Interaction integral procedures for 3-D curved cracks including surface tractions

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Extended finite element method with global enrichment (2015, methodology): “[55] a procedure is introduced to accurately integrate this term, in the present case however it is impossible to implement this procedure as the FE mesh does not conform to the crack geometry.”
An interaction integral method for 3D curved cracks in nonhomogeneous materials with complex interfaces (2010, methodology): “As a result of the above analysis, it is interesting to find that compared with the integral I given by Walters et al. (2005, 2006) for nonhomogeneous materials, the expression in Eq.”
A well‐conditioned and optimally convergent XFEM for 3D linear elastic fracture (2016, methodology): “[55] would be possible to implement, making the evaluation of this integral more accurate.”
A disk-shaped domain integral method for the computation of stress intensity factors using tetrahedral meshes (2015, methodology): “Interaction integral methods are perhaps the most accurate, reliable and readily implementable methods to extract SIFs in mixed-mode 2D and 3D crack problems (Walters et al., 2005; Banks-Sills, 2010; Bremberg and Faleskog, 2015).”