In the present paper, a high-cycle critical plane-based multiaxial fatigue criterion is employed to evaluate the multiaxial fatigue strength of smooth metallic specimens subjected to biaxial cyclic loading. According to such a criterion, the critical plane orientation is correlated to the weighted mean directions of the principal stresses, and the multiaxial fatigue strength is assessed through an equivalent stress expressed by a quadratic combination of the shear stress amplitude and the amplitude of an equivalent normal stress acting on the critical plane. The criterion is a modified version of the original Carpinteri-Spagnoli (C-S) criterion. The proposed modifications are related to: the weighting procedure of the principal stress axes; the definition of the equivalent normal stress by taking into account the mean normal stress effect; the expression of the quadratic combination of stresses. Several high-cyle fatigue strength results for smooth metallic specimens, subjected to in-phase or out-of-phase biaxial loading with different loading ratios and mean stress values, are analysed by employing the C-S criterion, its modified version, and other criteria available in the literature.

Fatigue assessment of smooth metallic specimens using a simplified multiaxial criterion based on a critical plane approach / CARPINTERI, Andrea; BRIGHENTI, Roberto; SPAGNOLI, Andrea; VANTADORI, Sabrina. - (2010), pp. 867-874. (Intervento presentato al convegno 9th International Conference on Multiaxial Fatigue & Fracture (ICMFF9) tenutosi a Parma (Italy) nel 7-10 June 2010).

Fatigue assessment of smooth metallic specimens using a simplified multiaxial criterion based on a critical plane approach

BRIGHENTI, Roberto;
2010

Abstract

In the present paper, a high-cycle critical plane-based multiaxial fatigue criterion is employed to evaluate the multiaxial fatigue strength of smooth metallic specimens subjected to biaxial cyclic loading. According to such a criterion, the critical plane orientation is correlated to the weighted mean directions of the principal stresses, and the multiaxial fatigue strength is assessed through an equivalent stress expressed by a quadratic combination of the shear stress amplitude and the amplitude of an equivalent normal stress acting on the critical plane. The criterion is a modified version of the original Carpinteri-Spagnoli (C-S) criterion. The proposed modifications are related to: the weighting procedure of the principal stress axes; the definition of the equivalent normal stress by taking into account the mean normal stress effect; the expression of the quadratic combination of stresses. Several high-cyle fatigue strength results for smooth metallic specimens, subjected to in-phase or out-of-phase biaxial loading with different loading ratios and mean stress values, are analysed by employing the C-S criterion, its modified version, and other criteria available in the literature.
2010
Proceedings of the 9th International Conference on Multiaxial Fatigue & Fracture (ICMFF9)
9th International Conference on Multiaxial Fatigue & Fracture (ICMFF9)
Parma (Italy)
7-10 June 2010
CARPINTERI, Andrea; BRIGHENTI, Roberto; SPAGNOLI, Andrea; VANTADORI, Sabrina
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1328192
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