scholarly journals Brain Tissue Constitutive Material Models and the Finite Element Analysis of Blast-Induced Traumatic Brain Injury

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0 ◽  
Author(s):  
A. Eslaminejad ◽  
M. Hosseini Farid ◽  
M. Ziejewski ◽  
G. Karami
Keyword(s):  
Traumatic Brain Injury ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Brain Injury ◽  
Brain Tissue ◽  
Element Analysis ◽  
Material Models ◽  
The Finite Element Analysis ◽  
Constitutive Material

Investigation of Cross-Species Scaling Methods for Traumatic Brain Injury Using Finite Element Analysis

2020 ◽  
Vol 37 (2) ◽  
pp. 410-422 ◽  
Author(s):  
Taotao Wu ◽  
Jacobo Antona-Makoshi ◽  
Ahmed Alshareef ◽  
J. Sebastian Giudice ◽  
Matthew B. Panzer
Keyword(s):  
Traumatic Brain Injury ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Brain Injury ◽  
Element Analysis ◽  
Scaling Methods

scholarly journals Comparison and assessment of material models for simulation of infilled RC frames under lateral loads

2019 ◽  
Vol 71 (1) ◽  
pp. 49-56
Author(s):  
Mehmet Ömer Timurağaoğlu ◽  
Adem Doğangün ◽  
Ramazan Livaoğlu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Lateral Loads ◽  
Element Analysis ◽  
Material Models ◽  
Concrete Material ◽  
Rc Frames ◽  
Scale Models ◽  
The Finite Element Analysis ◽  
Infilled Rc Frames

In the present study, the behaviour of infilled RC frames under earthquake loading is investigated numerically, and the influence of three different concrete material models on the in-plane behaviour of infilled RC frames is evaluated using the finite element analysis (FEA). For this reason, the efficiency of infilled walls is examined on full scale models. Finite element analysis results show that mathematical model of concrete may change behaviour of infilled RC frames. The post-peak behaviour is especially influenced.

Material Models for the Finite Element Analysis of Materials Exhibiting a Pronounced Bauschinger Effect

2006 ◽  
Vol 128 (2) ◽  
pp. 190-195 ◽  
Author(s):  
Rolf R. de Swardt
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Hardening ◽  
Bauschinger Effect ◽  
Element Analysis ◽  
Material Models ◽  
Reverse Loading ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Reverse Yielding

Realistic material models have been developed on the basis of the experimental investigation of reverse loading with actual Bauschinger effect and implemented into a two-dimensional finite element computer program. The developed program is capable of treating the elastoplastic deformation behavior of thick-walled cylinders during both loading and unloading phases. Strain hardening may occur during loading, and reverse yielding may occur during unloading at a yield strength significantly reduced due to the Bauschinger effect. Three different models for the reverse hardening are presented. Strain hardening during reverse yielding may have a different slope than for forward loading, and it may also be nonlinear. The intended application is for autofrettage analysis of thick-walled cylinders. Being a numerical solution, it will also be very useful for finite element analysis of residual stress experimental procedures and also in the determination of more accurate stress intensity factors for autofrettaged cylinders that had undergone reverse yielding due to the Bauschinger effect.

scholarly journals Computational consistency of the material models and boundary conditions for finite element analyses on cantilever beams

2018 ◽  
Vol 10 (6) ◽  
pp. 168781401878002 ◽  
Author(s):  
Wei-chen Lee ◽  
Chen-hao Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Boundary Conditions ◽  
Material Model ◽  
Cantilever Beams ◽  
Element Analysis ◽  
Material Models ◽  
The Finite Element Analysis ◽  
Selection Of ◽  
Good Agreement

The objective of this research was to investigate the effects of material models, element types, and boundary conditions on the consistency of finite element analysis. Two cantilever beams were used; one made of stainless steel SUS301 3/4H and the other made of polymer polyoxymethylene. The load–deflection curves of the two cantilever beams obtained by experiments were compared to those obtained by finite element analysis, where the material models—including bilinear, trilinear, and multi-linear—were used. Four element types—beam, plane stress, shell, and solid—were also employed with the material models to obtain the simulated load–deflection curves of the cantilever beams. It was found that bilinear material models had the stiffest behavior due to their overestimated yield strength. In addition, by applying a finite displacement to simulate the grip of the cantilever beams, the discrepancy between the simulated permanent set and the experimental set could be reduced from 80% to 5%. To sum up, both the selection of the material model and the setup of the boundary conditions are critical for obtaining good agreement between the finite element analysis results and the experimental data.

Comparison of Brain Tissue Material Finite Element Models Based on Threshold for Traumatic Brain Injury

2016 ◽  
Author(s):  
Ashkan Eslaminejad ◽  
Hesam Sarvghad-Moghaddam ◽  
Asghar Rezaei ◽  
Mariusz Ziejewski ◽  
Ghodrat Karami
Keyword(s):  
Traumatic Brain Injury ◽  
Finite Element ◽  
Brain Injury ◽  
Dynamic Response ◽  
Brain Tissue ◽  
Head Model ◽  
Fe Modeling ◽  
Material Models ◽  
The Brain ◽  
Tissue Material

Blast traumatic brain injury (bTBI) may happen due to sudden blast and high-frequency loads. Due to the moral issues and the burden of experimental approaches, using computational methods such as finite element analysis (FEA) can be effective. Several finite element studies have focused on the effects of TBI to anticipate and understand the brain dynamic response. One of the most important factors in every FEA study of bTBI is the accurate modeling of brain tissue material properties. The main goal of this study is a comparison of different brain tissue constitutive models to understand the dynamic response of brain under an identical blast load. The multi-material FE modeling of the human head has several limitations such as its complexity and consequently high computational costs. Therefore, a spherical head model is modeled which suggests more straightforward observation/understanding of the FE modeling of skull (solid), CSF (fluid), and the brain tissue. Three different material models are considered for the brain tissue, namely hyperelastic, viscoelastic, and hyperviscoelastic. Brain dynamic responses are studied in terms of the head kinematics (linear acceleration), intracranial pressure (ICP), shear stress, and maximum mechanical strain. Our results showed that the hyperelastic model predicts larger ICP and shear than other constitutive brain tissue models. However, all material models predicted similar shear strain and head accelerations.

Interactive Graphics for the Analysis of Tires

1985 ◽  
Vol 13 (3) ◽  
pp. 127-146 ◽  
Author(s):  
R. Prabhakaran
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Approximate Solutions ◽  
Interactive Graphics ◽  
Element Analysis ◽  
Analysis Process ◽  
Physical Problems ◽  
The Finite Element Analysis ◽  
Analysis Computer ◽  
Discretization Technique

Abstract The finite element method, which is a numerical discretization technique for obtaining approximate solutions to complex physical problems, is accepted in many industries as the primary tool for structural analysis. Computer graphics is an essential ingredient of the finite element analysis process. The use of interactive graphics techniques for analysis of tires is discussed in this presentation. The features and capabilities of the program used for pre- and post-processing for finite element analysis at GenCorp are included.

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