The fatigue behavior and mechanism of FV520B-I with large surface roughness in a very high cycle regime |
| |
| Affiliation: | 1. School of Mechanical Engineering, Shandong University, 17923 Jingshi Road, Jinan 250061, China;2. School of Mechanical & Automotive Engineering, Qilu University of Technology, 3501 Daxue Road, Jinan 250353, China;3. Engineering and Technology Research Center for Special Equipment Safety of Shandong Province, 17923 Jingshi Road, Jinan 250061, China;4. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, 17923 Jingshi Road, Jinan 250061, China;1. Department of Mechanical Engineering, Vilnius Gediminas Technical University, Basanavičiaus str. 28, Vilnius LT-03224, Lithuania;2. Department of Automobile Transport, Vilnius Gediminas Technical University, Basanavičiaus str. 28, Vilnius LT-03224, Lithuania;1. School of Mechanical Engineering, Dalian University of Technology, 116024, China;2. Department of Industrial Engineering, Texas Tech University, Lubbock, TX 79409, USA |
| |
| Abstract: | The fatigue properties of FV520B-I up to 109 cycles when the surface roughness Ra ≈ 0.6 were tested and compared with two groups of previously obtained test results. The test results showed that the S-N curve continuously moved downward and the transition stress at which the crack origin changed from the surface to the subsurface decreased with an increase of surface roughness, and the conventional fatigue limit finally appeared. The initiation mechanism of subsurface cracks in a very high cycle fatigue regime was independent of surface roughness. The surface fatigue limit and the high cycle fatigue life were predicted by relevant models. The competition mechanism between surface cracking and subsurface cracking was further discussed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
