Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
Multiaxial fatigue of steels with small defects
Submission Author:
Pedro Vinícius Sousa Machado , DF
Co-Authors:
Pedro Vinícius Sousa Machado, JOSE ALEXANDER ARAUJO, Edgard Soares Pinto Neto
Presenter: Pedro Vinícius Sousa Machado
doi://10.26678/ABCM.MECSOL2019.MSL19-0060
Abstract
The goal of this research is to investigate the detrimental effect of artificial small holes on the fatigue strength of steel under multiaxial loading conditions. Such holes are said to simulate the presence of non-metallic inclusions, which are chemical compounds that appear during the manufacturing processes due to several reasons such as contamination and are known to be detrimental to the fatigue strength, as they behave as stress concentration elements. Therefore, to consider this effect in a multiaxial problem a correction to the Modified Wöhler Curve Model (MWCM) is going to be proposed. The correction is based on the parameter “square root of area” investigated by Murakami (1994), and to acess it, experimental multiaxial fatigue data available in the literature were considered. The results show good agreement between the proposed model and the experiments of multiaxial fatigue of steels containing small artificial holes simulating nonmetallic inclusions.
Keywords
nonmetallic inclusions, defective materials, multiaxial fatigue, small defects
