Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

Materials

Ricardo Branco¹  Mirosław Szala²  Zbigniew Marciniak³  Robert Ulewicz⁴  Norbert Sczygiol⁵  Wojciech Macek⁶  Piotr Kardasz⁷ 

[1] CEMMPRE, Department of Mechanical Engineering, University of Coimbra, Rua Luís Santos, 3030-788 Coimbra, Portugal;Department of Materials Engineering, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36D, 20-618 Lublin, Poland;Department of Mechanics and Machine Design, Opole University of Technology, ul. Mikolajczyka 5, 45-271 Opole, Poland;Department of Production Engineering and Safety, Czestochowa University of Technology, 42-201 Czestochowa, Poland;Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, 42-201 Czestochowa, Poland;Opole University of Technology, 76 Proszkowska St., 45-758 Opole, Poland;Wroclaw School of Information Technology, Lutra 4, 54-239 Wrocław, Poland;

关键词: surface metrology;    surface topography;    bending–torsion fatigue;    fatigue fracture;   

DOI  :  10.3390/ma13173691

来源: DOAJ

【 摘 要 】

Post-mortem characterisation is a pivotal tool to trace back to the origin of structural failures in modern engineering analyses. This work compared both the crack propagation and rupture roughness profiles based on areal parameters for total fracture area. Notched and smooth samples made of weather-resistant structural steel (10HNAP), popular S355J2 structural steel and aluminium alloy AW-2017A under bending, torsion and combined bending–torsion were investigated. After the fatigue tests, fatigue fractures were measured with an optical profilometer, and the relevant surface parameters were critically compared. The results showed a great impact of the loading scenario on both the local profiles and total fracture areas. Both approaches (local and total fracture zones) for specimens with different geometries were investigated. For all specimens, measured texture parameters decreased in the following order: total area, rupture area and propagation area.

【 授权许可】

Unknown