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1. Clarifications and terminology
Fatigue refers to the gradual damage caused to structural details by fluctuating or repeated stresses, leading to the development of cracks that can cause them to fail.
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All structural details susceptible to fatigue must be identified and fatigue-tested.
In the case of a smooth part, cracking can originate from microscopic grain-scale defects, or from edge defects caused by flame cutting or drilling, for example.
In the case of welded constructions, there are always defects due to the weld: in this case, it's rather from a weld bead that a crack can start.
Note :if crack initiation is expected at the root of the weld bead, finishing treatments can delay this phase and thus considerably...
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Clarifications and terminology
Principles of fatigue testing
Bibliography
Standards and norms
- Structural Eurocodes – Bases de calcul des structures, AFNOR - AFNOR NF EN 1990 (P06-100-1) - Mars 2003
- Execution of steel and aluminum structures – Part 2: technical requirements for the execution of steel structures, AFNOR - AFNOR NF EN 1090-2+A1 (P22-101-2) - octobre 2011
- Eurocode 1 "Actions on structures – Part 1-4: General actions – Wind actions, AFNOR - AFNOR NF EN 1991-1-4 (P06-114-1) - novembre 2005 ...
Websites
CEREMA – Centre d'études et d'expertise sur les risques, la mobilité et l'aménagement (Center for studies and expertise on risks, mobility and development)
IFSTTAR – Institut français des sciences et techniques des transports de l'aménagement et des réseaux
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