Modeling and Analysis of Arbitrarily Shaped Three-Dimensional Cracks

임의 형태의 삼차원 균열 모델링 및 해석

  • Park, Jai-Hak (Dept. of Safety Engineering, Chungbuk Nat'l Univ.) ;
  • Nikishkov, G.P. (The University of Aizu)
  • 박재학 (충북대학교 안전공학과) ;
  • Received : 2011.04.18
  • Accepted : 2011.07.15
  • Published : 2011.09.01


The SGBEM-FEM alternating method has been known to be a very effective method for analyzing threedimensional cracks in a finite body. The accurate values of the stress intensity factor can be obtained for a general planar or nonplanar three-dimensional crack. In the existing method, eight-noded quadrilateral boundary elements are used to model a crack. In some cases, three-node triangle boundary elements are more convenient for the modeling of a crack with a general shape. In this study, a crack is modeled with three-noded triangular and seven-noded quadrilateral elements by using the advancing-front mesh generation method. The stress intensity factors are obtained for cracks with several shapes and the accuracy of results is examined.


Three-dimensional Crack;Stress Intensity Factor;Mesh Generation;Symmetric Galerkin Boundary Element Method


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