Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
FATIGUE STUDY OF NOTCHED COMPONENTS IN THE FREQUENCY-DOMAIN
Submission Author:
diego sarzosa , SP , Brazil
Co-Authors:
diego sarzosa
Presenter: diego sarzosa
doi://10.26678/ABCM.MECSOL2022.MSL22-0010
Abstract
Structures are built up to support a variety of in-service loading specific to their function. Random vibration is observed in most structural components in many areas such as offshore, aerospace, civil and automotive industries. Fatigue life prediction plays a key role for verifying the design and assessing the structural integrity during service. The fatigue damage is commonly calculated by a linear rule proposed by Palmgrem-Miner. The scatter of fatigue testing data suggests that a probabilistic characterization of the material resistance should be considered during fatigue life calculations. In this work, the inherent uncertainties of the fatigue phenomenon and the influence of a notch are studied in the fatigue life prediction of a component subjected to random loading. The fatigue life estimated using the Dirlik's frequency domain counting method is compared with the experimental random tests. The agreement is good after setting correctly the structural damping ratio $\zeta$ and the so-called fatigue notch factor $k_f$.
Keywords
Frequency Spectrum, Frequency response functions (FRFs), Damage, Fatigue estimation methods
