Stress Calculation of Composite Pipe of Multihole Steel Pipe and PE-RT

2011 ◽  
Vol 204-210 ◽  
pp. 2027-2032
Author(s):  
Fei Wang ◽  
Ming Yan ◽  
Guo Wei Wang
Keyword(s):  
Strain Energy ◽  
Axial Stress ◽  
Steel Pipe ◽  
Burst Pressure ◽  
Stress Calculation ◽  
Composite Pipe ◽  
Calculation Results ◽  
Energy Theory

The purpose of this research is to solve stress calculation problem of the composite pipe of multihole steel pipe and polyethylene of raised temperature (PE-RT). The formulas, used to calculate the burst pressure of the composite pipe, were established separately based on three kinds of different strength theories, and also the formula, used to calculate axial stress was developed based on the deviator strain energy theory. The calculation results were compared with the measured values. It shows that the calculation results of formula based on the deviator strain energy theory are very close to the measured values. This conclusion has important meaning to the heating directly buried installation of the composite pipe.

Burst pressure of perforated-steel strip composite pipe

2021 ◽  
pp. 1-12
Author(s):  
Qiang Q. Shao ◽  
Peng Cheng ◽  
Wen S. Liu ◽  
Wen X. Cai ◽  
Zhi P. Han ◽  
...  
Keyword(s):  
Steel Strip ◽  
Burst Pressure ◽  
Composite Pipe

Design Research of Steel Pipe Combination of Angle Steel Tower of XiYue 220kV Cross Section

2013 ◽  
Vol 470 ◽  
pp. 408-411 ◽  
Author(s):  
Yan Zhong Ju ◽  
Xiao Xu Fu ◽  
Neng Xian Zeng
Keyword(s):  
Finite Element Analysis ◽  
Cross Section ◽  
Design Research ◽  
Axial Stress ◽  
Steel Pipe ◽  
Stress Difference ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Angle Steel

Given the path situation of Xiyue substation 220kV four outlets project crossing Shunde waterway section,this article applies of Dao Heng tower full stress analysis software and the finite element analysis software ANSYS to two steel pipe combination of angle steel towers to carry on design research,contrast axial stress of two kinds of software,analyse the reasons of axial stress difference.

The Influence of Raft Foundation Temperature Stress Calculation by Radiation Condition

2014 ◽  
Vol 1021 ◽  
pp. 100-104
Author(s):  
Li Jun Zhao
Keyword(s):  
Temperature Stress ◽  
Radiation Condition ◽  
Influence Of Temperature ◽  
Stress Calculation ◽  
Concrete Crack ◽  
Raft Foundation ◽  
Calculational Method ◽  
Calculation Results

Raft foundation was researched in this paper,basing on the traditional “Wang Tiemeng Method”,the influence of temperature stress calculation by radiation condition was put forward emphatically. According to analysis the two calculation results, obtains the more precise temperature stress calculational method. Consequently the of concrete crack calculation and analysis result can be more precise and reliable.

scholarly journals Evaluation of the nocivity of dent and combination of dent and gouge on burst pressure of steel pipe

2010 ◽  
Vol 6 ◽  
pp. 42023
Author(s):  
M. Allouti ◽  
C. Schmitt ◽  
G. Pluvinage ◽  
M. Lebienvenu
Keyword(s):  
Steel Pipe ◽  
Burst Pressure

scholarly journals Extension of Castigliano’s method for isotropic beams

2020 ◽  
Vol 231 (11) ◽  
pp. 4621-4640
Author(s):  
Juergen Schoeftner
Keyword(s):  
Shear Force ◽  
Strain Energy ◽  
Axial Stress ◽  
Bending Moment ◽  
Axial Direction ◽  
Present Contribution ◽  
Special Cases ◽  
Dummy Load ◽  
Complementary Strain ◽  
Castigliano’S Theorem

Abstract In the present contribution Castigliano’s theorem is extended to find more accurate results for the deflection curves of beam-type structures. The notion extension in the context of the second Castigliano’s theorem means that all stress components are included for the computation of the complementary strain energy, and not only the dominant axial stress and the shear stress. The derivation shows that the partial derivative of the complementary strain energy with respect to a scalar dummy parameter is equal to the displacement field multiplied by the normalized traction vector caused by the dummy load distribution. Knowing the Airy stress function of an isotropic beam as a function of the bending moment, the normal force, the shear force and the axial and vertical load distributions, higher-order formulae for the deflection curves and the cross section rotation are obtained. The analytical results for statically determinate and indeterminate beams for various load cases are validated by analytical and finite element results. Furthermore, the results of the extended Castigliano theory (ECT) are compared to Bernoulli–Euler and Timoshenko results, which are special cases of ECT, if only the energies caused by the bending moment and the shear force are considered. It is shown that lower-order terms for the vertical deflection exist that yield more accurate results than the Timoshenko theory. Additionally, it is shown that a distributed load is responsible for shrinking or elongation in the axial direction.

Prediction of Cylinder Flow Pressures in Mass-Flow Bins Using Minimum Strain Energy

1976 ◽  
Vol 98 (4) ◽  
pp. 1370-1374 ◽  
Author(s):  
A. G. McLean ◽  
P. C. Arnold
Keyword(s):  
Mass Flow ◽  
Strain Energy ◽  
Plane Flow ◽  
Geometry Design ◽  
Numerical Effort ◽  
Minimum Strain Energy ◽  
Flow Pressure ◽  
Energy Theory ◽  
Cylinder Flow ◽  
Complete Variation

Jenike, et al. [1] have presented a minimum strain energy theory to predict cylinder flow pressures in mass-flow bins. The complete variation of strain energy pressures is depicted by bounds requiring considerable numerical effort to develop for a specific cylinder geometry. Design charts are presented, but these are available for only two circular cylinder geometries. This paper summarizes and clarifies the minimum strain energy theory for predicting cylinder flow pressures. A single bound approximation which allows the magnitude of the peak flow pressure to be determined for both axisymmetric and plane flow cylinders is presented. This peak pressure may also be estimated by a single calculation of strain energy pressure. The usefulness and accuracy of these procedures are illustrated by reworking the example presented by Jenike, et al. [1].

Directional Coarsening of γ′ Phase Induced by Phase Transformation Stress

2005 ◽  
Vol 20 (9) ◽  
pp. 2314-2321 ◽  
Author(s):  
K. Zhao ◽  
Y.H. Ma ◽  
L.H. Lou ◽  
Z.Q. Hu
Keyword(s):  
Free Energy ◽  
Phase Transformation ◽  
Uniform Distribution ◽  
Strain Energy ◽  
Coherency Strain ◽  
Preferential Direction ◽  
Nickel Based Superalloy ◽  
Directional Coarsening ◽  
Energy Theory ◽  
Transformation Stress

It was found that directional coarsening was induced by phase transformation stress due to non-uniform distribution of μ phase in an experimental nickel-based superalloy. The mechanism based on the existing diffusion and coherency strain energy theory has been discussed. It was concluded that directional coarsening was the course of dissolving of γ′ portion with high free energy, diffusing and growing on the existed γ′ particles along a preferential direction.

A Study on the Adaptability of Photoelastic Experiment on Main Tower of Cable-Stayed Bridge

2014 ◽  
Vol 587-589 ◽  
pp. 1344-1348
Author(s):  
Zhi Sheng Dong
Keyword(s):  
Finite Element ◽  
Experimental Model ◽  
Experimental Results ◽  
Finite Element Calculation ◽  
Element Calculation ◽  
Stress Calculation ◽  
Cable Stayed Bridge ◽  
Photoelastic Experiment ◽  
Calculation Results ◽  
Stress Experiment

We designed the experimental model of main tower of Tianjin Haihe bridge according to photoelastic experiment theory and proceeded stress experiment at the positions where the stress calculation is precise. Then we compared the experimental results with the finite element calculation results to verify whether the photoelastic experiment fits the stress calculation of main tower of cable-stayed bridge. The experimental results show that the photoelastic experiment could supply gist for the stress calculation of main tower of cable-stayed bridge, which is significant far and wide.

On Energy Strength Theories for Geomaterials

2013 ◽  
Vol 353-356 ◽  
pp. 901-904
Author(s):  
Shou Yi Xue
Keyword(s):  
Energy Density ◽  
Shear Strain ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Volumetric Strain ◽  
Dissipated Energy ◽  
Energy Theory ◽  
Shear Strain Energy ◽  
Shear Energy ◽  
Strain Energy Density Theory

The composition of the energy in the process of material deformation and failure and the relationship between energy and strength were summarized; the features, essences and main problems of the energy release rate theory, the three-shear energy theory and the net shear strain energy density theory were illustrated. It is pointed out that the roles of distortion strain energy, volumetric strain energy and dissipated energy are not identical, especially distortion strain energy and volumetric strain energy must be separately processed. The three-shear energy theory and the net shear strain energy density theory can properly deal with the problems, and also well reflect the intermediate principal stress effect. The above research results can provide references for further discussions.

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