Header menu link for other important links
X
Coupled EFGM and F2LFEM for fracture analysis of cracks
K. N. Rajesh,
Published in
2010
Volume: 5
   
Pages: 293 - 303
Abstract
This paper presents a coupling technique for integrating the element-free Galerkin method (EFGM) with fractal two-level finite element method (F2LFEM) for analyzing homogeneous, isotropic, and two dimensional linear-elastic cracked structures subjected to mixed-mode (modes I and II) loading conditions. F2LFEM is adopted for discretization of domain close to the crack tip and EFGM is adopted in the rest: of the domain. In the transition region interface elements arc employed. The shape functions within interface elements which comprises both the element-free Galerkin and the finite element shape functions, satisfies the consistency condition thus ensuring convergence of the proposed method. The proposed method combines the best features of EFGM and F2LFEM, in the sense that no structured mesh or special enriched basis functions are necessary and no post-processing (employing any path independent integrals) is needed to determine fracture parameters such as stress-intensity factors (SIFs) and T - stress. The numerical results show that SIFs and T - stress obtained using the proposed method are in excellent agreement with the reference solutions for the structural and crack geometries considered in this study. Also a parametric study is carried out to examine the effects of the similarity ratio, and the number of transformation terms on the quality of the numerical solutions. Copyright © 2009 by ASME.
About the journal
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
ISSN0277027X
Open AccessNo
Concepts (36)
  •  related image
    Basis functions
  •  related image
    CONSISTENCY CONDITIONS
  •  related image
    COUPLING TECHNIQUES
  •  related image
    CRACK GEOMETRIES
  •  related image
    CRACKED STRUCTURES
  •  related image
    Discretizations
  •  related image
    ELEMENT-FREE
  •  related image
    Element-free galerkin method
  •  related image
    FINITE ELEMENT SHAPE FUNCTIONS
  •  related image
    FRACTURE ANALYSIS
  •  related image
    FRACTURE PARAMETER
  •  related image
    Galerkin
  •  related image
    Interface elements
  •  related image
    Loading condition
  •  related image
    Mixed mode
  •  related image
    Numerical results
  •  related image
    Numerical solution
  •  related image
    Parametric study
  •  related image
    PATH-INDEPENDENT INTEGRALS
  •  related image
    Post processing
  •  related image
    REFERENCE SOLUTION
  •  related image
    Shape functions
  •  related image
    SIMILARITY RATIO
  •  related image
    STRUCTURED MESH
  •  related image
    T STRESS
  •  related image
    Transition regions
  •  related image
    Boilers
  •  related image
    Caissons
  •  related image
    Computational mechanics
  •  related image
    Crack tips
  •  related image
    Finite element method
  •  related image
    Function evaluation
  •  related image
    Galerkin methods
  •  related image
    Pressure vessels
  •  related image
    Stress intensity factors
  •  related image
    Number theory