REVIEW ARTICLE


Relations between the S-N, ε-N and da/dN-ΔK Curves of Materials



Hai-Jun Shen*, 1, Wan-Lin Guo1, Jun-Feng Ma 1, Bao-Tian Zhu 2
1 School of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2 Thermal Engineering Academy of the Ministry of Electric Power, Xi'an 710032, China

Article Information


Identifiers and Pagination:

Year: 2009
Volume: 3
First Page: 35
Last Page: 42
Publisher Id: TOMEJ-3-35
DOI: 10.2174/1874155X00903010035

Article History:

Received Date: 17/11/2008
Revision Received Date: 27/01/2009
Acceptance Date: 03/02/2009
Electronic publication date: 13/5/2009
Collection year: 2009

© 2009Shen et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; Tel: +86-25-84895809; E-mail: shj@nuaa.edu.cn


Abstract

The S-N, ε-N and da/dN-ΔK curves are the basic data of fatigue property for materials, and they are used in the stress-life method, the local strain method and the LEFM (Linear elastic fracture mechanics) crack propagation method to predict fatigue life of structures, respectively. In the present paper, the relations between these fatigue curves and their probability of predicting each other were discussed through several fatigue-life models. The discussed subjects include (1) predicting the S-N curves from the da/dN-ΔK curves of materials, (2) predicting the S-N curves from the ε-N curves, and (3) predicting the da/dN-ΔK curves from the ε-N curves. It is shown that there are certain relations between the S-N, ε-N and da/dN-ΔK curves of materials and it is predictable from one curve to another.

Keywords: da/dN-ΔK curve, ε-N, S-N curve, relation.