Strain energy-based fatigue life prediction under variable amplitude loadings

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Shun-Peng (Author) Other; Peng Yue (Author) Other; José Correia (Author) FEUP; Sergio Blason (Author) Other; Abílio M. P. de Jesus (Author) FEUP; Qingyuan Wang (Author) Other

Journal

Title: Structural Engineering and Mechanics

Vol. 66 No. 2

Pages: 151-160

ISSN: 1225-4568

Publisher: Korea Advanced Institute of Science and Technology

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 17 Citations

Other information

Authenticus ID: P-00N-YRB

DOI: 10.12989/sem.2018.66.2.151

Abstract (EN): With the aim to evaluate the fatigue damage accumulation and predict the residual life of engineering components under variable amplitude loadings, this paper proposed a new strain energy-based damage accumulation model by considering both effects of mean stress and load interaction on fatigue life in a low cycle fatigue (LCF) regime. Moreover, an integrated procedure is elaborated for facilitating its application based on S-N curve and loading conditions. Eight experimental datasets of aluminum alloys and steels are utilized for model validation and comparison. Through comparing experimental results with model predictions by the proposed, Miner's rule, damaged stress model (DSM) and damaged energy model (DEM), results show that the proposed one provides more accurate predictions than others, which can be extended for further application under multi-level stress loadings.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10