Finite element analysis for castellated steel columns with two different expansion ratio

2012 ◽  
Author(s):  
Xiaowen Yuan ◽  
Fen Liu ◽  
Zhitong Li ◽  
Yuequn Xu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Expansion Ratio ◽  
Element Analysis ◽  
Steel Columns

Finite Element Analysis of Tubular Ovality in Oil Well

2011 ◽  
Vol 264-265 ◽  
pp. 1654-1659 ◽  
Author(s):  
Tasneem Pervez ◽  
Sayyad Zahid Qamar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Petroleum Industry ◽  
Element Model ◽  
Expansion Ratio ◽  
Contact Length ◽  
American Petroleum Institute ◽  
Oil Well ◽  
Element Analysis ◽  
Inner Diameter

This paper presents the finite element analysis of tubular expansion in oval bore holes such as those frequently observed in Upper Natih reservoirs. The minimum inner diameter of the expanded tubular must be larger than the drift diameter set by American Petroleum Institute (API) standards. If the minimum inner diameter is smaller than drift diameter, completion equipments can not be run successfully, which is necessary to complete an oil-well for production. The phenomenon of tubular ovality has been previously unknown to petroleum industry. Finite element model of tubular expansion in oval bore-holes is developed to determine the tubular ovality and compared with measured ovality. It was found that ovality increases linearly with tubular expansion ratio. With increase in expansion ratio, the tubular contact length with formation and developed contact pressure increases. Tubular ovality, if not considered in well design, may lead to premature tubular failure due to lower collapse rating and higher stresses.

Finite Element Analysis on Hysteretic Behavior of Aluminium Columns under Cyclic Loading

2014 ◽  
Vol 1049-1050 ◽  
pp. 264-267
Author(s):  
Zheng Zhang ◽  
Yong Qian Zheng ◽  
Xue Chao Chen ◽  
Zhi Bin Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cyclic Loading ◽  
Geometrical Nonlinearity ◽  
Initial Imperfection ◽  
Hysteretic Behavior ◽  
Constitutive Relationship ◽  
Low Carbon ◽  
Element Analysis ◽  
Steel Columns

The mechanical properties of axial compression aluminium members under cyclic loading were studied and compared with those of steel columns. In order to proceed to theoretical study on hysteretic behavior of aluminium columns, a method by finite element analysis was proposed. The method was based on FEA software, ANSYS. The analysis methods considered the effects of material nonlinearity, geometrical nonlinearity and initial imperfection. On this basis, hysteretic curves, reversal skeleton curves and stiffness degradation curves of 6061-T6 aluminium columns, 6061-T4 aluminium columns and Q235 steel columns under axial cyclic loading were obtained and compared. Results show that the hysteretic behavior of the aluminium columns is similar with the low carbon steel columns and is significantly influenced by constitutive relationship.

Sign in / Sign up

Export Citation Format

Share Document