フレッティング疲労におよぼす接触形状の影響

概要

論文の詳細を見る
Fretting fatigue tests under two types of fretting contacts, flat/flat and flat/cylinder, were carried out in order to investigate the effect of contact pad geometry and contact pressure distribution on fretting fatigue behavior. By changing the mean contact pressure level from 30 MPa to 1.5 GPa, the effect of the mean contact pressure on fretting fatigue properties was also investigated. The main results obtained are as follows. In the case of flat/cylinder contact, the configuration of contact pad was changed by cyclic wear with repeated fretting cycles. The mean contact pressure calculated using actual contact width is useful to evaluate the fretting fatigue properties, similarly to the case of flat/flat contact. Fretting fatigue strength and fatigue life decreased with increasing mean contact pressure and attained a constant value when the mean contact pressure was higher than about 100 MPa. Frictional force is one of the dominant factors affecting fretting fatigue properties as well as stress amplitude. The proposed fretting stress amplitude which is calculated using stress amplitude and frictional force amplitude is an effective parameter to evaluate the fretting fatigue life.
一般社団法人日本機械学会の論文
1995-07-25