The Coffin-Manson law as a consequence of the statistical nature of the LCF surface damage

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(92)90146-6· OSTI ID:6907037

Brechet, Y; Magnin, T; Sornette, D ^[1]

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1. Grenoble, Ecole Nationale Superieure d'Electrochimie et d'Electrometallurgie, Saint-Martin-d'Heres (France) Lille I, Universite, Villeneuve-d'Ascq (France) Nice, Universite, (France)

The transition between the Coffin-Manson law in low cycle fatigue and the Basquin law in high cycle fatigue is shown to be closely related to the microstructural aspects of damage accumulation in the two different fatigue domains. In LCF, the surface extension of microcracks is predominant whereas their bulk propagation is dominating in HCF. Along these lines, the Coffin-Manson law is derived using standard methods of statistical physics of disordered systems. The university of the Coffin-Manson exponent for single-phased materials is shown to be a direct consequence of the statistical nature of damage accumulation due to the growth and the interaction of surface microcracks. 22 refs.

• OSTI ID: 6907037
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 40:9; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
CRACKS
CRYSTAL STRUCTURE
DAMAGE
DEFORMATION
FATIGUE
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PLASTICITY