Sociedad Española de Integridad Estructural
Grupo Español de Fractura

Sociedad Española de Integridad Estructural
Grupo Español de Fractura

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A NEW STRESS METHODOLOGY UNDER MULTIAXIAL LOADING CONDITIONS FOR FATIGUE LIFE EVALUATION

Vitor Anes  Luis Reis  Bin Li  Manuel Fonte  M. de Freitas    

Anales de la Mecánica de la Fractura, nº 30 . 2013 . Pág. 205 -210
Ver (.pdf): Anales30-035

Resumen: In this work is performed a series of multiaxial fatigue tests on a high-strength steel in order to determine a multiaxial fatigue strength under proportional and non-proportional loading conditions. A stress scale factor function (ssf) was mapped based on the experimental results using as arguments, the axial stress amplitude and the stress amplitude ratio, which has proven to be sensitive to the loading path nature. An equivalent stress was defined using the stress scale factor surface and used in the fatigue life correlation. Results indicate that the stress scale factor is not a constant value and is strongly dependent on stress amplitude level and loading path shape. The equivalent stress was successfully applied to proportional and non-proportional loading path with satisfactory results.

LocalizaciónToledo

ICEMS & Dept. of Mechanical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
ICEMS & Dept. of Mechanical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
ICEMS & Dept. of Mechanical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
Escola Superior Náutica Infante D.Henrique. Av. Eng. Bonneville Franco, 2770-058 Oeiras, Portugal
ICEMS & Dept. of Mechanical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.


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