Fatigue life prediction of notched components under size effect using critical distance theory

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Ye, WL (Author) Other; Zhu, SP (Author) Other; Niu, XP (Author) Other; He, JC (Author) Other; Correia, JAFO (Author) FEUP

Journal

Title: Theoretical and Applied Fracture Mechanics

Vol. 121

ISSN: 0167-8442

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00X-0XF

DOI: 10.1016/j.tafmec.2022.103519

Abstract (EN): Notch and size effects have shown significant influences on fatigue performance of engineering components, which deserve special attentions when performing structural health assessment. Thus, a possible size effect on critical distance is identified, when evaluating fatigue lives of notched specimens using the theory of critical distance.. In this work, by introducing the relative stress gradient concept, a novel reformulation of critical distance theory is proposed to consider the size effect in notch fatigue analysis. Experimental data of GH4169 Ni-based alloy, Al 2024-T351 alloy, and En3B low carbon steel notched specimens are applied for model validation and comparison. Results indicate that all predicted lives based on the proposed method agree well with the experimental values.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10