scholarly journals Finite Element Analysis of Adolescent Mandible Fracture Occurring during Accidents

2018 ◽  
Author(s):  
Jarosław Żmudzki ◽  
Karolina Panek ◽  
Grzegorz Chladek ◽  
Marcin Adamiak ◽  
Paul Lipinski
Keyword(s):  
Finite Element ◽  
Geometric Model ◽  
Element Model ◽  
Cortical Layer ◽  
Mandibular Fractures ◽  
Total Force ◽  
Element Analysis ◽  
Mandible Fractures ◽  
Distributed Forces ◽  
Sport Accidents

The paper aims in assessing risks of mandible fractures consequent to impacts or sport accidents. The role of the structural stiffness of mandible, related to disocclusion state, is evaluated through numerical simulations using the finite element method (FEM). It has been assumed that the quasi-static stress field, due to distributed forces developed during accidents, could explain the common types of mandibular fractures. Geometric model of adolescent mandible was built, upon the basis of medical imaging, in CAD software with distinction between cortical layer and inner spongy bone. The finite element model of disoccluded mandible was next created. Mandibular condyles were supposed jammed in the maxillary fossae. The total force of 700 N, simulating an impact on mandible, has been sequentially applied in three distinct areas: centrally, at canine zone and at the mandibular angle. Clinically most frequent fractures of mandible were recognized through the analysis of maximal principal stress and maximal principal strain fields. Mandibular fracture during accidents can be analyzed at satisfactory level using linear quasi-static FE models for designing protections in sport and transport. The proposed approach can be improved by introducing more realistic interactions between condylar processes and fossae.

The Finite Element Analysis of a Heavy Semi-Trailer Frame Based on ANSYS

2014 ◽  
Vol 644-650 ◽  
pp. 455-458
Author(s):  
Yao Ye ◽  
Yong Hai Wu
Keyword(s):  
Finite Element ◽  
Geometric Model ◽  
Reference Method ◽  
Element Model ◽  
Element Analysis ◽  
Emergency Braking ◽  
The Finite Element Analysis ◽  
New Type ◽  
Stress And Deformation ◽  
3D Geometric Model

Frame has important effects on the performance of the whole of heavy semi-trailer. A heavy semi-trailer frame is analyzed and researched on in the finite-element way in this article. The frame of 3D geometric model is established by using Pro/E. And it was imported into the Hypermesh to establish frame finite element model. Frame are calculated by using ANSYS solver in bending condition, emergency braking conditions and rapid turn conditions of stress and deformation conditions. The computational tools and methods we used provide the new type of frame and development with a reference method to refer to in this paper.

CT Based Three Dimensional Geometric Model of Cervical Spine

2013 ◽  
Vol 273 ◽  
pp. 588-592
Author(s):  
Zhi Yuan Yan ◽  
Dong Mei Wu ◽  
Li Tao Zhang ◽  
Jun Zhao
Keyword(s):  
Finite Element ◽  
Cervical Spine ◽  
Geometric Model ◽  
Three Dimensional ◽  
Element Model ◽  
Skeletal System ◽  
High Quality ◽  
Element Analysis ◽  
Dimensional Reconstruction ◽  
The Finite Element Model

In order to obtain high-quality analytical results of the finite element model, it is essential to construct a three dimensional geometric model. The paper reconstructed an accurate three dimensional geometric model of cervical spine segments (C4-C7). The process of reconstruction included three-dimensional reconstruction, smooth processing, contour generation, grid generation and fitting surface. Moreover, the result of reconstruction was evaluated ultimately. The model was validated to be smooth and reasonable, and could meet the requirements of finite element analysis. The method is not merely applied to reconstruct the geometric model of the cervical spine. It is a way to construct the model of the skeletal system of the human body.

Finite Element Simulation of Grinding Stress for a Fiber Optic Connector (Ceramic Ferrule)

2005 ◽  
Vol 297-300 ◽  
pp. 2327-2332 ◽  
Author(s):  
Chang Min Suh ◽  
Ki Sang Jung
Keyword(s):  
Finite Element ◽  
Fiber Optic ◽  
Geometric Model ◽  
Element Model ◽  
Grinding Force ◽  
Element Analysis ◽  
Element Simulation ◽  
Dimensional Finite Element ◽  
Input Variables ◽  
High Level

Ceramic ferrule that is a major part of the optic connectors requires a high level of precision in a grinding chamfer. After the grinding chamfer, there is a problem in that the subsurface damages cannot be removed. The objective of this study was to analyze the grinding force and the associated stress generated in a ceramic ferrule during cylindrically grinding chamfer using Finite Element Analysis (FEA). A two-dimensional finite element model was constructed with the grinding parameters and the mechanical properties of the ferrule as input variables. The size of the geometric model was the same with the ceramic ferrule. The experimental results achieved by the SEM photograph were compared with those from the FEM. The FEM results were in correlation with those of the experiments.

Analysis of PZT Piezoelectric Ceramics Based on Finite Element Softeware ADINA

2011 ◽  
Vol 284-286 ◽  
pp. 1456-1459 ◽  
Author(s):  
Chang Song Zhang ◽  
Chen Jie Guo
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Piezoelectric Ceramic ◽  
Geometric Model ◽  
Piezoelectric Ceramics ◽  
Element Model ◽  
Analysis Software ◽  
Element Analysis ◽  
Piezoelectric Structure ◽  
The Finite Element Model

Using traditional experiment means on piezoelectric ceramic device has certain limitations due to the complicated boundary conditions and stress situation. In this paper, the finite element model of piezoelectric ceramics in line with the experiment results was established according to piezoelectric structure field and the coupling of the electric field, deformation of representative PZT piezoelectric ceramics under the voltage was analysed in using finite element analysis software ADINA according to establishing geometric model, defining boundary conditions and materials, Coupling calculation. Consistency between simulation results and experimental results is improved and lay the foundation for the realization of the piezoelectric ceramic shapes and vibration control.

Research on Properties of PZT Piezoelectric Ceramics by Finite Element Softeware ADINA

2011 ◽  
Vol 130-134 ◽  
pp. 3233-3236
Author(s):  
Chen Jie Guo ◽  
Chang Song Zhang
Keyword(s):  
Finite Element ◽  
Geometric Model ◽  
Piezoelectric Ceramics ◽  
Element Model ◽  
Analysis Software ◽  
Element Analysis ◽  
Piezoelectric Structure ◽  
Coupling Calculation ◽  
Simulation Results ◽  
The Finite Element Model

In this paper, the finite element model of piezoelectric ceramics in line with the experiment results was established according to piezoelectric structure field and the coupling of the electric field, deformation of representative PZT piezoelectric ceramics under the voltage was analysed in using finite element analysis software ADINA according to establishing geometric model, defining boundary conditions and materials, Coupling calculation. Consistency between simulation results and experimental results is improved and lay the foundation for the realization of the piezoelectric ceramic shapes and vibration control.

Air Compressor Piston Finite Element Analysis Based on ANSYS

2015 ◽  
Vol 713-715 ◽  
pp. 15-17
Author(s):  
Xin Xiang Zhou ◽  
Tian Shu Cong ◽  
Xing Long Lei ◽  
Feng Zhen Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Load ◽  
Geometric Model ◽  
Three Dimensional ◽  
Reference Value ◽  
Element Model ◽  
Deformation Analysis ◽  
Element Analysis ◽  
Air Compressor

The finite element analysis was carried out on the piston of WWD - 0.8/10 type air compressor under the action of mechanical load stress and deformation.Using three-dimensional modeling software Solidworks to establish a simplified geometric model of piston in air compressor ,Transform the model built in the three dimensional finite element analysis software into the finite element model for analysis,Determine the method of the piston by the mechanical load and boundary conditions,Completed the stress analysis and deformation analysis of the piston under the mechanical load ,The results of analysis of the piston design optimization has important reference value.

The Finite Element Analysis of the Stress and Deformation of the Micro-Milling Cutter Based on ANSYS

2014 ◽  
Vol 494-495 ◽  
pp. 345-348 ◽  
Author(s):  
Xin Xin Wang ◽  
Xiao Hong Lu ◽  
Guang Hao Xu ◽  
Feng Chen Wang
Keyword(s):  
Finite Element ◽  
Geometric Model ◽  
Element Model ◽  
Cutting Edge ◽  
Micro Milling ◽  
Element Analysis ◽  
Milling Cutter ◽  
Finite Element Software ◽  
Extended Length ◽  
Stress And Deformation

Because of the differences in spindle speed and extended length of micro milling cutter, Tool life and machining surface quality vary markedly. Therefore, a geometric model of carbide end mill whose diameter is 0.2mm is built. With free meshing method, meshing density is set up reasonably, which ensure the rationality of the built finite element model. On the premise of considering the extended length of the micro milling cutter, apply linear load on the main cutting edge and front-cutting edge, carry out the deformation and stress analysis using finite element software. Applying different spindle speeds under four extended lengths, through comparing maximum stress and strain under four extended lengths, change rules are summarized and the extended lengths of the tool suited for micro-milling are achieved.

Finite Element Analysis and Design Improvement for Ends Warping of Refrigerator Door

2010 ◽  
Vol 129-131 ◽  
pp. 1257-1261
Author(s):  
Zhi Wei Wang ◽  
Ling Qin Meng ◽  
Yan Qin Li ◽  
Yong Gao Li ◽  
De Hai Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Geometric Model ◽  
Element Model ◽  
Element Analysis ◽  
Analysis And Design ◽  
Design Improvement ◽  
Production Practice ◽  
Long Time ◽  
The Given

Facing the ends warping of refrigerators door, a refrigerator door is simulated using finite element theory and ANSYS software. The enclosed of finite element model and geometric model are established to conduct computing. The results show that simulated values of end warping are significantly greater than the given value of company technique standard. Several structural design schemes are proposed on the basis of production practice and theory analysis. The only one scheme of design improvement is chosen to compute using ANSYS, the results show the values of warping ends are significantly reduced and can meet the production requirements. The reasonable of finite element analysis is proven effectively through long time production.

КОНСТРУКТИВНО-ТЕХНОЛОГІЧНІ ОСОБЛИВОСТІ ХВОСТО-ВИХ БАЛОК СІТЧАСТОГО ТИПУ З ПОЛІМЕРНИХ КОМПО-ЗИЦІЙНИХ МАТЕРІАЛІВ ВЕРТОЛЬОТІВ ТРАНСПОРТНОЇ КАТЕГОРІЇ

2020 ◽  
pp. 15-30
Author(s):  
А. Г. Гребеников ◽  
И. В. Малков ◽  
В. А. Урбанович ◽  
Н. И. Москаленко ◽  
Д. С. Колодийчик
Keyword(s):  
Finite Element ◽  
Strain State ◽  
Layer Structure ◽  
Metal Structure ◽  
Element Model ◽  
Stress Strain ◽  
Element Analysis ◽  
Mesh Structure ◽  
Stress Strain State ◽  
Mesh Structures

The analysis of the design and technological features of the tail boom (ТB) of a helicopter made of polymer composite materials (PCM) is carried out.Three structural and technological concepts are distinguished - semi-monocoque (reinforced metal structure), monocoque (three-layer structure) and mesh-type structure. The high weight and economic efficiency of mesh structures is shown, which allows them to be used in aerospace engineering. The physicomechanical characteristics of the network structures are estimated and their uniqueness is shown. The use of mesh structures can reduce the weight of the product by a factor of two or more.The stress-strain state (SSS) of the proposed tail boom design is determined. The analysis of methods for calculating the characteristics of the total SSS of conical mesh shells is carried out. The design of the tail boom is presented, the design diagram of the tail boom of the transport category rotorcraft is developed. A finite element model was created using the Siemens NX 7.5 system. The calculation of the stress-strain state (SSS) of the HC of the helicopter was carried out on the basis of the developed structural scheme using the Advanced Simulation module of the Siemens NX 7.5 system. The main zones of probable fatigue failure of tail booms are determined. Finite Element Analysis (FEA) provides a theoretical basis for design decisions.Shown is the effect of the type of technological process selected for the production of the tail boom on the strength of the HB structure. The stability of the characteristics of the PCM tail boom largely depends on the extent to which its design is suitable for the use of mechanized and automated production processes.A method for the manufacture of a helicopter tail boom from PCM by the automated winding method is proposed. A variant of computer modeling of the tail boom of a mesh structure made of PCM is shown.The automated winding technology can be recommended for implementation in the design of the composite tail boom of the Mi-2 and Mi-8 helicopters.

Torsional Analysis of a Steel Cord-Rubber Tire Belt Structure

1996 ◽  
Vol 24 (4) ◽  
pp. 339-348 ◽  
Author(s):  
R. M. V. Pidaparti
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Composite Structures ◽  
Three Dimensional ◽  
Element Model ◽  
Torsional Stiffness ◽  
Element Analysis ◽  
Rubber Belt ◽  
Steel Cord ◽  
Torsional Analysis

Abstract A three-dimensional (3D) beam finite element model was developed to investigate the torsional stiffness of a twisted steel-reinforced cord-rubber belt structure. The present 3D beam element takes into account the coupled extension, bending, and twisting deformations characteristic of the complex behavior of cord-rubber composite structures. The extension-twisting coupling due to the twisted nature of the cords was also considered in the finite element model. The results of torsional stiffness obtained from the finite element analysis for twisted cords and the two-ply steel cord-rubber belt structure are compared to the experimental data and other alternate solutions available in the literature. The effects of cord orientation, anisotropy, and rubber core surrounding the twisted cords on the torsional stiffness properties are presented and discussed.

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