Crack modeling in FE analysis of circular tubular joints

By mapping circles in two-dimensional planes to three-dimensional intersection curves between tubular members, a complicated three-dimensional mesh generating procedure for tubular joints is changed to a procedure similar to a two-dimensional case. More detailed modeling of welds and cracks can be i...

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Bibliographic Details
Published in:Engineering fracture mechanics 1998-11, Vol.61 (5), p.537-553
Main Authors: Cao, J.J., Yang, G.J., Packer, J.A., Burdekin, F.M.
Format: Article
Language:English
Subjects:
Crack growth modeling
Crack modeling
Cracked tubular joints
Finite element analysis
Mesh generation
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Summary:By mapping circles in two-dimensional planes to three-dimensional intersection curves between tubular members, a complicated three-dimensional mesh generating procedure for tubular joints is changed to a procedure similar to a two-dimensional case. More detailed modeling of welds and cracks can be included to analyze the fracture behavior of cracked tubular joints. Different types of crack tip models are discussed and a four-tip crack model is introduced to model crack propagation. These crack models can be applied to both through-thickness cracks and surface cracks. A procedure for transforming crack elements around a plane curve into crack elements for a doubly curved semi-elliptical surface crack around an intersection is also introduced. High-quality meshes can be obtained.
ISSN:0013-7944
1873-7315
DOI:10.1016/S0013-7944(98)00091-5