Surface roughness effect on fatigue strength of aluminum alloy using revised stress field intensity approach.

ABSTRACT: The fatigue strength of a component is known to highly depend on its surface quality, and it is thus necessary to develop a reliable and appropriate mathematical model for fatigue strength assessment that consider the effect of surface roughness. In this paper, different underlying physical mechanisms of the roughness effect at different regions of specimens were studied by fatigue testing of 7N01 aluminum alloy. For a quantitative analysis of the surface roughness effect, a revised stress field intensity approach for a fatigue strength assessment of microsized notches was proposed as a theoretical support. In the new model, a new form of weight function was built to adapt the characteristics of microsized notches. In addition, the effect of the field radius was fundamentally weakened on s

SUBMITTER: Zhao B 

PROVIDER: S-EPMC8481500 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature