1G43 Construction and Head Impact Simulation of 3D FEM Model of the Brain Considering the Material Properties of Each Part of Brain

2016 ◽  
Vol 2016.28 (0) ◽  
pp. _1G43-1_-_1G43-5_
Author(s):  
Yu SUIZU ◽  
Junji OHGI ◽  
Itsuo SAKURAMOTO ◽  
Xian CHEN ◽  
Norihiro NISHIDA ◽  
...  
Keyword(s):  
Material Properties ◽  
Head Impact ◽  
3D Fem ◽  
Fem Model ◽  
Impact Simulation ◽  
The Brain

Head impact simulation by brain model in consideration of material properties of ecah brain part

2021 ◽  
Vol 2021.59 (0) ◽  
pp. 01c5
Author(s):  
Kanshi OH ◽  
Junji OHGI ◽  
Xian CHEN ◽  
Fei JIANG ◽  
Norihiro NISHIDA ◽  
...  
Keyword(s):  
Material Properties ◽  
Head Impact ◽  
Impact Simulation ◽  
Brain Part

Head impact simulation by brain model in consideration of material properties of ecah brain part

2018 ◽  
Vol 2018.56 (0) ◽  
pp. 107
Author(s):  
Yuki MASATSUGU ◽  
Junji OHGI ◽  
Yu SUIZU ◽  
Xian CHEN ◽  
Fei JIANG ◽  
...  
Keyword(s):  
Material Properties ◽  
Head Impact ◽  
Impact Simulation ◽  
Brain Part

3D FEM model to simulate Brownian motion inside trabecular tissue from human femoral head

2021 ◽  
pp. 1-8
Author(s):  
Fabiano Bini ◽  
Andrada Pica ◽  
Simone Novelli ◽  
Raffaella Pecci ◽  
Rossella Bedini ◽  
...  
Keyword(s):  
Brownian Motion ◽  
Femoral Head ◽  
3D Fem ◽  
Fem Model

scholarly journals The Hammer and the Nail: Biomechanics of Striking and Struck Canadian University Football Players

2021 ◽  
Author(s):  
Jeffrey S. Brooks ◽  
Adam Redgrift ◽  
Allen A. Champagne ◽  
James P. Dickey
Keyword(s):  
College Football ◽  
Head Impact ◽  
Football Players ◽  
Video Footage ◽  
Impact Location ◽  
Rule Changes ◽  
Left And Right ◽  
The Brain

AbstractThis study sought to evaluate head accelerations in both players involved in a football collision. Players on two opposing Canadian university teams were equipped with helmet mounted sensors during one game per season, for two consecutive seasons. A total of 276 collisions between 58 instrumented players were identified via video and cross-referenced with sensor timestamps. Player involvement (striking and struck), impact type (block or tackle), head impact location (front, back, left and right), and play type were recorded from video footage. While struck players did not experience significantly different linear or rotational accelerations between any play types, striking players had the highest linear and rotational head accelerations during kickoff plays (p ≤ .03). Striking players also experienced greater linear and rotational head accelerations than struck players during kickoff plays (p = .001). However, struck players experienced greater linear and rotational accelerations than striking players during kick return plays (p ≤ .008). Other studies have established that the more severe the head impact, the greater risk for injury to the brain. This paper’s results highlight that kickoff play rule changes, as implemented in American college football, would decrease head impact exposure of Canadian university football athletes and make the game safer.

SIMULATION OF DYNAMIC EVENT OF IMPACT USING EXPLICIT 3D FEM MODEL AND VALIDATION BY EXPERIMENT AND CONTACT MODELS

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Akshay Mallikarjuna ◽  
Dan Marghitu ◽  
P.K. Raju
Keyword(s):  
Material Properties ◽  
Permanent Deformation ◽  
Oblique Impact ◽  
Coefficient Of Restitution ◽  
Impact Behavior ◽  
3D Fem ◽  
Dynamic Event ◽  
Contact Models ◽  
Explicit Dynamic ◽  
The Impact

— In this study, an optimized method to simulate the dynamic 3D event of the impact of a rod with a flat surface has been presented. Unlike the 2D FEM based contact models, in this study both the bodies undergoing the impact are considered elastic(deformable) and simulation is the dynamic event of the impact, instead of predefined 2D symmetric contact analysis. Prominent contact models and plasticity models to define material properties in ANSYS are reviewed. Experimentation results of normal and oblique impact of the rod for different rods provided the coefficient of restitution. Experimental results of permanent deformation on the base for different impact velocity is derived out of a prominent impact study. The simulation results are in co-relation with experiment and both indentation and flattening models on the coefficient of restitution (COR) and permanent deformation of the base and rod after the impact. Thus, the presented 3D Explicit Dynamic simulation of impact is validated to analyze the impact behavior of the 2 bodies without any predefined assumptions with respect to boundary conditions or material properties.

scholarly journals Influence of end Contsrains on the Global Behaviour of a Box Girder

2016 ◽  
Vol 6 (1) ◽  
pp. 7-15
Author(s):  
Daniela Mihaela Boca ◽  
A. Faur ◽  
A. Boca
Keyword(s):  
Prestressed Concrete ◽  
Transport Infrastructure ◽  
Box Girders ◽  
3D Fem ◽  
Important Data ◽  
Box Girder ◽  
Fem Model ◽  
Global Behaviour ◽  
Applied Forces ◽  
Precast Prestressed Concrete

Abstract This study aims to presents the importance of end constrains, boundary conditions and position of the applied forces regarding the design of precast/prestressed concrete box girders. The study is based on a destructive test which was performed on a 37.1 m span single-cell prestressed concrete box girder. The scope of the test was to certify the usage of such girders for the new Transylvania motorway bridges. The test is numerically reproduced through a full 3D FEM model implemented in SAP2000. The influence of the end diaphragms is considered by analysing the beam’s behaviour to six loading conditions: one of which is replicating the loadings during the test, while the others are conceived as real vertical and horizontally loading scenarios. The results obtained for the girders with and without end constrains are compared. The performances of both design solutions in the presence of prestressing are highlighted where applicable. It is considered that the results of this study may provide very important data if considering that Romania has an urgent need to realize a modern and an adequate transport infrastructure.

Flow-Induced Vibration Study of Tunnel Spillway Working Gate on One Reservoir

2012 ◽  
Vol 226-228 ◽  
pp. 13-16
Author(s):  
Xin Wang ◽  
Shao Ze Luo
Keyword(s):  
Dynamic Pressure ◽  
High Energy ◽  
Vibration Response ◽  
Analysis Method ◽  
Flow Induced Vibration ◽  
3D Fem ◽  
Fem Model ◽  
Tunnel Spillway ◽  
Partial Opening ◽  
Spillway Tunnel

In order to study the flow-induced vibration of the spillway tunnel working gate of one reservoir, hydraulic model test with scale 1:20 was conducted to obtain the dynamic pressure characteristics on the working gate. Experiment modal analysis method was employed to identify the structure dynamic characteristics through the 1:10 working gate mode test. The 3D FEM model of the gate was built to simulate the vibration response of the structure. The research showed the low order modal frequencies of the working gate were not fully breaking away from the high energy zone of the dynamic water, which would induce severe vibration. The vibration response of the gate became the biggest when it was operating at 0.5 partial opening.

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