On the Use of the Method of Multistage Loading for Computational and Experimental Evaluation of the Contact Endurance Limit

Abstract

The possibility of applying the method of multistage loading (Lokati) is considered for the calculation and experimental evaluation of the contact endurance limit. The results of applying the Lokati method to determine the median contact endurance limit of specimens made of aluminum alloy Д16 (D16) and 0.45% carbon steel are analyzed. The tests were carried out according to the scheme “shaft — roller” in rolling conditions without slipping. The criteria for reaching the limit state, the parameters of the multistage loading mode were varied. It is shown that the Lokati method and its basis, the hypothesis of linear accumulation of fatigue damage, make it possible to satisfactorily assess the value of the contact endurance limit of the studied materials.

Keywords

• rolling-contact fatigue
• durability
• tests
• endurance limit
• multistage loading method