Stress intensity factor analyses of interacting elliptical cracks using line-spring boundary element method

The authors have developed a new line-spring boundary element method which couples the line-spring model with the boundary element method to deal with the problem of a surface cracked plate. However, the drawback of the line-spring model is that a reliable stress intensity factor could not be directly obtained near the free surface intersection. Therefore, the virtual crack extension technique is employed in a post-processor of the line-spring boundary element method to obtain the stress intensity factor at the crack front-free surface intersection. Theoretical analysis is described. Stress intensity factors for surface cracks are calculated to verify the proposed method. The interaction of two surface cracks is also investigated. The solutions obtained by the line-spring boundary element method show that the method proposed is efficient and reasonably accurate. Nomenclature a a ( x ) = A = C Ci, j = d = E = ERRT = F = FA, Fs, Fc, Ft, Fb = G = H = g~ = LSBEM = LSFEM = M n = M t M r =

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Analysis of surface cracks using the line-spring boundary element method and the virtual crack extension technique

Zeng

Dai

Yang

1993

Int J Fract

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Assessment of creep interaction of double elliptical cracks at elevated temperatures using numerical analysis

Zhao

Jing

2017

Arch Appl Mech

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Mixed-mode stress intensity factors for interacting semi-elliptical surface cracks in a plate

Stonesifer

Brust

Leis

1993

Engineering Fracture Mechanics

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Stress intensity factor analyses of interacting elliptical cracks using line-spring boundary element method

Cited by 15 publications

References 7 publications

Analysis of surface cracks using the line-spring boundary element method and the virtual crack extension technique

Analysis of surface cracks using the line-spring boundary element method and the virtual crack extension technique

Assessment of creep interaction of double elliptical cracks at elevated temperatures using numerical analysis

Mixed-mode stress intensity factors for interacting semi-elliptical surface cracks in a plate

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