Influence of Crack Front Shape on 3D Numerical Modelling of Plasticity-Induced Closure of Short and Long Fatigue Cracks

S. Fiordalisi; C. Gardin; C. Sarrazin-Baudoux; M. Arzaghi; Jean Petit

doi:10.4028/www.scientific.net/KEM.577-578.213

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 577-578Influence of Crack Front Shape on 3D Numerical...

Influence of Crack Front Shape on 3D Numerical Modelling of Plasticity-Induced Closure of Short and Long Fatigue Cracks

Abstract:

The simultaneous effect of crack length and crack front shape on plasticity-induced crack closure (PICC) for a 304L austenitic stainless steel is simulated through 3D numerical modelling using finite element software Abaqus for through-thickness cracks with different curved crack fronts in CT specimens in comparison with bidimensional through crack with a straight front. The influence of possible loading history effect is avoided by applying constant K amplitude. The local stress intensity factor range for crack opening K_op is evaluated from the simulation of the loss of the last local contact between the crack lips near the crack tip. The pertinence of the different crack front shapes is discussed in term of the effective stress intensity factor range K_eff and in comparison with the experimental crack front observations.

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Periodical:

Key Engineering Materials (Volumes 577-578)

Pages:

213-216

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.577-578.213

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Online since:

September 2013

Authors:

S. Fiordalisi, C. Gardin, C. Sarrazin-Baudoux, M. Arzaghi, Jean Petit

Keywords:

Crack Shape, CT Specimen, Plasticity-Induced Fatigue Crack Closure, Short Crack, Stainless Steel (SS), Three-Dimensional Finite Element Analysis

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