Flex Gradient Optimization on Stiffened Steel Plate of Profiled Plate Rubber Support

2010 ◽  
Vol 97-101 ◽  
pp. 2806-2809
Author(s):  
Duan Cai Yuan ◽  
Jin Xi Duan ◽  
Chu Shun Zhou ◽  
Shang Yang Meng
Keyword(s):  
Finite Element ◽  
Steel Plate ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Transverse Displacement ◽  
Nonlinear Finite Element Method ◽  
Gradient Optimization ◽  
Railroad Bridge ◽  
Stiffened Steel ◽  
The Finite Element Model

The plate rubber support is widely used in railroad bridge. To analyse its capability of transverse displacement resistance and increase its life-span, the finite element model of profiled plate rubber support is established by nonlinear finite element method. The influence of flex gradient of stiffened steel plate to the function of the plate rubber support is analyzed and the optimal gradient is obtained.The method and conclusions are available for designing of plate rubber support.

The Wind Load Analysis of a Cable Net Structure

2013 ◽  
Vol 811 ◽  
pp. 228-233
Author(s):  
Yang Yang ◽  
Yuan Ying Qiu ◽  
Gai Juan Wang
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Wind Load ◽  
Nonlinear Finite Element ◽  
Response Analysis ◽  
Nonlinear Finite Element Method ◽  
Form Finding ◽  
Load Analysis ◽  
The Given ◽  
The Finite Element Model

The response analysis of a large cable net bearing wind load is conducted by the nonlinear finite element method. First, the form-finding calculation of the cable net structure is carried out to find an equilibrium state which can make the pretensions and sags of the wires meet the given requirements. Then the static analyses of the finite element model of the cable net structure under different wind loads are conducted to assess whether the cable net structure meets the requirements for strength. The work of this paper establishes the foundation for the design of a large cable antenna.

The Deformation and Fracture of Skin under Insertion of Microneedle

2013 ◽  
Vol 774-776 ◽  
pp. 779-783
Author(s):  
Xiang Qing Kong ◽  
Yan Dong Qu
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Deformation And Failure ◽  
Skin Deformation ◽  
Deformation And Fracture ◽  
Force Displacement ◽  
The Finite Element Model ◽  
Good Agreement

Microneedle, as a novel way for transdermal drug delivery, due to its painless and minimally invasive, has recently attracted much attention. The present study investigated skin deformation and failure due to insertion by a single microneedle with nonlinear finite element method. The finite element model considered multilayered, non-linear and hyperelastic properties of the skin, and tissue failure was phenomenologically described by an effective stress failure criterion. The deformation and failure of skin and the force displacement behaviour of the microneedle are discussed. The numerical results show a good agreement with the reported experimental data. The performed study provided novel insights into skin failure due to insertion of microneedle, and provided useful information with which to optimise the microneedle design.

Dynamics of Multi-Disk Rotor System with Rub-Impact Fault

2009 ◽  
Vol 16-19 ◽  
pp. 1082-1086
Author(s):  
Ji Shuang Dai ◽  
Hui Ma ◽  
Xue Jun Wang ◽  
Bang Chun Wen
Keyword(s):  
Finite Element ◽  
Contact Region ◽  
Element Model ◽  
Rotor System ◽  
Nonlinear Finite Element Method ◽  
Fractional Frequency ◽  
Theoretical Support ◽  
Frequency Components ◽  
Stage 1 ◽  
The Finite Element Model

In this paper, a multi-disk rotor system is studied. The rotor system is properly simplified and the finite element model is established. Assuming that contact region is an arc when the practical rotor-stator rub-impact fault occurs. Contact analysis and nonlinear finite element method are adopted to carry out numerical simulation of rub-impact. The results show that 1/2 fractional frequency components appear in slight rub-impact stage; 1/3 fractional frequency components appear in moderate rub-impact stage and 1/4 fractional frequency components appear in serious rub-impact stage. The research results will provide theoretical support for fault diagnosis of rub-impact.

Analysis of Static Bending Rigidity with Car Body Lightweight Design for Certain Model of Electric Vehicle

2014 ◽  
Vol 552 ◽  
pp. 24-28
Author(s):  
Zhen Yu Xu
Keyword(s):  
Finite Element ◽  
Electric Vehicle ◽  
Steel Plate ◽  
Lightweight Design ◽  
High Strength ◽  
Element Model ◽  
Bending Rigidity ◽  
Car Body ◽  
Before And After ◽  
The Finite Element Model

Taking a certain urban model of electric vehicle as example, DC04 steel plate has replaced with high-strength steel plate BH340 for some parts of the car body on the purpose of reducing the car weight; at the same time, reduced the thickness of steel plate at the replacing spots, and then set the finite element model for the car body to compare its bending rigidities before and after replacement. On the premise of satisfying car body’s bending rigidity, it could make car body to reduce a weight of 23.2KG to satisfy the requirement for lightweight design.

Analysis of Leaf Spring’s Damping Characteristic Based on Nonlinear Finite Element

2011 ◽  
Vol 314-316 ◽  
pp. 1628-1632
Author(s):  
Cui Lian Fan ◽  
Shun Ming Li
Keyword(s):  
Finite Element ◽  
Friction Coefficient ◽  
Working Conditions ◽  
Excitation Frequency ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Leaf Spring ◽  
Damping Characteristics ◽  
The Finite Element Model ◽  
Sinusoidal Excitation

In order to know about the damping characteristics of leaf spring in the actual working conditions, the finite element model was build with large deformation, interleaf friction and contact considered simultaneously. In the single sinusoidal excitation, the effects of different friction coefficient, amplitude and excitation frequency on the hysteresis and damping characteristics of leaf spring were studied. Many results were reached in the paper. It provided the references for researching the vibration characteristics of leaf spring further in the nonlinear states.

Impact Study of Bend Tube on Bullet Initial Disturbance under the Action of Gravity

2014 ◽  
Vol 627 ◽  
pp. 69-73
Author(s):  
Guo Qing Liu ◽  
Cheng Xu ◽  
Xiao Yun Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Great Influence ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Initial Disturbance ◽  
Nonlinear Finite Element Method ◽  
Impact Study ◽  
Vertical Stiffness ◽  
Simulation Results

In order to study the influence of bend tube on firing accuracy due to gravity, a finite element model of sniper rifle, only considering the interaction between bullet and tube, was established based on nonlinear finite element method. The initial disturbance of bullet was taken as a measuring standard of firing accuracy. The model was used to simulate the launch process of sniper rifle under the condition of gravity static equilibrium in the method of the mixing calculation which had advantages of both dynamic explicit algorithm and static implicit algorithm. The simulation results show that vertical stiffness increases due to gravity and then the instantaneous velocity and attitude of bullet are largely influenced. Bending tube has a great influence on bullet motion.

Experimental Study on Flexural Behavior of Damaged RC Beams Strengthened with Prestressed CFRP Plate

2011 ◽  
Vol 250-253 ◽  
pp. 2263-2270
Author(s):  
Rui Zhou ◽  
Mei Zhen Zhang ◽  
Zhou Hong Zong
Keyword(s):  
Experimental Study ◽  
Finite Element ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Flexural Behavior ◽  
Finite Element Models ◽  
Rc Beams ◽  
Cfrp Plate ◽  
Sustained Loading ◽  
The Finite Element Model

Strengthening using prestressed CFRP plate is a new developed technology in recent years, which can significantly improve the flexural behavior of reinforced concrete (RC) beams. In this paper, an experimental study including four RC beams stengthened with CFRP plates using self-developed anchorage system was carried out. The nonlinear finite element models of the strengthened beams were constructed to simulate the influence of flexural behavior on RC beams strengthened with CFRP plates under different damage degrees. The experimental results indicated that initial damage degrees have greatly influence on the crack distribution and ductility, deflection and the ultimate flexural strength of the strengthened beams, as well as steel reinforcement strain and CFRP plate strain. Meanwhile, the finite element model can predict accurately performances of strengthened RC beams before CFRP debonding. In addition, the numerical analysis indicated that the sustained loading while strengthening RC beam using prestressed CFRP plates would induce adverse effect, so the live loading should be removed before starting the strengthening works.

Effect of Cracked Blade Distribution on Strength of Centrifugal Impeller

2013 ◽  
Vol 423-426 ◽  
pp. 1884-1888
Author(s):  
Gang Cheng ◽  
Jian Feng Li ◽  
Wei Qiang Wang ◽  
Jie Sun
Keyword(s):  
Finite Element ◽  
Centrifugal Force ◽  
Numerical Models ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Centrifugal Impeller ◽  
Nonlinear Finite Element Method ◽  
Element Analysis ◽  
Equilibrium Pressure ◽  
The Finite Element Analysis

In this paper, the finite element analysis is made to the structure of the impeller, a finite element model of a impeller with cracks was established. This paper presents results of the stress analysis of the compressor blade subjected to centrifugal force and aerodynamic equilibrium pressure. A nonlinear finite element method was utilized to determine the stress state of the blades. In this analysis, the numerical models without defects and also with cracks were defined. The simulation results showed that high stresses occurred in the areas where the cracks initiated under both centrifugal force and aerodynamic equilibrium pressure. The distribution of two cracked blades can greatly influence the stress level of the impeller; when two cracked blades locate in the adjacent positions，the increasing value of stress is minimum. When the two cracked blades separated by 150°, the increasing value of stress is maximum. It provides a basis for strength calculation of the impeller.

A Study on Stiffness Characteristics of Air Spring With FEM

2005 ◽  
Author(s):  
Zhen-Xia Ye ◽  
Hai-Chao Zhu ◽  
Lin He
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Nonlinear Stiffness ◽  
Air Spring ◽  
Element Analysis ◽  
Layer Composite ◽  
Stiffness Characteristics ◽  
The Finite Element Model ◽  
Transversal Stiffness

The vertical and transversal stiffness of the air spring with multi-layer composite material were studied using the nonlinear finite element analysis. The geometrical non-linearity, the nonlinear elasticity and the contacting nonlinearity were analyzed. The finite element model was built in Marc software, and the nonlinear stiffness characteristics were calculated. The influence of parameters on the stiffness characteristics was analyzed.

Numerical Study of Dynamic Response of Steel Deck Pavement on the Bascule Bridge

2010 ◽  
Vol 148-149 ◽  
pp. 1246-1249
Author(s):  
Yun Liu ◽  
Xin Yu ◽  
Zhen Dong Qian
Keyword(s):  
Finite Element ◽  
Mechanical Response ◽  
Steel Plate ◽  
Numerical Study ◽  
Element Model ◽  
Shear Stresses ◽  
Asphalt Paving ◽  
Steel Deck ◽  
The Finite Element Model ◽  
Opening Process

The bascule bridge is one of the most suitable bridge types for ports and rivers in cities. In order to discuss the mechanical behavior of the pavements in the opening process, the finite element model of the pavement system on the Haihe Bridge being built in Tianjin China was built, and the mechanical response in the opening process was calculated. The research results show that the asphalt paving with the thickness of 30mm~40mm is fit for the bascule bridge. The max shear stresses of pavement between pavement and steel plate in the opening process rise with the increase of Young’s modulus, and the high temperature during the construction and conservation after construction should be provided.

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