Fatigue behaviour of EA4T notched specimens: experiments and predictions using the theory of critical distance

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Liao, D (Author) Other; Gao, JW (Author) Other; Zhu, SP (Author) Other; Correia, J (Author) FEUP; Abilio M P De Jesus (Author) FEUP; Rui Calçada (Author) FEUP

Journal

Title: Engineering Fracture Mechanics

Vol. 286

ISSN: 0013-7944

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 1 Citation

Other information

Authenticus ID: P-00Y-E49

DOI: 10.1016/j.engfracmech.2023.109269

Abstract (EN): As a fatigue-sensitive component, the reliability of railway axles is critical for the safe service of high-speed trains. Fatigue is a localized process involving the nucleation and growth of cracks to failure, especially sensitive to local geometrical discontinuities. Unfortunately, in the manufacturing, operation and maintenance of railway axles, some kinds of microscopic notches are inevitably introduced. Therefore, it is important to study the notch effect on the fatigue performances of railway axle steels. Accordingly, rotating bending fatigue tests of smooth and notched specimens were conducted, in consistency with the actual service load pattern of railway axles. Finally, the theory of critical distance (TCD) was introduced for studying the fatigue behaviour of different specimens, which correlates the S-N curves of three kinds of specimens well when regarding the critical distance as a life dependent variable.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 23