Analysis of Pipe-Soil Interaction for a Miniature Pipejacking

2006 ◽  
Vol 22 (3) ◽  
pp. 213-220 ◽  
Author(s):  
K. J. Shou ◽  
F. W. Chang
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Physical Modeling ◽  
Driving Force ◽  
Numerical Models ◽  
Surface Subsidence ◽  
Finite Element Software

AbstractIn this study, physical and numerical models were used to analyze pipe-soil interaction during pipejacking work. After calibrating with the physical modeling results, the finite element software ABAQUS [1] was used to study the pipejacking related behavior, such as surface subsidence, failure mechanism, pipe-soil interaction, etc. The results show that the driving force in the tunnelling face is very important and critical for pipejacking. Surface subsidence is mainly due to the lack of driving force, however, excessive driving force could cause the unfavorable surface heaving problem. It also suggests that the depth of the pipe is critical to determine a proper driving force to stabilize the tunnelling face.

Failure Mechanism of a Slope Anti-Sliding Pile

2013 ◽  
Vol 639-640 ◽  
pp. 593-597
Author(s):  
Lin Chen ◽  
Yong Yao ◽  
Jiong Yang ◽  
Zhao Qiang Zhang
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Analysis Method ◽  
Feasible Method ◽  
Finite Element Software ◽  
Slope Excavation ◽  
Pile Design

According to finite element strength reduction method，the article has discussed the failure mechanism of anti-sliding pile by using finite element software MIDAS /GTS ，exploration report and anti-sliding pile design data.The comparative analysis shows that the failure of anti-siding pile is contributed by the slope excavation and rainwater.The analysis method and results can provide reference significance to other anti-sliding pile design.This paper also provide a feasible method for prediction of consequence in slope excavation.

Fatigue Failure Behaviour Study of Automotive Lower Suspension Arm

2011 ◽  
Vol 462-463 ◽  
pp. 796-800 ◽  
Author(s):  
Nawar A. Kadhim ◽  
Shahrum Abdullah ◽  
Ahmad Kamal Ariffin ◽  
S.M. Beden
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Numerical Models ◽  
Good Alternative ◽  
Analysis Tool ◽  
Element Analysis ◽  
Finite Element Software ◽  
Life Model ◽  
Experimental Process ◽  
Behaviour Study

Fatigue life of automotive lower suspension arm has been studied under variable amplitude loadings. In simulation, the geometry of a sedan car lower suspension arm has been used. To obtain the material monotonic properties, tensile test has been carried out and to specify the material mechanical properties of the used material, a fatigue test under constant amplitude loading has been carried out using the ASTM standard specimens. Then, the results used in the finite element software to predict fatigue life has been evaluated later to show the accuracy and efficiency of the numerical models which they are appreciated. The finite element analysis tool is therefore proved to be a good alternative prior to the further experimental process. The predicted fatigue life from the simulation showed that Smith-Watson-Topper model provides longer life than Morrow and Coffin-Manson models. This is due to the different consideration for each strain-life model during life calculations.

Seismic Damage Predictions and Antiseismic Performance Researches of Single-Story Brick Column Workshops in Lushan Ms7.0 Earthquake

2014 ◽  
Vol 638-640 ◽  
pp. 1842-1847
Author(s):  
Ming Zhen Wang ◽  
Bai Tao Sun ◽  
Pei Lei Yan
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Seismic Damage ◽  
Field Investigation ◽  
Damage Prediction ◽  
Affected Area ◽  
Damage Characteristics ◽  
Finite Element Software ◽  
Storage Room

Single-story brick column workshops are widely used as the production or storage room of medium and small-sized enterprises in China. Based on the field investigation of single-story brick column workshops at the earthquake-affected area after Lushan 7.0 earthquake, the damage characteristics of workshops are summed up. Damage prediction analyses are carried out for two typical single-story brick column workshops, and failure mechanism researches are conducted by using ABAQUS finite element software for a workshop. Finally, according to the results of failure mechanism researches, some relevant suggestions of the seismic reinforcement are put forward.

Numerical Simulation on the Form of Reinforcement of Reinforced Concrete Beam with Openings

2013 ◽  
Vol 444-445 ◽  
pp. 884-888
Author(s):  
Xue Han ◽  
Zheng Liu
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Failure Mechanism ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Plasticity Model ◽  
Damage Factor ◽  
Finite Element Software ◽  
Concrete Damaged Plasticity

In order to research the stress performance of reinforced concrete beam with different forms of reinforcement around the openings, a numerical simulation on reinforced concrete beam with circle openings is made by using the finite element software. The constitutive relation of concrete offered by the 2010 edition of code for design of concrete structures and the concrete damaged plasticity model is adopted in this article. The damage factor is introduced in the process of modeling, which can reflect the damage of beams with different forms of reinforcement directly and help to reveal the failure mechanism of members. Thus we can propose the optimization of reinforcement method.

Analysis of the Thermal-Structure Coupling of the Band Brake

2011 ◽  
Vol 121-126 ◽  
pp. 499-503
Author(s):  
Fu Cai Hu ◽  
Hu Lin Li ◽  
Bei Si Xie
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Stress Field ◽  
Failure Mechanism ◽  
Optimization Design ◽  
3D Model ◽  
Thermal Structure ◽  
Nonlinear Coupling ◽  
Finite Element Software ◽  
Braking Process

A 3D model of band brake is established with PRO/E software, and its thermal-structure nonlinear coupling is analyzed with finite element software MSC.Marc. Temperature field and stress field distribution of the brake band and the friction linings in braking process are calculated, and the failure mechanism of the connecting bolt is analyzed. All these provide references for optimization design.

scholarly journals Dynamic Properties of Cortical Bone Tissue: Impact Tests and Numerical Study

2011 ◽  
Vol 70 ◽  
pp. 387-392
Author(s):  
Adel A. Abdel-Wahab ◽  
Vadim V. Silberschmidt
Keyword(s):  
Finite Element ◽  
Numerical Model ◽  
Cortical Bone ◽  
Bone Tissue ◽  
Impact Loading ◽  
Numerical Study ◽  
Numerical Models ◽  
Dynamic Properties ◽  
High Energy ◽  
Finite Element Software

Bone is the principal structural component of a skeleton: it assists the load-bearing framework of a living body. Structural integrity of this component is important; understanding of its mechanical behaviour up to failure is necessary for prevention and diagnostic of trauma. Bone fractures occur in both low-energy trauma, such as falls and sports injury, and high-energy trauma, such as car crash and cycling accidents. By developing adequate numerical models to predict and describe the deformation and fracture behaviour up to fracture of a cortical bone tissue, a detailed study of reasons for, and ways to prevent or treatment methods of, bone fracture could be implemented. This study deals with both experimental analysis and numerical simulations of this tissue and its response to impact dynamic loading. Two areas are covered: Izod tests for quantifying a bone’s behaviour under impact loading, and a 3D finite-element model simulating these tests. In the first part, properties of cortical bone tissue were investigated under impact loading condition. In the second part, a 3D numerical model for the Izod test was developed using the Abaqus/Explicit finite-element software. Bone has time-dependent properties – viscoelastic – that were assigned to the specimen to simulate the short term event, impact. The developed numerical model was capable of capturing the behaviour of the hammer-specimen interaction correctly. A good agreement between the experimental and numerical data was found.

Approximate Solution of the Structural Problems Using Probabilistic Transformation

2010 ◽  
Vol 446 ◽  
pp. 91-99 ◽  
Author(s):  
S. Ouhimmou ◽  
A. El Hami ◽  
Rachid Ellaia ◽  
M. Tkiouat
Keyword(s):  
Finite Element ◽  
Numerical Models ◽  
Analytical Form ◽  
Transformation Method ◽  
Element Analysis ◽  
Finite Element Software ◽  
Structural Problems ◽  
Input And Output ◽  
The Finite Element Analysis ◽  
Probability Density Function Pdf

The aim of this paper is to present a new methodology for the evaluation of the statistical proprieties of the response of structures, based on The Finite Element Analysis (FEA) coupled with the Probabilistic Transformation Method (PTM). Uncertainty modelling with random variables motivates the adoption of advanced PTM for reliability analysis to solve problems of mechanical systems. The PTM is readily applicable in the case where the expression between input and output of structures are available in explicit analytical form. However, the situation is much more involved when it is necessary to perform the evaluation of implicit expression between input and output of structures through numerical models. For this we propose technique that combines the FEA software, and the PTM program to evaluate the Probability Density Function (PDF) of the response where the expression between input and output of structures is implicit. This technique is based on the numerical simulations of the FEA and the PTM by making an interface between Finite Element software and Matlab. Some problems of structures are treated in order to demonstrate the applicability of the proposed technique.

The Bearing Capacity of Excavated Pile under Load Test and Finite Element Analysis

2012 ◽  
Vol 256-259 ◽  
pp. 388-393
Author(s):  
Feng Shan Hao ◽  
Ying Guo ◽  
Yu Huang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Surface Subsidence ◽  
Load Test ◽  
Constitutive Relationship ◽  
Element Analysis ◽  
Finite Element Software ◽  
Finite Theory ◽  
Coulomb Model ◽  
Method Construction

This paper is used to study on the analysis and prediction of surface subsidence caused by pipe roof reinforcement method construction. Take one of the Shenyang's sewage disposal projects to be investigated, it monitored on field surface subsidence in the construction of under drain. During the measurement and monitoring, except for conventional measurement of surface subsidence according to code and peripheral convergence and so on, in order to analysis changes of stress and strain of the pipe roof in the whole construction of under drain. It also respectively arranges JMZX-212 intelligent string type of strain gauge in both internal and external sides of vault and hence. It used the Element Birth/Death of finite element software basing on the field data, using elastic-plastic and nonlinear finite element method. Material constitutive relationship used moor-coulomb model, simulating the process of tunnel of excavation and support, researching and stimulating the surface subsidence. The surface settlement of value was calculated applying finite theory via the numerical simulation, it based on prototype of engineering, which was approximately in accord with the measured value in field. The correctness of soil constitutive model chosen and boundary conditions used is verified, meanwhile, the numerical simulation shows the validity of the method .the results provide reference to similar construction method in the future.

Numerical Analysis on Failure Behavior of Composite Sandwich Plate

2013 ◽  
Vol 284-287 ◽  
pp. 178-182
Author(s):  
Yao Hsu
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Sandwich Plate ◽  
Core Material ◽  
Structural Safety ◽  
Failure Behavior ◽  
Sandwich Plates ◽  
Composite Sandwich ◽  
Finite Element Software ◽  
The Impact

The Composite sandwich plate is made of two laminated face-sheets and one core material. Since such a kind of structure has many advantages, they have been widely used in structural manufacturing industry. However, when sandwich plates are impacted by transverse loadings, damages that are usually invisible would occur inside the sandwich plate and those damages would potentially reduce the structural safety. Therefore, it is necessary to elucidate the failure mechanism and how they affect the failure behaviors of sandwich structures for safety purpose. To this end, the present study is to investigate the impact failure behaviors of sandwich plates subjected to a rigid spherical impactor. Numerical simulation approach is carried out by finite element method. To predict the initial failure, several failure criteria to face-sheets and core material are proposed. In addition, to further simulate the progressive failure behaviors, a stiffness modification method is proposed and incorporated into the finite element software. The analytical results show that the local failure including fiber breakages, delamination, core cracking and plasticity is the main failure mechanism of cases studied. Furthermore, parametric study is also conducted and discussed in the paper.

scholarly journals Modern numerical modeling of reinforced concrete structures

2021 ◽  
Vol 22 ◽  
pp. 13-20
Author(s):  
Zsolt Roszevák ◽  
István Haris
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Reinforced Concrete ◽  
Numerical Experiments ◽  
Numerical Models ◽  
Concrete Structures ◽  
Nonlinear Finite Element ◽  
Reinforced Concrete Structures ◽  
Finite Element Software ◽  
Modeling Procedure

Nowadays, many computer software products are available for the numerical modeling of reinforced concrete structures; however, the accuracy of the numerical models created by the programs can only be accepted with a properly developed and verified modeling procedure. Within the framework of the present article, we present the numerical modeling possibilities of reinforced concrete structural elements and their connections through numerical models made by a modeling procedure we have built. In our studies, we also dealt with quasi-static unidirectional (horizontal and vertical) and cyclically variable direction and magnitude loads. The numerical models were created using the ATENA 3D three-dimensional nonlinear finite element software developed specifically for the study of concrete and reinforced concrete structures. In many cases, the results obtained by numerical experiments were compared with the results obtained by laboratory experiments, and some of our numerical experiments were compared with the results obtained using two-dimensional finite element software. Within the framework of this article, we would like to give a comprehensive picture of the numerical studies we have performed. We have also briefly summarized the results and experiences obtained from 3D nonlinear finite element studies.

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