Evaluation of Permanent Deformation Models in Asphalt Mixture Overlays for Hot Climates

2013 ◽  
Vol 723 ◽  
pp. 737-744
Author(s):  
Aaron D. Mwanza ◽  
Pei Wen Hao ◽  
Xiao Ming Dong
Keyword(s):  
Finite Element ◽  
Prediction Models ◽  
Simulation Analysis ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Three Dimensional ◽  
Material Model ◽  
Element Analysis ◽  
Constitutive Material Model ◽  
Falling Weight

Results from a third mobile load simulator (MLS3) experiment indicates that in-situ determination of the under laying pavement material elastic modulus properties using the back calculation method from falling weight deflection measurements provide reliable material model inputs for finite element analysis. In this study, finite element (FE) prediction models available in abaqus were implemented to simulate the rutting performance of asphalt mixture overlays under accelerated loading. A unified, three dimensional pavement section was proposed as a constitutive material model for the rutting prediction of various pavement section combinations in FE analysis. The asphalt overlay mix was treated as an elastic material and its corresponding material properties were determined from laboratory tests while falling weight deflection tests were conducted to determine the underlaying layer moduli. In general, the FE creep and elasto-viscoplastic models predicted that rutting developments match well with the MLS3 measured results. However, to perform an effective evaluation of the FE simulation analysis and obtain reliable prediction results from an MLS3 experiment, some special techniques to obtain and characterize material input parameters are deemed necessary.

Non-Linear Three-Dimensional Finite Element Analysis of Some Extremely Deep Foundation Pit Support

2013 ◽  
Vol 443 ◽  
pp. 79-83
Author(s):  
Zhen Xi Yu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Element Analysis ◽  
Deep Foundation Pit ◽  
Three Dimensional Finite Element ◽  
Support Engineering

In recent years, with the enhancement of overall national strength in China, the computer simulation technology has been developed rapidly and widely applied to engineering construction. Particularly, investment proportion of the technology in deep foundation pit engineering is immense. Yet affected by national conditions in China, the construction and application of deep foundation pit engineering have many extensive factors. It also results in insufficient vigor of finite element analysis of deep foundation pit support construction. In this way, construction problems arise frequently under the condition that there exist buildings around. With some deep foundation pit support engineering, the thesis conducts simulation analysis of the engineering through the technology of nonlinear three-dimensional finite element.Project profile

Three Dimensional Finite Element Analysis of Reinforced Concrete Rectangular-Sectioned Aqueduct

2013 ◽  
Vol 644 ◽  
pp. 358-361
Author(s):  
Dong Yu Ji
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Element Analysis ◽  
Finite Element Software ◽  
Operating Process ◽  
Element Simulation ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper adopts general finite element software to carry out three-dimensional finite element simulation analysis for Huizeli reinforced concrete rectangular-sectioned aqueduct. Considering four combination cases in aqueduct’s construction and operating process, researching variation laws of the aqueduct’s stress and displacement. Analysis results show that design scheme of Huizeli reinforced concrete rectangular-sectioned aqueduct is reasonable, it can meet design requirements. Analysis results provide some theory references for design of reinforced concrete rectangular-sectioned aqueduct.

Based on Bearing Centerless Strengthening and Polishing Processing Multiple Collision Finite Element Simulation Analysis

2011 ◽  
Vol 328-330 ◽  
pp. 624-627
Author(s):  
Ya Fei Ou ◽  
Xiao Chu Liu ◽  
Chuan Jian Liu ◽  
Wen Xiong Li ◽  
Hao Wang
Keyword(s):  
Finite Element ◽  
Compressive Stress ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Multiple Collision ◽  
Surface Residual Stress ◽  
Element Analysis ◽  
Surface Strength ◽  
Three Dimensional Modeling ◽  
Residual Stress State

To further understand the bearing performance’s influence of the plastic deformation after balls and bearing rings surface multiple collision in ball bearing’s strengthening and polishing processing by the strengthening and polishing machine. ABAQUES software is used for finite element analysis in the three-dimensional modeling of multiple collision, and the plastic strengthen the performance of bearings is researched mainly. The results shows that the raceway surface is significant plastic strengthen in multiple collisions, Yield ability is enhanced largely, and surface residual stress state present for the compressive stress. Raceway surface strengthening process requires a particular number of times to ensure the processing, with strengthening processing times increasing, bearing raceway surface strength is saturated, then, the number continued to increase to strengthen, the surface strength is no significant increase. But after the collision of ball, uniform residual compressive stress is forming in the bearing surface, good for improving the fatigue strength and bearing life.

Finite Element Analysis of Resisting Explosive Loading for Mine Escape Capsule

2012 ◽  
Vol 446-449 ◽  
pp. 2206-2209
Author(s):  
Jin Long Wang
Keyword(s):  
Finite Element ◽  
Shock Waves ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Explosive Loading ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Simulation Results ◽  
Three Dimensional Finite Element

Three-dimensional finite element model of the mine escape capsule is established. With the different values of explosion shock waves, simulation analysis of the entry locker is performed by using ABAQUS. The simulation results indicate that the mine escape capsule is safe and available if the surge pressure of shock waves is less than 3.5Mpa.

Nonlinear Finite Element Analysis for Stress and Deformation of CFRD

2015 ◽  
Vol 744-746 ◽  
pp. 536-539
Author(s):  
Shu Yun Ding ◽  
Zhi Quan Huang ◽  
Shi Ming Yu
Keyword(s):  
Finite Element ◽  
Shear Failure ◽  
Material Model ◽  
Small Range ◽  
Element Analysis ◽  
Dam Foundation ◽  
Constitutive Material Model ◽  
Calculation Results ◽  
The Face ◽  
Stress And Deformation

Based on Duncan-Chang’s E-B constitutive material model, the finite element calculating model for a CFRD was established, and has obtained the stress-strain distribution and variety rule at the dam and the face slab in construction period and water store period. The calculation results show that: the stress-deformation behavior of the dam is normal, the deformation values within the acceptable range; the shear failure for the dam is almost impossible; stress concentration and tensile loading on small principal stress was exist on small range of the dam foundation covered by toe slab; the substantially change of water level has great effect on the deformation and camber of the face slabs; the faults structures in dam foundation only has affect the stress distribution of the foundation, but has weak impact of the stress and deformation of the dam body.

The Seismic Performance Simulation Analysis on the Irregular Structure of the Castle Hotel of Dalian

2013 ◽  
Vol 663 ◽  
pp. 80-86
Author(s):  
Hai Qing Liu ◽  
Ming Ji Ma ◽  
Gui Jun Wang
Keyword(s):  
Finite Element ◽  
Seismic Response ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Time History ◽  
Element Model ◽  
Theoretical Research ◽  
Element Analysis ◽  
Disaster Experience ◽  
Irregular Structure

More and more irregular structure appears in people's lives, while the theoretical research and disaster experience show that the irregular structure in the earthquake will produce translation and torsion coupled spatial vibration, and sometimes it will cause very serious consequences. Being based on the practical engineering -the Castle Hotel of Dalian, this text makes use of finite element analysis software--- ANSYS. By analyzing the dynamic characteristics and seismic response, we get the self-vibration characteristics of the structure and the time history curve of top level displacement and acceleration of the structure under the effect of earthquake forces. The calculation results indicate that it is effective and reasonable to set up three-dimensional finite element model used for the analyzing of seismic response by ANSYS.

Finite Element Analysis of a Steady-State Rotating Tire Subjected to Point Load or Ground Contact

1987 ◽  
Vol 15 (4) ◽  
pp. 243-260 ◽  
Author(s):  
R. Kennedy ◽  
J. Padovan
Keyword(s):  
Finite Element ◽  
Steady State ◽  
Contact Point ◽  
Three Dimensional ◽  
Static Problem ◽  
Material Model ◽  
Point Load ◽  
Ground Contact ◽  
Element Analysis ◽  
Automobile Tire

Abstract A radial automobile tire undergoing steady-state rotation is analyzed by a finite element method. A special formulation is used which allows the finite element equations to be solved as a quasi-static problem using static analysis solution procedures, rather than as a dynamic problem requiring solution in the time domain. This is accomplished through a transformation of variable that changes time derivatives, present through inertia, to spatial derivatives. Solution time for the analysis is thereby shortened. The tire is modeled first as a two-dimensional ring on an elastic foundation, then in its full three-dimensional geometry. Rotational speeds are those at which resonance occurs so that the dynamics can be easily visualized and the response easily verified. The models are subjected to point load excitation or ground contact. Point load is used to predict resonance responses of the undamped tire. Results agreed well with experimental measurements. The effect of inertia components and damping on vibrational response of the tire was studied by imposing ground contact at one of the resonance speeds. Damping is included in the model through a two-element Kelvin-Voight viscoelastic material model. Responses of the models were similar to standing wave deformations in a tire.

Three-Dimensional Finite Element Analysis of Clay Core Wall Earth Dam

2013 ◽  
Vol 787 ◽  
pp. 820-824
Author(s):  
Dong Yu Ji
Keyword(s):  
Finite Element ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Earth Dam ◽  
Construction Process ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Clay Core ◽  
Three Dimensional Finite Element ◽  
Calculation Software

This paper adopts universal finite element calculation software to carry out simulation analysis for clay core wall earth dam of Zhongfang reservoir, computer is applied in design and analysis of clay core wall earth dam. Variation laws of clay core wall earth dams stress and displacement in construction process and operational process is researched. The research results are shown: clay core wall earth dam of Zhongfang reservoir is economic and reasonable, structure is safe and reliable, and every index meets the requirements for design.

Dynamic Characteristic Simulation and Analysis of Blade Flutter Based on Finite Element

2013 ◽  
Vol 753-755 ◽  
pp. 973-976
Author(s):  
Li Da Zhu ◽  
Wen Wen Liu ◽  
Ji Jiang Wu ◽  
Shuai Xu ◽  
Peng Cheng Su
Keyword(s):  
Finite Element ◽  
Dynamic Characteristic ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Turbine Engine ◽  
Blade Flutter

Blade is one of the main parts of aircraft engine. Its dynamic characteristics will produce important influence on the work efficiency and the operation reliability of the turbine engine. The paper used the theory of finite element to do modal simulation analysis on the dynamic characteristic of blade flutter, aiming at the phenomenon of serious blade vibration in the process of turbine engine running. Firstly, the paper generated a three-dimensional model by using the software UG. Then the three-dimensional model was leaded into the finite element analysis software ANSYS. Simulation analysis of the model was carried out by using the Workbench module of ANSYS software. Finally, we got the former six order natural frequencies and vibration modes of the blade. In addition, we got the blade's vibration characteristics. The results of the simulation could provide numerical basis for the blades optimization design and vibration safety inspection.

Three-Dimensional Finite Element Analysis of Henggangling Buttress Type Inverted Siphon

2013 ◽  
Vol 804 ◽  
pp. 343-346
Author(s):  
Dong Yu Ji
Keyword(s):  
Finite Element ◽  
Simulation Analysis ◽  
Process Analysis ◽  
Three Dimensional ◽  
Reference Value ◽  
Element Analysis ◽  
Inverted Siphon ◽  
Dimensional Finite Element ◽  
Water Conveyance ◽  
Three Dimensional Finite Element

nverted siphon structure is a common water conveyance buildings, this paper adopts finite element method to carry out three-dimensional finite element simulation analysis for Henggangling buttress type inverted siphon structure. Deducing variation law of the inverted siphons stress and displacement in construction process and operational process. Analysis results further verified that design scheme is reasonable and safe, it has certain reference value. Henggangling buttress type inverted siphon structure is safety, it meets the requirements for engineering.

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