Influence of the loading path on fatigue crack growth under mixed-mode loading

Fatigue crack growth tests were performed under various mixed-mode loading paths, on maraging steel. The effective loading paths were computed by finite element simulations, in which asperity-induced crack closure and friction were modelled. Application of fatigue criteria for tension or shear-domin...

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Bibliographic Details
Published in:International journal of fracture 2009-10, Vol.159 (2), p.219-232
Main Authors: Doquet, V., Abbadi, M., Bui, Q. H., Pons, A.
Format: Article
Language:English
Subjects:
Asperity
Automotive Engineering
Characterization and Evaluation of Materials
Chemistry and Materials Science
Civil Engineering
Classical Mechanics
Computation
Computer simulation
Crack closure
Crack propagation
Crack tips
Criteria
Engineering Sciences
Exact sciences and technology
Fatigue failure
Fatigue tests
Finite element method
Fracture mechanics
Fracture mechanics (crack, fatigue, damage...)
Friction
Fundamental areas of phenomenology (including applications)
Inelasticity (thermoplasticity, viscoplasticity...)
Maraging steels
Materials Science
Mathematical analysis
Mechanical Engineering
Mechanics
Mechanics of materials
Original Paper
Physics
Solid mechanics
Strain
Structural and continuum mechanics
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Summary:Fatigue crack growth tests were performed under various mixed-mode loading paths, on maraging steel. The effective loading paths were computed by finite element simulations, in which asperity-induced crack closure and friction were modelled. Application of fatigue criteria for tension or shear-dominated failure after elastic–plastic computations of stresses and strains, ahead of the crack tip, yielded predictions of the crack paths, assuming that the crack would propagate in the direction which maximises its growth rate. This approach appears successful in most cases considered herein.
ISSN:0376-9429
1573-2673
DOI:10.1007/s10704-009-9396-6