Abstract
A three-dimensional six-noded prism (wedge) finite element containing a singularity of order λ is developed. The interpolation functions of the displacement allow for variations proportional to the power λ of the distance from the crack front along the crack surface and to the distance in the perpendicular direction. The element is compatible with standard wedge (6-noded) and brick (8-noded) isoparametric elements. Three problems are studied to examine the proposed element, namely, a penny-shaped crack in a cylinder, an edge crack in an homogeneous material, and a crack perpendicular to a bimaterial interface.
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Abdel Wahab, M.M., De Roeck, G. A 3-D six-noded finite element containing a λ singularity. Int J Fract 70, 347–356 (1994). https://doi.org/10.1007/BF00032452
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DOI: https://doi.org/10.1007/BF00032452