A quantitative approach to evaluate fretting fatigue limit using a pre-cracked specimen

作者：Kubota Masanobu^*; Kataoka Shunsuke; Takazaki Daisuke; Kondo Yoshiyuki

来源：Tribology International, 2017, 108: 48-56.

DOI：10.1016/j.triboint.2016.10.017

• Fretting
• Fatigue
• Fracture mechanics

A pre-cracked specimen, which has a 70-mu m-deep crack, was used for the fretting fatigue test to understand the reasons for the change in the fretting fatigue limit due to changes in the contact pressure, position of the pre-crack, and foot length of the contact pad. The threshold stress intensity factor range to crack propagation of the pre-crack, Delta K-th, was obtained by the crack growth test. The stress intensity factor range of the pre-crack under fretting conditions was then evaluated by a finite element analysis to estimate the fretting fatigue limit of the pre-crack specimen. The effects of these variables on the fretting fatigue limit were quantitatively explained by the results of the FEM and Delta K-th of the short crack.

• 出版日期2017-4