Biomechanical Research on Operations of Hangmann Fracture with Finite Element Method

There are increasing incidence of Hangman fracture with the development of society and industrialization. The research on upper cervical spine concerning hangman fracture is able to be well carried on with The finite element method(FEM) developing. The research includes a biomechanical experiment of cadaver specimens and FEM analysis accordingly. The finite element models of geometrical complex structure from medical images are generated automatically, the research presents simulation of different surgical option of hangman fracture, testified the models by loads, calculated the stabilities and stress of models. The corresponding results were summarized with experiment of cadaver specimens. The research demonstrate that clinical therapeutics is an good option for Hangman fracture with C2-3 inter-vertebral disc injury.

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Stress Variation in the Orthodontic Tipping Phenomenon Analysis through the finite element method

Revista de Chimie ◽

10.37358/rc.18.8.6460 ◽

2018 ◽

Vol 69 (8) ◽

pp. 1992-1995

Author(s):

Dan Dragos Sita ◽

Ligia Brezeanu ◽

Cristina Bica ◽

Dana Manuc ◽

Edwin Sever Bechir ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Alveolar Bone ◽

Complex Structure ◽

External Action ◽

The Finite Element Method ◽

Stress Variation ◽

Orthodontic Bracket ◽

Method Analysis ◽

Element Method

The purpose of the study is to assess through a FEM (Finite Element Method analysis), the behavior of a complex structure (enamel-tooth-alveolar bone-periodontal ligament-pulp), subjected to an external load through an orthodontic bracket-with forces of various intensities and to determine its influence on the entire structure.It is necessary to analyze the way all elements of the structure take over the external action given by the action of an orthodontic appliance through the brackets and the influence on the inner component -the pulp-inside of which there are the nerve endings.

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The Analysis and Simulation for Improved Cutting Process based on Finite Element Method (FEM) Analysis

International Journal of Digital Content Technology and its Applications ◽

10.4156/jdcta.vol7.issue7.58 ◽

2013 ◽

Vol 7 (7) ◽

pp. 500-507

Author(s):

SU dashi

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Fem Analysis ◽

Cutting Process ◽

Element Method

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NURSE-2 DoF Device for Arm Motion Guidance: Kinematic, Dynamic, and FEM Analysis

Applied Sciences ◽

10.3390/app10062139 ◽

2020 ◽

Vol 10 (6) ◽

pp. 2139

Author(s):

Betsy D. M. Chaparro-Rico ◽

Daniele Cafolla ◽

Marco Ceccarelli ◽

Eduardo Castillo-Castaneda

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Upper Limb ◽

Numerical Procedure ◽

Fem Analysis ◽

Arm Movement ◽

Assistive Device ◽

Arm Motion ◽

Element Method

Patients with neurological or orthopedic lesions require assistance during therapies with repetitive movements. NURSE (cassiNo-qUeretaro uppeR-limb aSsistive dEvice) is an arm movement aid device for both right- and left-upper limb. The device has a big workspace to conduct physical therapy or training on individuals including kids and elderly individuals, of any age and size. This paper describes the mechanism design of NURSE and presents a numerical procedure for testing the mechanism feasibility that includes a kinematic, dynamic, and FEM (Finite Element Method) analysis. The kinematic demonstrated that a big workspace is available in the device to reproduce therapeutic movements. The dynamic analysis shows that commercial motors for low power consumption can achieve the needed displacement, acceleration, speed, and torque. Finite Element Method showed that the mechanism can afford the upper limb weight with light-bars for a tiny design. This work has led to the construction of a NURSE prototype with a light structure of 2.6 kg fitting into a box of 35 × 45 × 30 cm. The latter facilitates portability as well as rehabilitation at home with a proper follow-up. The prototype presented a repeatability of ±1.3 cm that has been considered satisfactory for a device having components manufactured with 3D rapid prototyping technology.

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Curling Stress Equation for Transverse Joint Edge of a Concrete Pavement Slab Based on Finite-Element Method Analysis

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198196152500105 ◽

1996 ◽

Vol 1525 (1) ◽

pp. 35-43 ◽

Cited By ~ 1

Author(s):

Tatsuo Nishizawa ◽

Tadashi Fukuda ◽

Saburo Matsuno ◽

Kenji Himeno

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Fem Analysis ◽

Concrete Pavement ◽

Winkler Foundation ◽

Stress Equation ◽

The Past ◽

Transverse Joint ◽

Foundation Model ◽

Element Method

In the design of concrete pavement, curling stresses caused by the temperature difference between the top and bottom surfaces of the slab should be calculated at the transverse joint edge in some cases. However, no such equation has been developed in the past. Accordingly, a curling stress equation was developed based on stress analysis using the finite-element method (FEM). In this FEM analysis, a concrete pavement and its transverse joint were expressed by means of a thin plate–Winkler foundation model and a spring joint model, respectively. Multiregression analysis was applied to the results of the FEM numerical calculation and, consequently, a curling stress equation was obtained. After comparing the calculated results of the equation with curling stress equations developed in the past, it was confirmed that the equation was valid and practical.

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Prediction of mechanical behavior of 3D bioprinted tissue-engineered scaffolds using finite element method (FEM) analysis

Additive Manufacturing ◽

10.1016/j.addma.2020.101181 ◽

2020 ◽

Vol 33 ◽

pp. 101181 ◽

Cited By ~ 2

Author(s):

Anahita Ahmadi Soufivand ◽

Nabiollah Abolfathi ◽

Seyyed Ataollah Hashemi ◽

Sang Jin Lee

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Mechanical Behavior ◽

Fem Analysis ◽

Element Method

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FEM Analysis on Thermal Stress of Desulphurization Injection Lance

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.1531 ◽

2007 ◽

Vol 336-338 ◽

pp. 1531-1533

Author(s):

Jian Qiang Qi ◽

Yong Huang ◽

Shi Xi Ouyang ◽

Nan Li ◽

Jiang Li ◽

...

Keyword(s):

Thermal Conductivity ◽

Finite Element Method ◽

Finite Element ◽

Thermal Stress ◽

Elastic Modulus ◽

Fem Analysis ◽

Finite Element Method Model ◽

Method Model ◽

Element Method

By means of a finite element method model, the effects of property parameters of refractory on thermal stress of injection lance have been studied. The results show that the maximum thermal stress increases with the improvement of thermal conductivity and elastic modulus of refractory, while it decreases at first and then increases with the improvement of the coefficient of expansion of refractory.

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Analysis of Composite Shrinkage Stresses on 3D Premolar Models with Different Cavity Design Using Finite Element Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.586.202 ◽

2013 ◽

Vol 586 ◽

pp. 202-205 ◽

Cited By ~ 2

Author(s):

Milos Milosevic ◽

Nenad Mitrovic ◽

Vesna Miletić ◽

Uroš Tatic ◽

Andrea Ezdenci

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Numerical Models ◽

Experimental Testing ◽

Fem Analysis ◽

Local Stress ◽

Model Verification ◽

Polymerization Shrinkage ◽

Displacement Analysis ◽

Element Method

Local polymerization stress occurs due to polymerization shrinkage of resin based composites adhesively bonded to tooth tissues. Shrinkage causes local displacements of cavity walls, with possible occurrence of micro-cracks in the enamel, dentin and/or material itself. In order to design a cavity for experimental testing of polymerization shrinkage of dental composites using 3D optical analysis, in this paper finite element method (FEM) was used to analyze numerical models with different cavity radiuses. 3D optical strain and displacement analysis of composite materials and cavity walls is limited by equipment sensitivity i.e. 0.01% for strain and 1 micron for displacement. This paper presents the development of 3D computer premolar models with varying cavity radiuses, and local stress, strain and displacement analysis using FEM. Model verification was performed by comparing obtained results with data from the scientific literature. Using the FEM analysis of local strains, displacements and stresses exerted on cavity walls, it was concluded that the model with 1 mm radius was optimal for experimental optical 3D displacement analysis.

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FEM Analysis for Seismic Performance of Large Aqueduct Structure with Different Bent-Height

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.1837 ◽

2012 ◽

Vol 170-173 ◽

pp. 1837-1841

Author(s):

Qiu Hua Duan ◽

Lu Feng Yang ◽

Meng Lin Lou

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Dynamic Characteristic ◽

Seismic Performance ◽

Dynamic Stress ◽

Water Pressure ◽

Fem Analysis ◽

Stress Reaction ◽

Coupling Structure ◽

Element Method

This paper mainly uses finite element method (FEM) to research how the bent-height influence on dynamic characteristic, acceleration reaction, dynamic water pressure, dynamic stress reaction of the aqueduct-water coupling structure seismic performance. Through calculation and analysis some significant results were obtained.

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Headframe modelling accuracy for finite element method analysis purposes

Reports on Geodesy and Geoinformatics ◽

10.2478/rgg-2018-0010 ◽

2018 ◽

Vol 106 (1) ◽

pp. 19-24

Author(s):

Damian Biel ◽

Tomasz Lipecki

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Point Cloud ◽

Fem Analysis ◽

Point Clouds ◽

Finite Element Method Analysis ◽

Laser Scanners ◽

Method Analysis ◽

Design Estimate ◽

Element Method

Abstract Nowadays, the growing popularity of terrestrial laser scanners (TLS) allows to obtain a point cloud of many industrial objects along with classic surveying. However, the quality and model’s accuracy in comparison to a real shape seem to be a question, that must be further researched. It is crucial especially for Finite Element Method (FEM) analysis, which, being a part of technical design, estimate the values of construction’s dislocation and deformation. The article describes objects such as headgear with steel support and 4-post headframe with steel sheers. Both supports and sheers were modelled basing on point clouds. All the models were compared to the point cloud. The differences in models’ shape were calculated and the maximal values were determined. The results’ usefulness in FEM analysis was described.

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