A Parametric Study on the Strain Concentration in Field Joint of Concrete Coated Pipelines Using Finite Element Method

2009 ◽  
Author(s):  
Nikzad Nourpanah ◽  
Farid Taheri
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Parametric Study ◽  
Concentration Factor ◽  
Geometrical Parameters ◽  
Fe Method ◽  
Strain Concentration ◽  
Finite Element Approach ◽  
Geometrical Properties ◽  
Element Approach

This paper aims at investigating the strain concentration in the field joints of concrete coated pipelines. A parametric study, using the finite element (FE) method, is conducted to investigate the effect of different geometric and material related parameters on the strain concentration. The selected parameters are believed to be the most influencing ones, and their variations selected as such, so to reflect practical situations. The finite element approach used in this study was discussed and validated by the authors in their earlier work. In this study, twenty three FE models are analyzed and their results are processed and presented in terms of variation of Strain Concentration Factor (SCF) versus the considered parameters, thus enabling us to examine the trend of variation of SCF with respect to each parameter. The observed trends and their underlying mechanics are described. Furthermore, a non-dimensional “geometric parameter” is introduced, which lumps the geometrical parameters investigated into a single parameter, such that it could adequately describe the variations of SCF. It is observed that a threshold exists for this parameter, beyond which the SCF can be deemed constant for design purposes, and below which the SCF would become very sensitive to the geometrical properties.

scholarly journals A new multifield finite element method in steady state heat analysis

2005 ◽  
Vol 9 (1) ◽  
pp. 111-130 ◽  
Author(s):  
Dubravka Mijuca ◽  
Ana Ziberna ◽  
Bojan Medjo
Keyword(s):  
Finite Element Method ◽  
Heat Flux ◽  
Finite Element ◽  
Thermal Loading ◽  
Mixed Finite Element ◽  
Finite Element Approach ◽  
Benchmark Tests ◽  
Element Approach ◽  
Steady State Heat ◽  
Solid Bodies

A new original primal-mixed finite element approach and related hexahedral finite element HC:T/q for the analysis of behavior of solid bodies under thermal loading is presented. The essential contributions of the present approach is the treatment of temperature and heat flux as fundamental variables that are simultaneously calculated, as well as capability to introduce initial and prescribed temperature and heal flux. In order to minimize accuracy error and enable introductions afflux constraints, the tensorial character of the present finite element equations is fully respected. The proposed finite element is subjected to some standard benchmark tests in order to test convergence of the results, which enlighten the effectiveness and reliability of the approach proposed.

A Finite Element Approach for Nonhomogeneous Nonlocal Elastic Problems

2008 ◽  
Author(s):  
Aurora Pisano ◽  
Alba Sofi ◽  
Paolo Fuschi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Nonlocal Elasticity ◽  
Elastic Moduli ◽  
Strain Difference ◽  
Relevant Literature ◽  
Stiffness Tensor ◽  
Finite Element Approach ◽  
Numerical Examples ◽  
Element Approach

The paper deals with the implementation of a method, known in the relevant literature as Nonlocal Finite Element Method, for solving 2D boundary value problems in the context of nonhomogeneous nonlocal elasticity. The method, founded on a consistent thermodynamic formulation, is here improved making use of a phenomenological strain-difference-based nonhomogeneous nonlocal elasticity model. The latter assumes a two components local/nonlocal constitutive relation in which the stress is conceived as the sum of two contributions governed by the standard elastic moduli tensor and by a nonlocal stiffness tensor, respectively. Two numerical examples are presented and the obtained results are discussed both to verify the reliability of the method and to show its potential and limits for the analysis of nonhomogeneous nonlocal elastic problems.

New Results on Mesh Adaptation in Space-Time Finite Element Method

2002 ◽  
Author(s):  
Hector Adelaide ◽  
Claude Bohatier ◽  
Franck Jourdan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Contact Problem ◽  
Frictional Contact ◽  
Space Time ◽  
Mesh Adaptation ◽  
Finite Element Approach ◽  
Element Approach ◽  
Adaptation Method ◽  
Element Method

In this paper, a new mesh adaptation method which deals with a space-time finite element approach is proposed to solve frictional contact contitions. Firstly, this method is performed on an elementary elastodynamic example and on a contact problem.

Vibration Analysis of a Cantilevered Beam with Spring Loading at the Tip as a Generic Elastic Structure

2014 ◽  
Vol 629 ◽  
pp. 407-413 ◽  
Author(s):  
Mohammad Jafari ◽  
Harijono Djojodihardjo ◽  
Kamarul Arifin Ahmad
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Vibration Analysis ◽  
Equation Of Motion ◽  
Bernoulli Beam ◽  
Fundamental Vibration ◽  
Finite Element Approach ◽  
Cantilevered Beam ◽  
Element Approach ◽  
Euler Bernoulli Beam

Although fundamental, vibration of a cantilevered Euler-Bernoulli beam with spring attached at the tip is not found in literatures and is here solved analytically and numerically using finite element approach. The equation of motion of the beam is obtained by using Hamilton’s principle. Finite element method is utilized to write in-house program for the free vibration of the beam. Results show plausible agreements.

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