scholarly journals Photoelastic and Finite Element Stress Analysis of the Gap between the L4 and L5 Vertebrae

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Sarah Fakher Fakhouri ◽  
Suraya Gomes Novais-Shimano ◽  
Marcos Massao Shimano ◽  
Helton Defino ◽  
Cleudmar Amaral Araujo ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Elements ◽  
Intervertebral Disc ◽  
Stress Analysis ◽  
Disc Degeneration ◽  
Compressive Load ◽  
The Finite Element Method ◽  
Finite Element Stress Analysis ◽  
Transmission Technique

The purpose of this study was to analyze the stresses on the intervertebral disc between vertebrae L4 and L5 when a compressive load is applied on vertebra L4 using the photoelasticity transmission technique and the finite element method. Nine photoelastic models were used and were divided into three groups. Each group was formed by three models, according to the localization of the sagittal cut on vertebrae L4-L5. Simulation was carried out using a load of 23 N. The fringe orders were assessed by points close to the edge of the intervertebral disc using the Tardy compensation method. The analyses using the photoelasticity technique and the model of the finite elements showed that the stress generated by the vertebrae on the intervertebral disc was higher in the posterolateral region. Thus, this region is more susceptible to pathologies such as hernia and disc degeneration.

Finite Element Stress Analysis of the Crowns of Normal and Restored Teeth

1976 ◽  
Vol 55 (6) ◽  
pp. 1004-1011 ◽  
Author(s):  
A.L. Yettram ◽  
K.W.J. Wright ◽  
H.M. Pickard
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Analysis ◽  
Two Dimensional ◽  
Stress Distributions ◽  
The Finite Element Method ◽  
Relative Stiffness ◽  
Finite Element Stress Analysis ◽  
Element Method ◽  
Finite Element Stress

Stress distributions are Presented for a normal and a restored mandibular second premolar under masticatory-type forces. These were obtained using the finite element method of stress analysis aPPlied to two-dimensional models. The effect of the relative stiffness of the materials is examined in each instance.

scholarly journals Finite Element Stress Analysis of a Restored Axisymmetric First Molar

1974 ◽  
Vol 53 (4) ◽  
pp. 859-866 ◽  
Author(s):  
J.W. Farah ◽  
R.G. Craig
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Distribution ◽  
Stress Analysis ◽  
Shear Stresses ◽  
The Finite Element Method ◽  
Uniform Stress ◽  
Finite Element Stress Analysis ◽  
Crown Preparation ◽  
Maximum Minimum

A first molar with full crown preparation and three marginal configurations-chamfer, chisel, and shoulder with a bevel-was analyzed by the finite element method. The maximum, minimum, and shear stresses were plotted as a function of the radius along various horizontal planes. The chamfer geometry exhibited the most uniform stress distribution.

scholarly journals Stress Analysis of Different Angulations of Implant Installation: The Finite Element Method

2008 ◽  
Vol 24 (3) ◽  
pp. 138-143 ◽  
Author(s):  
Ting-Hsun Lan ◽  
Heng-Li Huang ◽  
Ju-Hui Wu ◽  
Huey-Er Lee ◽  
Chau-Hsiang Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Analysis ◽  
The Finite Element Method ◽  
Element Method

scholarly journals Non-linearity of the contact layer between elements joined in a multi-bolted connection and the preload of the bolts

2016 ◽  
Vol 165 (2) ◽  
pp. 3-8
Author(s):  
Rafał GRZEJDA
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Elements ◽  
Cylinder Head ◽  
Contact Layer ◽  
Rigid Support ◽  
The Finite Element Method ◽  
Bolted Connection ◽  
Winkler Model ◽  
Engine Cylinder

The paper presents modeling and calculations of multi-bolted connections at the assembly stage on an example of the engine cylinder head-block connection. The physical model of the connection was introduced as a combination of three subsystems: the set of bolts, the joined element and the contact layer between the joined element and the rigid support. The finite element method (FEM) was used for the modeling. Bolts were replaced with hybrid elements. The joined element was modeled with spatial finite elements. The Winkler model of the contact layer has been taken into consideration. The truth of the theorem has been examined, according to which non-linearity of the contact layer has a negligible impact on the final values of the bolt forces in the case of sequential preloading of the multi-bolted connection. The results of the calculations of a selected multi-bolted connection have been compared with the experimental results.

Teaching Electromagnetics through Finite Elements. Part I: The Rationale

1988 ◽  
Vol 25 (1) ◽  
pp. 33-49 ◽  
Author(s):  
S. Ratnajeevan H. Hoole
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Elements ◽  
Special Solution ◽  
The Finite Element Method ◽  
Solution Methods ◽  
Element Method

The rationale for teaching undergraduate electromagnetics partly through the finite element method, is put forward. Properly presented, the finite element method, easily within the ken of the engineering undergraduate, promotes clarity and helps to replace large portions of syllabi devoted to special solution methods, with problems of industrial magnitude and character.

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