Numerical Simulation Key Technical Research of Hot Bend-Forming of Auto Windshield

2011 ◽  
Vol 130-134 ◽  
pp. 2207-2210
Author(s):  
Qing Ling Zhang ◽  
Yan Guo Shi ◽  
Yuan Yuan Wen ◽  
Yan Hua Tang ◽  
Jing Bo
Keyword(s):  
Numerical Simulation ◽  
Strain Distribution ◽  
Three Dimensional ◽  
Stress And Strain ◽  
Comparison Result ◽  
Forming Process ◽  
Simulation Process ◽  
Dynamic Display ◽  
Deformation Work ◽  
Stress And Strain Distribution

Three-dimensional simplified model of auto windshield, mold, hot ring and quench ring was built using UG software in this article. Hot bend-forming numerical simulation process of auto windshield was reserched based on Show-implicit sequence solving algorithm. Finite element dynamic display simulation of press and drop forming and rebound deformation work step were finished. Distortion status, stress and strain distribution in forming process could be real-time displayed. It compared measured value and simulated value in two ways (bending depth and rebound rate) in the three groups product samples randomly selected.The comparison result proved the veracity of numerical simulation result. It had certain actual production guiding significance.

Study on Stress and Strain of Anchorage Using Finite Element Method

2013 ◽  
Vol 325-326 ◽  
pp. 1314-1317
Author(s):  
Cong Sheng Chen ◽  
Ping He ◽  
Cheng Yong Wang ◽  
Xue Hui Chen ◽  
Lei Huang ◽  
...  
Keyword(s):  
Finite Element ◽  
Strain Distribution ◽  
Maximum Stress ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Integrated Modeling ◽  
Stress And Strain ◽  
Steel Strand ◽  
Prestressed State ◽  
Stress And Strain Distribution

Three-dimensional integrated modeling method and the numerical simulation of elastoplastic finite element are adopted in the paper. The mechanical response of the five holes anchorage is analyzed in certain prestressed state. The stress and strain distribution information of the anchor ring, clip and steel strand is obtained respectively, and the structure safety is discussed by investigating on the maximum stress and strain.

The Structural Implications of a Unilateral Facial Skeletal Cleft: A Three-Dimensional Finite Element Model Approach

2008 ◽  
Vol 45 (2) ◽  
pp. 121-130 ◽  
Author(s):  
Linping Zhao ◽  
Jean E. Herman ◽  
Pravin K. Patel
Keyword(s):  
Strain Distribution ◽  
Skeletal Development ◽  
Three Dimensional ◽  
Element Model ◽  
Stress And Strain ◽  
Midsagittal Plane ◽  
Dimensional Finite Element ◽  
Asymmetric Stress ◽  
Three Dimensional Finite Element ◽  
Stress And Strain Distribution

Objective: For children born with a unilateral facial skeletal cleft, oral motor function is impaired and skeletal development and growth are asymmetrical with regard to the midsagittal plane. This study was designed to verify that a unilateral skeletal cleft and its dimensions (i.e., depth and width) affect the severity of the asymmetric stress and strain distribution within the maxilla. Methods: A three-dimensional finite element model of a normal maxilla was developed from pediatric, subject-specific computerized tomography scan data. A clefting pattern then was introduced to simulate varying degrees of deformity in geometry, with the bone properties and boundary conditions held constant. The asymmetric index was introduced to quantify the asymmetrical stress and strain distribution within the maxilla with regard to the midsagittal plane. Results: The unilateral skeletal cleft led to a nonuniform, asymmetric stress and strain distribution within the maxilla: intensified on the noncleft side and weakened on the cleft side. As the depth of the unilateral cleft increased, the stress and strain distribution became increasingly asymmetric as measured by the asymmetric index. In contrast, the width of the cleft had minimal effect on the asymmetrical stress and strain distribution. Interpretation/conclusion: These results implied that a child born with a unilateral cleft would be expected to have an asymmetric skeletal development between the noncleft and the cleft sides as a consequence of an asymmetric functional loading pattern.

Stress Distribution Around a Circular Bar, With Flat and Spherical Ends, Embedded in a Matrix in a Triaxial Stress Field

1970 ◽  
Vol 37 (3) ◽  
pp. 578-586 ◽  
Author(s):  
V. J. Parks ◽  
A. J. Durelli ◽  
K. Chandrashekhara ◽  
T. L. Chen
Keyword(s):  
Stress Distribution ◽  
Stress Field ◽  
Strain Distribution ◽  
Three Dimensional ◽  
Triaxial Stress ◽  
The Other ◽  
Elastic Matrix ◽  
Stress And Strain ◽  
Circular Bar ◽  
Stress And Strain Distribution

This paper deals with the stress and strain distribution around a circular bar embedded in a matrix and subjected to a mechanically applied triaxial load. The three-dimensional “freezing” technique of photoelasticity was used. The results obtained correspond to the case of a rigid circular bar embedded in a homogeneous, elastic matrix. Two models were analyzed; in one, the axis of the circular bar was parallel to the direction of the loading and, in the other, the axis of the circular bar was normal to the direction of loading. By combining the results obtained independently for these two cases, stress and strain distribution around the circular bar for various ratios of triaxial load can be obtained.

Numerical Simulation of Al Ball Forming Process in Skew Rolling

2011 ◽  
Vol 704-705 ◽  
pp. 151-154 ◽  
Author(s):  
Xiao Min Shi ◽  
Bao Jian Wang
Keyword(s):  
Numerical Simulation ◽  
Key Words ◽  
Three Dimensional ◽  
Stress And Strain ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Forming Process ◽  
Characteristic Curves ◽  
Skew Rolling

According to the equation of pass surface in skew rolling, the characteristic curves are obtained by VC++ programming, a three-dimensional model of the roller is constructed by using of modeling function of Pro/E software, it is done for numerical simulation of Φ21.6mm Al ball forming process in skew rolling by means of ANSYS6.0 software, the stress and strain distributions are obtained in this simulation. It provides the important foundation for the design of dies and making clear the cause of the rolled piece inner defect. Key words: Skew rolling; Numerical simulation; Pro/E modeling; Al ball

Effect of pipe expansion on the redistribution of residual stresses after molding

2020 ◽  
Vol 10 (2) ◽  
pp. 122-126
Author(s):  
Nikolay A. Makhutov ◽  
◽  
Dmitry A. Neganov ◽  
Eugeny P. Studenov ◽  
◽  
...  
Keyword(s):  
Residual Stresses ◽  
Strain Distribution ◽  
Strain State ◽  
Stress And Strain ◽  
Cylindrical Shape ◽  
Pipe Material ◽  
Pipe Expansion ◽  
Calculation Results ◽  
Residual Deformations ◽  
Stress And Strain Distribution

In the factory, pipes for trunk oil and oil product pipelines are obtained by molding and welding. To ensure a cylindrical shape and reduce technological residual stresses, expansion technology is used. Pipe expansion causes a significant change in the values of residual deformations and stresses. The article presents both the calculation results and graphs regarding stress and strain distribution during bending of the stock and their redistribution after expansion. Based on the calculation results, the final total values of residual stresses and residual deformations caused by bending and expansion were stated to be important components of the stress-strain state observed in pipelines being operated under cyclic loading, as well as those used in assessing how degradation affects the ductility of the pipe material. These factors were concluded as being reasonably taken into account when performing verification calculations regarding long-running pipelines if, based on their diagnostics and analysis, their state does not meet modern strength requirements.

Finite Element Analysis of Metal Flow of Finishing Groove in Hot Continuous Rolling Bar

2012 ◽  
Vol 510 ◽  
pp. 667-672
Author(s):  
Jia Lin Zhou ◽  
Chen Gang Pan ◽  
Xiao Yong Zhang
Keyword(s):  
Strain Distribution ◽  
Metal Flow ◽  
Dimensional Accuracy ◽  
Stress And Strain ◽  
Fe Model ◽  
Element Analysis ◽  
Iron And Steel ◽  
Expansion Angle ◽  
The Stability ◽  
Stress And Strain Distribution

This article established 3D FE model of dual-radius arc finishing groove and tangent expansion angle finishing groove using ANSYS / LS-DYNA software for Wuhan Iron and Steel plant Ф16 hot continuous bar, and analyzed metal flow pattern, stress and strain distribution of two types finishing grooves. The results show that surface stress and strain distribution of dual-radius arc finishing groove have better uniform than them of tangent expansion angle finishing groove, and dual-radius arc finishing groove ensures the stability of the rolled piece in finishing groove, improve the dimensional accuracy and surface quality of rolled finishing product.

Lightweight Design of Shipbuilding Gantry Crane Structure Based on FEA

2011 ◽  
Vol 474-476 ◽  
pp. 131-136 ◽  
Author(s):  
Ming Liang Yang ◽  
Ge Ning Xu ◽  
Zheng Yan Chang
Keyword(s):  
Strain Distribution ◽  
Large Scale ◽  
Lightweight Design ◽  
Metal Structure ◽  
Structure Design ◽  
Gantry Crane ◽  
Stress And Strain ◽  
Analytical Computation ◽  
Structural Improvement ◽  
Stress And Strain Distribution

For the sake of working safely and stable, large-scale shipbuilding gantry crane was designed based on the principle of metal structure:3S,Strength,Stiffness,Stability. The detailed finite element analytical computation was successfully carried out on this structure, the stress and strain distribution of this structure were obtained under various actual operations. On the basis of it, the structural improvement was carried out, the result of design indicated that the stress was evident and the weight was lightened. This laid a foundation for the structure design of large-scale shipbuilding gantry crane.

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