in new constructions of bridges as well as rehabilitation of old bridges. However, the understanding of composite action between FRP decks and steel girders is limited and needs to be systematically investigated. In this paper, depending on the experimental investigations of FRP to steel girder system, the Finite Element (FE) models on experiments were developed and analyzed. Comparison between experiments and FE results indicated that the FE models were much stiffer for in-plane shear stiffness of the FRP deck panel. To modify

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Malladi, Vijaya VN Sriram, Mohammad I. Albakri, Serkan Gugercin, and Pablo A. Tarazaga. "Application of projection-based model reduction to finite-element plate models for two-dimensional traveling waves." Journal of Intelligent Material Systems and Structures 28, no. 14 (2016): 1886–904. http://dx.doi.org/10.1177/1045389x16679295.

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A finite element (FE) model simulates an unconstrained aluminum thin plate to which four macro-fiber composites are bonded. This plate model is experimentally validated for single and multiple inputs. While a single input excitation results in the frequency response functions and operational deflection shapes, two input excitations under prescribed conditions result in tailored traveling waves. The emphasis of this article is the application of projection-based model reduction techniques to scale-down the large-scale FE plate model. Four model reduction techniques are applied and their perform

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Yang, Bin, Kwong-Ming Tse, Ning Chen, et al. "Development of a Finite Element Head Model for the Study of Impact Head Injury." BioMed Research International 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/408278.

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This study is aimed at developing a high quality, validated finite element (FE) human head model for traumatic brain injuries (TBI) prediction and prevention during vehicle collisions. The geometry of the FE model was based on computed tomography (CT) and magnetic resonance imaging (MRI) scans of a volunteer close to the anthropometry of a 50th percentile male. The material and structural properties were selected based on a synthesis of current knowledge of the constitutive models for each tissue. The cerebrospinal fluid (CSF) was simulated explicitly as a hydrostatic fluid by using a surface-

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Griškevičius, Paulius, and Antanas Žiliukas. "THE CRASH ENERGY ABSORPTION OF THE VEHICLES FRONT STRUCTURES." TRANSPORT 18, no. 2 (2003): 97–101. http://dx.doi.org/10.3846/16483840.2003.10414073.

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During the frontal crash the longerons absorb most energy of all vehicles construction elements. In order to analyse the energy absorbing capabilities of longerons under axial compression loading and to evaluate the influence of longerons geometrical characteristics and materials degradation on the vehicles safety experimental investigations and numerical calculations were performed. To assess the crashworthiness of longerons the main objective was to study the behaviour of thin-walled structural elements under axial loading conditions using the Finite Element (FE) model. The numerical FE mode

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Abdelrahman, A. H. A., Siwei Liu, Yao-Peng Liu, and Siu-Lai Chan. "Simulation of Thin-Walled Members with Arbitrary-Shaped Cross-Sections for Static and Dynamic Analyses." International Journal of Structural Stability and Dynamics 20, no. 12 (2020): 2050128. http://dx.doi.org/10.1142/s021945542050128x.

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The main objective of this paper is to validate a finite-element (FE) modeling protocol to simulate thin-walled members for static and dynamic analyses. Arbitrary-shaped cross-sections, including open, closed, and multicellular sections can be efficiently modeled for further advanced study. The framework is thoroughly validated and verified using the existing analytical and closed-form solutions, as well as experimental results available in literature. This work is motivated by the higher accuracy of the shell FE-based modeling to capture the local and global complex behaviors of thin-walled m

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Pitzen, Tobias R., Dieter Matthis, Dragos D. Barbier, and Wolf-Ingo Steudel. "Initial stability of cervical spine fixation: predictive value of a finite element model." Journal of Neurosurgery: Spine 97, no. 1 (2002): 128–34. http://dx.doi.org/10.3171/spi.2002.97.1.0128.

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✓ The purpose of this study was to generate a validated finite element (FE) model of the human cervical spine to be used to analyze new implants. Digitized data obtained from computerized tomography scanning of a human cervical spine were used to generate a three-dimensional, anisotropic, linear C5–6 FE model by using a software package (ANSYS 5.4). Based on the intact model (FE/Intact), a second was generated by simulating an anterior cervical fusion and plate (ACFP) C5–6 model in which monocortical screws (FE/ACFP) were used. Loading of each FE model was simulated using pure moments of ± 2.5

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Talebi, Farzad, and Junji Kiyono. "Comparison of 3D Solid and Beam–Spring FE Modeling Approaches in the Evaluation of Buried Pipeline Behavior at a Strike-Slip Fault Crossing." Energies 14, no. 15 (2021): 4539. http://dx.doi.org/10.3390/en14154539.

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Validated 3D solid finite element (FE) models offer an accurate performance of buried pipelines at earthquake faults. However, it is common to use a beam–spring model for the design of buried pipelines, and all the design guidelines are fitted to this modeling approach. Therefore, this study has focused on (1) the improvement of modeling techniques in the beam–spring FE modeling approach for the reproduction of the realistic performance of buried pipelines, and (2) the determination of an appropriate damage criterion for buried pipelines in beam–spring FE models. For this paper, after the veri

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Polgar, K., H. S. Gill, M. Viceconti, D. W. Murray, and J. J. O'Connor. "Development and numerical validation of a finite element model of the muscle standardized femur." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 217, no. 3 (2003): 165–72. http://dx.doi.org/10.1243/095441103765212668.

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The human femur is one of the parts of the musculo-skeletal system most frequently analysed by means of the finite element (FE) method. Most FE studies of the human femur are based on computed tomography data sets of a particular femur. Since the geometry of the chosen sample anatomy influences the computed results, direct comparison across various models is often difficult or impossible. The aim of the present work was to develop and validate a novel three-dimensional FE model of the human femur based on the muscle standardized femur (MuscleSF) geometry. In the new MuscleSF FE model, the femo

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Li, Guibing, Zheng Tan, Xiaojiang Lv, and Lihai Ren. "A Computationally Efficient Finite Element Pedestrian Model for Head Safety: Development and Validation." Applied Bionics and Biomechanics 2019 (July 24, 2019): 1–13. http://dx.doi.org/10.1155/2019/4930803.

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Head injuries are often fatal or of sufficient severity to pedestrians in vehicle crashes. Finite element (FE) simulation provides an effective approach to understand pedestrian head injury mechanisms in vehicle crashes. However, studies of pedestrian head safety considering full human body response and a broad range of impact scenarios are still scarce due to the long computing time of the current FE human body models in expensive simulations. Therefore, the purpose of this study is to develop and validate a computationally efficient FE pedestrian model for future studies of pedestrian head s

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Daud, Yusof, Margaret Lucas, and Khairur Rijal Jamaludin. "Finite Element Modelling in Ultrasonic Sheet Metal Forming." Advanced Materials Research 445 (January 2012): 3–8. http://dx.doi.org/10.4028/www.scientific.net/amr.445.3.

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Finite element (FE) model of die necking process of an aluminium hollow thin cylinder has been developed. The input parameters of material properties and coefficient of friction, µ for the model have been deducted from our previous experimental study. Later the models have been validated against experimental data as reported in the previous studies. For the die necking process, the FE model has successfully to predict how much the original diameter of the aluminium hollow cylinder can be maximised necked with and without applying ultrasonic vibration. FE models showed that the application of u

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Milch, Jaromír, Jan Tippner, Václav Sebera, and Martin Brabec. "Determination of the elasto-plastic material characteristics of Norway spruce and European beech wood by experimental and numerical analyses." Holzforschung 70, no. 11 (2016): 1081–92. http://dx.doi.org/10.1515/hf-2015-0267.

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Abstract Experimental and numerical analyses are presented concerning of compression tests parallel and perpendicular to the grain, three-point bending, and double-shear joints in compliance with the relevant test standards (ASTM D2395, BS 373, EN 383 and EN 26891). Woods of Norway spruce (Picea abies L. Karst.) and European beech (Fagus sylvatica L.) were tested to describe their non-linear behavior. Elasto-plastic material models were the basis for the finite-element (FE) analyses with the input of own experimental data and those of the literature. The elasto-plastic material model with non-

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Ramezani, Maziar, Stefan Klima, Paul Le Clerc de la Herverie, et al. "In Silico Pelvis and Sacroiliac Joint Motion: Refining a Model of the Human Osteoligamentous Pelvis for Assessing Physiological Load Deformation Using an Inverted Validation Approach." BioMed Research International 2019 (January 9, 2019): 1–12. http://dx.doi.org/10.1155/2019/3973170.

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Introduction. Computational modeling of the human pelvis using the finite elements (FE) method has become increasingly important to understand the mechanisms of load distribution under both healthy and pathologically altered conditions and to develop and assess novel treatment strategies. The number of accurate and validated FE models is however small, and given models fail resembling the physiologic joint motion in particular of the sacroiliac joint. This study is aimed at using an inverted validation approach, using in vitro load deformation data to refine an existing FE model under the same

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Wu, Di, and Jian Min Ge. "Analysis of the Influence of Racks on High Speed Train Interior Noise Using Finite Element Method." Applied Mechanics and Materials 675-677 (October 2014): 257–60. http://dx.doi.org/10.4028/www.scientific.net/amm.675-677.257.

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In this paper, the finite element (FE) method was used for simulation of the low-frequency sound field in high speed train compartments. The proposed model was validated using experimental results. The FE models of the train compartments with and without racks were established respectively, and the sound pressure level of the standard point and sound field distribution in these two cases were compared. The results showed that the A-weighted sound pressure level of the standard point was 1.2 dB lower when there is no rack in the compartment.

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EL-HACHA, R., P. ZANGENEH, and H. Y. OMRAN. "FINITE ELEMENT MODELING OF STEEL-CONCRETE COMPOSITE BEAMS STRENGTHENED WITH PRESTRESSED CFRP PLATE." International Journal of Structural Stability and Dynamics 12, no. 01 (2012): 23–51. http://dx.doi.org/10.1142/s0219455412004598.

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Results from finite element modeling (FEM) of large-scale steel-concrete composite beams strengthened in flexure with prestressed carbon fiber-reinforced polymer (CFRP) plate were validated with experimental results and presented in this paper. The effect of varying the level of prestressing as percentage of the ultimate tensile strength of the CFRP plate was investigated. Comparison was carried out in terms of overall load-deflection behavior, strain profile along the length of the CFRP plate, and strain distribution across the depth of the beam at mid-span section. Very good agreement was ob

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Robins, P. J., J. W. Bishop, and S. A. Austin. "Early-age finite element modelling of industrial ground floors." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 217, no. 4 (2003): 295–308. http://dx.doi.org/10.1177/146442070321700406.

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A series of finite element (FE) models of ground floor slab behaviour has been developed and validated against in situ data from site instrumentations. Good agreement was obtained for thermal flow models, and the negative impact of air movement over the top of the slab has been highlighted. Plane stress models of slabs exposed to uniform and differential thermal gradients representing hydration and shrinkage effects demonstrated that the stresses resulting from frictional restraint are significantly less than those caused by warping restraint, even though the latter are currently not considere

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Jang, Seong-Wook, Young-Jin Seo, Yon-Sik Yoo, and Yoon Sang Kim. "Computed Tomographic Image Analysis Based on FEM Performance Comparison of Segmentation on Knee Joint Reconstruction." Scientific World Journal 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/235858.

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The demand for an accurate and accessible image segmentation to generate 3D models from CT scan data has been increasing as such models are required in many areas of orthopedics. In this paper, to find the optimal image segmentation to create a 3D model of the knee CT data, we compared and validated segmentation algorithms based on both objective comparisons and finite element (FE) analysis. For comparison purposes, we used 1 model reconstructed in accordance with the instructions of a clinical professional and 3 models reconstructed using image processing algorithms (Sobel operator, Laplacian

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Budiarsa, I. Nyoman, and Mikdam Jamal. "P-h Curves and Hardness Value Prediction for Spherical Indentation Based on the Representative Stress Approach." Applied Mechanics and Materials 493 (January 2014): 628–33. http://dx.doi.org/10.4028/www.scientific.net/amm.493.628.

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In this work, finite element (FE) model of spherical indentation has been developed and validated. The relationships between constitutive materials parameters (σy and n) of elastic-plastic materials, indentation P-h curves and hardness on spherical indenters has been systematically investigated by combining representative stress analysis and FE modelling using steel as a typical model material group. Parametric FE models of spherical indentation have been developed. Two new approaches to characterise the P-h curves of spherical indentation have been developed and evaluated. Both approaches wer

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Zheng, Jiajia, Liang Tang, and Jingwen Hu. "A Numerical Investigation of Risk Factors Affecting Lumbar Spine Injuries Using a Detailed Lumbar Model." Applied Bionics and Biomechanics 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/8626102.

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Recent field data showed that lumbar spine fractures occurred more frequently in late model vehicles than early ones in frontal crashes. However, the lumbar spine designs of the current crash test dummies are not accurate in human anatomy and have not been validated against any human/cadaver impact responses. In addition, the lumbar spines of finite element (FE) human models, including GHBMC and THUMS, have never been validated previously against cadaver tests. Therefore, this study developed a detailed FE lumbar spine model and validated it against cadaveric tests. To investigate the mechanis

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Sai, V. S., M. R. S. Satyanarayana, V. B. K. Murthy, G. S. Rao, and A. S. Prasad. "An Experimental Simulation to Validate FEM to Predict Transverse Young’s Modulus of FRP Composites." Advances in Materials Science and Engineering 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/648527.

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Finite element method finds application in the analysis of FRP composites due to its versatility in getting the solution for complex cases which are not possible by exact classical analytical approaches. The finite element result is questionable unless it is obtained from converged mesh and properly validated. In the present work specimens are prepared with metallic materials so that the arrangement of fibers is close to hexagonal packing in a matrix as similar arrangement in case of FRP is complex due to the size of fibers. Transverse Young’s moduli of these specimens are determined experimen

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Faridi, A., A. Golian, A. Heravi Mousavi, and J. France. "Bootstrapped neural network models for analyzing the responses of broiler chicks to dietary protein and branched chain amino acids." Canadian Journal of Animal Science 94, no. 1 (2014): 79–85. http://dx.doi.org/10.4141/cjas2013-078.

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Faridi, A., Golian, A., Heravi Mousavi, A. and France, J. 2014. Bootstrapped neural network models for analyzing the responses of broiler chicks to dietary protein and branched chain amino acids. Can. J. Anim. Sci. 94: 79–85. Reliable prediction of avian responses to dietary nutrients is essential for planning, management, and optimization activities in poultry nutrition. In this study, two bootstrapped neural network (BNN) models, each containing 100 separated neural networks (SNN), were developed for predicting average daily gain (ADG) and feed efficiency (FE) of broiler chicks in response t

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Kwasniewski, L., E. Szmigiera, and M. Siennicki. "Finite Element Modeling of Composite Concrete-Steel Columns / Numeryczne Modelowanie Zespolonych Słupów Stalowo-Betonowych." Archives of Civil Engineering 57, no. 4 (2011): 373–88. http://dx.doi.org/10.2478/v.10169-011-0027-z.

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Abstract This paper presents the numerical part of the research program on concrete-filled steel columns. Nonlinear, three dimensional FE analysis of axial compression, was conducted using the finite element program ABAQUS. The numerical results were validated through comparison with experimental data in terms of ultimate loading and deformation modes. Modeling related problems such as the definition of boundary conditions, imperfections, concrete-steel interaction, material representation and others are investigated using a comprehensive parametric study. The developed FE models will be used

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WANG, HONGXIN, XIAOXIONG ZHA, and JIANQIAO YE. "DYNAMIC RESPONSE OF METALLIC SANDWICH PANELS UNDER BLAST LOADINGS." International Journal of Structural Stability and Dynamics 12, no. 03 (2012): 1250017. http://dx.doi.org/10.1142/s0219455412500174.

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An energy-balance-based analytical method and finite element (FE) simulations were developed in this paper to study the dynamic response of metallic sandwich panels subject to blast loadings. The analytical model can be used to predict approximately the deflection of the panels, while the FE model can take into account fluid–structure interactions and the effect of strain rate. Both models were validated by comparing their predictions with the test results available in the literature. Parametric studies were then carried out to assess various factors that are influential in characterizing the

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Sasmal, Saptarshi, and S. Kalidoss. "Nonlinear FE simulations of structural behavior parameters of reinforced concrete beam with epoxy-bonded FRP." Journal of the Mechanical Behavior of Materials 24, no. 1-2 (2015): 35–46. http://dx.doi.org/10.1515/jmbm-2015-0004.

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AbstractIn the present study, investigations on fiber-reinforced plastic (FRP) plated-reinforced concrete (RC) beam are carried out. Numerical investigations are performed by using a nonlinear finite element analysis by incorporating cracking and crushing of concrete. The numerical models developed in the present study are validated with the results obtained from the experiment under monotonic load using the servo-hydraulic actuator in displacement control mode. Further, the validated numerical models are used to evaluate the influence of different parameters. It is found from the investigatio

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Liu, Chengsong, Xiaoqin Liu, Xiaoliu Yang, Hua Zhang, and Ming Zhong. "Kinetics of MgO Reduction in CaO-Al2O3-MgO Slag by Al in Liquid Fe." Metals 9, no. 9 (2019): 998. http://dx.doi.org/10.3390/met9090998.

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Kinetics analysis without fully taking into account the effect of mass transport in slag phase on MgO reduction by Al in liquid steel would lead to overestimation of Mg pickup by steel and driving force of the reaction. Two rate models considering mass transport in (a) steel melt phase only (single control model) and (b) steel and slag melt phases (mixed control model) were developed for evaluating the thermodynamic equilibria between CaO-Al2O3-MgO slags and Al-killed steels. Calculated results from the two models were compared and then validated by equilibrium experiments between a CaO-Al2O3-

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Karuppannan Gopalraj, Sankar, and Timo Kärki. "A Finite Element Study to Investigate the Mechanical Behaviour of Unidirectional Recycled Carbon Fibre/Glass Fibre–Reinforced Epoxy Composites." Polymers 13, no. 18 (2021): 3192. http://dx.doi.org/10.3390/polym13183192.

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Recycled carbon fibre–reinforced epoxy (rCF/EP) composites and recycled glass fibre–reinforced epoxy (rGF/EP) composites were numerically investigated to examine their mechanical properties, such as uniaxial tensile and impact resistance, using finite element (FE) methods. The recycled composites possess unidirectional, long and continuous fibre arrangements. A commercially available Abaqus/CAE software was used to perform an explicit non-linear analysis with a macroscale modelling approach, assuming the recycled composites as both homogenous and isotropic hardening. Five composite types were

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Podusenko, Albert, Wouter M. Kouw, and Bert de Vries. "Message Passing-Based Inference for Time-Varying Autoregressive Models." Entropy 23, no. 6 (2021): 683. http://dx.doi.org/10.3390/e23060683.

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Time-varying autoregressive (TVAR) models are widely used for modeling of non-stationary signals. Unfortunately, online joint adaptation of both states and parameters in these models remains a challenge. In this paper, we represent the TVAR model by a factor graph and solve the inference problem by automated message passing-based inference for states and parameters. We derive structured variational update rules for a composite “AR node” with probabilistic observations that can be used as a plug-in module in hierarchical models, for example, to model the time-varying behavior of the hyper-param

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Phuntsok, Rinchen, Chase W. Provost, Andrew T. Dailey, Douglas L. Brockmeyer, and Benjamin J. Ellis. "The atlantoaxial capsular ligaments and transverse ligament are the primary stabilizers of the atlantoaxial joint in the craniocervical junction: a finite element analysis." Journal of Neurosurgery: Spine 31, no. 4 (2019): 501–7. http://dx.doi.org/10.3171/2019.4.spine181488.

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OBJECTIVEPrior studies have provided conflicting evidence regarding the contribution of key ligamentous structures to atlantoaxial (AA) joint stability. Many of these studies employed cadaveric techniques that are hampered by the inherent difficulties of testing isolated-injury scenarios. Analysis with validated finite element (FE) models can overcome some of these limitations. In a previous study, the authors completed an FE analysis of 5 subject-specific craniocervical junction (CCJ) models to investigate the biomechanics of the occipitoatlantal joint and identify the ligamentous structures

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Pérez-Aracil, J., A. M. Hernandez-Díaz, J. F. Jiménez-Alonso, and F. J. Puerta-Lopez. "Fatigue Assessment of a Slender Footbridge Based on an Updated Finite Element Model." Key Engineering Materials 774 (August 2018): 589–94. http://dx.doi.org/10.4028/www.scientific.net/kem.774.589.

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Finite element model updating is a well-known technique to better characterize the real behaviour of civil engineering structures. The updated numerical model can be used to perform a more accurate structural assessment. Herein, its effectiveness is validated through the fatigue assessment of a lively footbridge considering two different numerical models: (i) a preliminary finite element (FE) model and (ii) an updated version of the preliminary model based on the modal parameters of the footbridge identified experimentally. For this purpose, the Malecon footbridge (Murcia, Spain) has been cons

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Ma, Zhongcheng, Jarmo Havula, and Markku Heinisuo. "Numerical analysis of steel columns stabilized by sandwich panels." Rakenteiden Mekaniikka 50, no. 2 (2017): 97–113. http://dx.doi.org/10.23998/rm.65309.

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Two different types of finite element models to simulate the steel columns supported by sandwich panels are developed in this paper and validated by the full-scale tests by Hedman-Petursson (2001) at ambient temperature. The bracing forces in self-drilling screws, the effect of connections in horizontal joints, effects of the lateral stiffness of self-drilling screws are studied using the developed FE models. Effect of different configurations of loading eccentricity on the buckling resistances of steel columns supported by sandwich panels are further analyzed in this paper.

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Shanmugam, Balaji, Manikandan Palanisamy, Paul O. Awoyera, Senthilnathan Chinnasamy, and Mahalakshmi Subramaniam. "A Study on the Effect of Hollow Tubular Flange Sections on the Behavior of Cold-Formed Steel Built-Up Beams." Advances in Civil Engineering 2021 (September 27, 2021): 1–9. http://dx.doi.org/10.1155/2021/4482887.

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This paper deals with a study conducted on flexural behavior of cold-formed steel built-up I-beams with hollow tubular flange sections. There were two types of test sections, namely, built-up sections that were assembled with either stiffened or unstiffened channels coupling back-to-back at the web and a hollow tubular rectangular flange at the top and bottom of the web to form built-up I-beam. The flexural behavior along with the strength and failure modes of the built-up sections was examined using the four-point loading system. Nonlinear finite element (FE) models were formulated and valida

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BOCCACCIO, A., L. LAMBERTI, C. PAPPALETTERE, and L. QUAGLIARELLA. "ACCURACY OF FINITE ELEMENT PREDICTIONS ON BONE/IMPLANT INTERFACE CONTACT PRESSURES FOR MODELS RECONSTRUCTED FROM CT SCANS." Journal of Mechanics in Medicine and Biology 08, no. 02 (2008): 161–82. http://dx.doi.org/10.1142/s0219519408002589.

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Finite element (FE) simulations can be utilized to predict contact pressures at the bone/implant interface as well as to identify the position and shape of the contact region. However, the accuracy and reliability of FE models of the bone/implant interface reconstructed from tomographic images may be affected by a number of factors such as the presence of image artifacts, the magnitude of geometric errors made in the reconstruction process, the type of boundary and loading conditions hypothesized in the model, the nonlinear solver utilized for computing the contact pressure distribution, and t

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