Sensitivity of Equivalent Load Crack Propagation Life Assessment to Cycle-Counting Technique

E Le Pautremat; M Olagnon; A Bignonnet

doi:10.1520/STP13958S

SYMPOSIA PAPER Published: 01 January 1994

STP13958S

Sensitivity of Equivalent Load Crack Propagation Life Assessment to Cycle-Counting Technique

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The purpose of the present study is to assess a simple prediction method for the fatigue life of structures subjected to variable amplitude loading, and to validate it in the whole range of possible irregularity factors.

This method based on an equivalent load concept (reducing the load history to constant amplitude cycles) leads to a fair prediction of fatigue life with few parameters.

Five cycle-counting methods were compared as to the determination of the equivalent load amplitude. The tests were carried out with several histories chosen either for their specific irregularity factors or to be relevant to offshore structures (WASH(W) sequence).

Author Information

Le Pautremat, E

Institut de Recherche de la SIDèrurgie, Saint Germain en Laye, France

Olagnon, M

Institut Français de Recherche et d'Exploitation sur la MER, Direction Ingénierie, Technologie et Informatique, Plouzane, France

Bignonnet, A

Peugeot SA. Chemin de la Malmaison, Bièvre, France

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Developed by Committee: E08

Pages: 353–366

DOI: 10.1520/STP13958S

ISBN-EB: 978-0-8031-5283-0

ISBN-13: 978-0-8031-1985-7

Sensitivity of Equivalent Load Crack Propagation Life Assessment to Cycle-Counting Technique

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