Finite Element Analysis of Hollow Cylinder Test Considering Variation of Wall Thickness

2014 ◽  
Vol 1065-1069 ◽  
pp. 317-320
Author(s):  
Bin Bin Xu ◽  
Toshihiro Noda ◽  
Kentaro Nakai
Keyword(s):  
Hollow Cylinder ◽  
Wall Thickness ◽  
Three Dimensional ◽  
Deformation Analysis ◽  
Cylinder Wall ◽  
Element Analysis ◽  
Uniform Deformation ◽  
Cylinder Test ◽  
Hollow Cylinder Test ◽  
Dimensional Element

Hollow cylinder torsional shear test is simulated regarded as a boundary value problem employing a three-dimensional static/dynamic soil-water coupled finite deformation analysis to investigate the influence of the specimen geometries on apparent behavior concerned in practical experiments. 1) A “Perfect path” which means the response of a single three-dimensional element with uniform deformation is calculated to investigate the effect of non-uniformities on the apparent behavior. As can be seen, only the apparent behavior with thinnest wall thickness coincides with the “Perfect path”, which indicates a uniform deformation inside the thinnest specimen; 2) It was found that when the cylinder wall thickness became smaller, the non-uniformity also decreased correspondingly, which can also be seen in the element behaviors of the thickest specimen; 3) Even thought the non-uniformity in different geometries is quite different, there seem to be no significant influence on the apparent behavior. The reason may lie in the extreme constraint conditions, namely displacement control.

Realization of Uniform Deformation under Three-Dimensional Condition Based on Soil-Water Coupled Analysis Considering Inertia Forces

2014 ◽  
Vol 638-640 ◽  
pp. 530-533
Author(s):  
Bin Bin Xu ◽  
Toshihiro Noda ◽  
Kentaro Nakai
Keyword(s):  
Soil Water ◽  
Three Dimensional ◽  
Coupled Analysis ◽  
Deformation Analysis ◽  
Localized Deformation ◽  
Uniform Deformation ◽  
Soil Skeleton ◽  
Theoretical Considerations ◽  
Inertia Forces ◽  
Dimensional Condition

In the paper, based on soil-water coupled finite deformation analysis, theoretical considerations and numerical calculations were carried out under undrained three-dimensional condition in order to reproduce a uniform deformation field. At first, a theoretical consideration was assumed to realize a uniform deformation for a saturated soil, according to which the initial velocity and acceleration in both vertical and circumferential directions should be applied to each node to remove the influence of inertia effect. This first theoretical analysis is useful and can guide the numerical calculation. Next, the paper realized a uniform deformation of a three-dimensional cylinder specimen under undrained boundary conditions using the soil-water coupled analysis in which the SYS Cam-clay model is employed as the constitutive model for soil skeleton. The numerical results show that without the inertia forces there is no localized deformation in the specimen.

Use of Modified Hollow Cylinder Test in Laboratory for Simulation of Downhole Drilling Condition in Shale

2010 ◽  
Author(s):  
Glenn Kaare Gabrielsen ◽  
Jorn F. Stenebraten ◽  
Olav-magnar Nes ◽  
Rune M. Holt ◽  
Per Horsrud
Keyword(s):  
Hollow Cylinder ◽  
Cylinder Test ◽  
Drilling Condition ◽  
Hollow Cylinder Test

Three-dimensional finite element analysis of effects of roller intervals on tool forces and wall thickness in stagger spinning of thin-walled tube

2012 ◽  
Vol 227 (7) ◽  
pp. 1429-1440 ◽  
Author(s):  
Yong Li ◽  
Jin Wang ◽  
Guo-Dong Lu ◽  
Qi-Song Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wall Thickness ◽  
Three Dimensional ◽  
Element Analysis ◽  
Shape Accuracy ◽  
Tool Force ◽  
Spinning Process ◽  
Force Components ◽  
Three Dimensional Finite Element

Roller intervals are the key parameters of the stagger spinning process, which affect the shape accuracy and productivity of the products. In this article, the effects of different roller intervals in axial and radial directions on tool forces, wall thickness, and strain and stress variations in stagger spinning have been analyzed numerically by the finite element analysis. The results show that with the increasing of the axial roller intervals, the differences between tool force components (axial, radial, and tangential) become lower at first, and then have the trend to be higher. The similar phenomenon on tool force occurs when the radial interval of roller 3 increases and that of roller 2 decreases. Wall thickness variations are mainly affected by axial roller intervals; the bigger the axial intervals are, the higher the variations of wall thickness that would be seen. Meanwhile, the real reductions of wall thickness are mainly affected by radial roller intervals. When the radial interval of roller 3 is larger than that of roller 2, there would be a higher real wall thickness reduction.

Research on Influencing Factors of Welding Residual Stress of Welded Pipes

2014 ◽  
Vol 697 ◽  
pp. 293-297
Author(s):  
Lin Yue Bai ◽  
Ke Bin Jiang ◽  
Lei Gao ◽  
Jing Quan Wang
Keyword(s):  
Residual Stress ◽  
Three Dimensional ◽  
Element Model ◽  
General Purpose ◽  
Welding Residual Stress ◽  
Outer Diameter ◽  
Ansys Software ◽  
Element Analysis ◽  
Pipeline Welding ◽  
Dimensional Element

Analyzing the pipeline sheet of X70 level, the work also establishes three-dimensional element model of pipeline welding with ANSYS (software of large general purpose with finite element analysis). After comparing different plans, changes of outer diameter and wall thickness are found influencing distributing laws of welding residual stress of welded pipes. Thus, the laws are concluded.

Finite Element Analysis for Wall Thickness Variation of Seamless Tube in Stretch Reducing Rolling Process

2011 ◽  
Vol 291-294 ◽  
pp. 532-536 ◽  
Author(s):  
Hui Yu ◽  
Yong Chen ◽  
Xiang Zhong Bai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wall Thickness ◽  
Three Dimensional ◽  
Longitudinal Direction ◽  
Rolling Process ◽  
Thickness Variation ◽  
Analysis Model ◽  
Element Analysis ◽  
Wall Thickness Variation

According to the geometrical characteristic of workpiece and groove in the stretch reducing rolling process, three-dimensional elastic-plastic finite-element analysis model was established to simulate the metal deformation, the regularities of distribution of wall thickness of transverse direction longitudinal direction were investigated. The analysis was verified by comparing finite element analysis results with on-line measurements. The length of crop ends was determined as well as product bore polygonization. The study provides the foundation for analyzing product defeat and instructing technological design.

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