Numerical simulation of multiple 3D fracture propagation using arbitrary meshes

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On the use of quarter-point tetrahedral finite elements in linear elastic fracture mechanics (2015, methodology): “…J-integral and the SIFs using tetrahedral elements are complex, and often suffer from oscillations (Červenka and Saouma, 1997; Rajaram et al., 2000; Paluszny and Zimmerman, 2011), while others require very fine meshes near the crack front, rely on complicated numerical procedures, and are applied…”
A disk-shaped domain integral method for the computation of stress intensity factors using tetrahedral meshes (2015, methodology): “Existing methods to extract J-integrals and SIFs using tetrahedral elements are complex and suffer from oscillations (Červenka and Saouma, 1997; Rajaram et al., 2000; Paluszny and Zimmerman, 2011), while others require very fine meshes near the crack front, rely on complicated numerical procedures, ”
Isogeometric boundary element methods for three dimensional static fracture and fatigue crack growth (2017, background): “As a remedy, the crack fronts need to be smoothed through some numerical techniques [93,94].”