Fatigue design of structural components under multiaxial loading often relies on fatigue life calculations based on a post-processing of the full-field elastic stress/strain maps obtained from finite element (FE) analysis. In the present article, a post-processing tool is adopted to compute the fatigue life of a structural component, and multiaxial fatigue assessment is carried out by considering different criteria such as that of Smith-Watson-Topper and of Fatemi-Socie. The present paper focuses on a specific structural component related to a quarter-turn heavy-duty valve actuator, called scotch yoke, commonly used in many application sectors such as oil & gas, power and chemical industries. The fatigue assessment of the component is carried out by employing a full-model FE analysis, considering fillet-welded joints exposed to in-phase constant amplitude cyclic bending-torsion fatigue load with load ratio R=-1, with applied maximum load according to EN 15714-3, which is the standard in the valve actuator sector. The elastic stress/strain field extracted from the FE model is used to perform the fatigue assessment of the fillet-welded joints, where the potential fatigue crack initiation points (weld toe and weld root) are described by adopting an effective radius at the weld notches.

FULL-MODEL MULTIAXIAL FATIGUE LIFE CALCULATIONS WITH DIFFERENT CRITERIA / Pellinghelli, D.; Riboli, M.; Spagnoli, A.. - In: PROCEDIA ENGINEERING. - ISSN 1877-7058. - 213:(2018), pp. 126-136. (Intervento presentato al convegno 7th International Conference on Fatigue Design, Fatigue Design 2017 tenutosi a Senlis, France nel 29-30 November 2017) [10.1016/j.proeng.2018.02.014].

FULL-MODEL MULTIAXIAL FATIGUE LIFE CALCULATIONS WITH DIFFERENT CRITERIA

Riboli, M.;Spagnoli, A.
2018-01-01

Abstract

Fatigue design of structural components under multiaxial loading often relies on fatigue life calculations based on a post-processing of the full-field elastic stress/strain maps obtained from finite element (FE) analysis. In the present article, a post-processing tool is adopted to compute the fatigue life of a structural component, and multiaxial fatigue assessment is carried out by considering different criteria such as that of Smith-Watson-Topper and of Fatemi-Socie. The present paper focuses on a specific structural component related to a quarter-turn heavy-duty valve actuator, called scotch yoke, commonly used in many application sectors such as oil & gas, power and chemical industries. The fatigue assessment of the component is carried out by employing a full-model FE analysis, considering fillet-welded joints exposed to in-phase constant amplitude cyclic bending-torsion fatigue load with load ratio R=-1, with applied maximum load according to EN 15714-3, which is the standard in the valve actuator sector. The elastic stress/strain field extracted from the FE model is used to perform the fatigue assessment of the fillet-welded joints, where the potential fatigue crack initiation points (weld toe and weld root) are described by adopting an effective radius at the weld notches.
2018
FULL-MODEL MULTIAXIAL FATIGUE LIFE CALCULATIONS WITH DIFFERENT CRITERIA / Pellinghelli, D.; Riboli, M.; Spagnoli, A.. - In: PROCEDIA ENGINEERING. - ISSN 1877-7058. - 213:(2018), pp. 126-136. (Intervento presentato al convegno 7th International Conference on Fatigue Design, Fatigue Design 2017 tenutosi a Senlis, France nel 29-30 November 2017) [10.1016/j.proeng.2018.02.014].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2849417
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