scholarly journals Three-Dimensional Simulation of Scalp Soft Tissue Expansion Using Finite Element Method

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Qiu Guan ◽  
Xiaochen Du ◽  
Yan Shao ◽  
Lili Lin ◽  
Shengyong Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Soft Tissue ◽  
Three Dimensional ◽  
Tissue Expansion ◽  
Element Model ◽  
Size Number ◽  
Proposed Model ◽  
Dimensional Simulation ◽  
Element Method

Scalp soft tissue expansion is one of the key medical techniques to generate new skin tissue for correcting various abnormalities and defects of skin in plastic surgery. Therefore, it is very important to work out the appropriate approach to evaluate the increase of expanded scalp area and to predict the shape, size, number, and placement of the expander. A novel method using finite element model is proposed to solve large deformation of scalp expansion in this paper. And the procedure to implement the scalp tissue expansion with finite element method is also described in detail. The three-dimensional simulation results show that the proposed method is effective, and the analysis of simulation experiment shows that the volume and area of the expansion scalp can be accurately calculated and the quantity, location, and size of the expander can also be predicted successfully with the proposed model.

The Finite Element Method: A Tool to Evaluate Shear Bond Strength of Dental Bracket

2014 ◽  
Vol 984-985 ◽  
pp. 431-437
Author(s):  
Vijaykumar Hiremath ◽  
Girija Bidarimath ◽  
Basavaraj Endigeri
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Element Model ◽  
Testing Machine ◽  
Three Dimensional ◽  
Element Model ◽  
Loading Conditions ◽  
Acceptable Error ◽  
Three Dimensional Finite Element ◽  
Element Method

In this paper finite element model of steel dental bracket is generated along with bonding agent, enamel & stress analysis is carried out on the bracket for different loading conditions. Three dimensional finite element model developed are constrained with boundary condition that resembles to the reality. The Vonmisses stress is recorded for each loading conditions and compared with experimental results. The experimental work for 60 samples were carried out on Universal testing machine at material testing laboratory, Basaveshwar Engineering College, Bagalkot. It is found from FEM results that the shear bonding strength for different loadings from 60 N to 80 N varies from 7.276 N/mm2 to 9.7N/mm2, which are closer to experimental values with acceptable error. The study reveals that Finite Element Method can be used as a strong tool to analyze the dental bracket and study different parameters to improve its performance and to avoid time and cost required for experimentation.

Numerical Simulation of Polymer Flows in Coat-Hanger Die Using Wagner Constitutive Model

2011 ◽  
Vol 189-193 ◽  
pp. 1941-1945
Author(s):  
Yong Li ◽  
Jian Rong Zheng
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Constitutive Model ◽  
Numerical Solutions ◽  
Flow Behavior ◽  
Computing Time ◽  
Three Dimensional ◽  
Die Design ◽  
Dimensional Simulation ◽  
Element Method

An understanding of flow behavior of polymer melts through a slit die is extremely important for optimizing die design. In this paper numerical simulations have been undertaken for the flow of linear low-density polyethylene through Coat-hanger sheet dies. A new finite element method is proposed to simulate the flow in slit channel using Wagner constitutive model. This is one kind of finite element semi-analytical method by which the velocity distributions in thickness direction is approach by Fourier series. Numerical results of volumetric flow and pressure in coat-hanger dies are given to compare to the three-dimensional simulation using the finite element method. It appears that numerical solutions are as accurate as the complete 3D calculations and the computing time can be saved.

Fatigue Crack Propagation Simulation of Rubber Shock Absorbers

2011 ◽  
Vol 415-417 ◽  
pp. 2298-2303
Author(s):  
Jing Yu Zhai ◽  
Ying Yang ◽  
Qing Kai Han
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fatigue Crack ◽  
Crack Growth ◽  
Shock Absorber ◽  
Three Dimensional ◽  
Element Model ◽  
Initial Crack ◽  
Shock Absorbers ◽  
Element Method

Rubber shock absorbers are the key parts to isolate vibrations of the machinery and equipment. In this paper, a three dimensional finite element model of a rubber shock absorber is established; then the computation of three dimensional fatigue crack growth rates are discussed by using the nonlinear finite element method. The stress distribution which can determine the initial crack location and the possible risk surface under dynamic loads is obtained. The three dimensional crack growth is simulated by using finite element method and linear elastic fracture mechanics. A brittle fracture process of the rubber shock absorber along the dangerous surface is simulated by using the cohesive element of ABAQUS.

scholarly journals Design finite element method based models of floating dry docks strength

2021 ◽  
pp. 43-52
Author(s):  
Anatoly Mironov ◽  
Dmitry Y. Titko
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Elastic Base ◽  
Beam Model ◽  
Buoyant Force ◽  
Dry Dock ◽  
Global Strength ◽  
Element Method

The features of global strength modelling of floating dry docks using finite element method are considered. Comparative analysis of two- and three-dimensional models was performed considering the interaction of the floating dry dock and the ship. To solve the problem of reducing the complexity of creating and the size of the finite element model, it is proposed to use the elements of a volumetric orthotropic body to model the main transverse beams of the pontoon. Hydrostatic elastic base of floating dry dock is represented as spring elements. The model of the dock support device includes spring and gap elements. The vessel is considered in the equivalent beam model. Results were obtained on such effects as redistribution of buoyant force due to deformation of the dock, incomplete inclusion of the towers in the general longitudinal bending of the dock, the effect of ship stiffness not only on the longitudinal, but also on the transverse bending of the dock.

Comparison of Bending Stress of a Helical Gear for Different Materials and Modules Using AGMA Standards in FEA

2013 ◽  
Vol 376 ◽  
pp. 423-427 ◽  
Author(s):  
S. Prabhakaran ◽  
S. Ramachandran
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Power Transmission ◽  
Three Dimensional ◽  
Element Model ◽  
Element Analysis ◽  
Helical Gears ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Element Method

Gearing is one of the most critical components in mechanical power transmission systems.. This paper explains about the comparison of the geometry of Helical gears for two different modules by modeling and mathematical equations, load distribution at various positions of the contact line and the stress analysis of Helical gears using three-dimensional finite element method. The bending stresses were examined using three-dimensional finite element model.. These stresses of different modules obtained from the finite element analysis were compared and the considerable reduction of weight occurred was found and also the values are compared with the theoretical values. Both results agree very well. This indicates that the finite element method model is accurate.

Fitting Analysis of Soil Strength Parameter Based on the Finite Element Method

2012 ◽  
Vol 204-208 ◽  
pp. 382-388
Author(s):  
Bin Yang ◽  
Li Ying Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Internal Force ◽  
Soil Strength ◽  
Structure Design ◽  
Strength Parameter ◽  
Navigation Lock ◽  
Element Method

Abstract: This paper takes the project of the navigation lock in Jialing River as an example to study the lock head structure design layout, and build up a three-dimensional finite element model and carry on the nonlinear numerical calculations by using large finite software ABAQUS, and calculating the structural internal force of the lock head by the 3D nonlinear finite element method. This paper utilizes the numerical analysis method to analyze soil strength parameters. Combining with the FEM calculation data, the data-fit between the influencing factors and the side piers’ stress and displacement was found. This provides new thoughts to analyze the influence of multivariate interaction on the lock head structure.

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