Establishment of the Fatigue Curve Model Based on Stress Ratio

DOI

10.2991/iccset-14.2015.16How to use a DOI?

Keywords

Stress Ratio, Fatigue Life, Fatigue Limit, R-S-N Mathematical Models

Abstract

Stress ratio has important effect on fatigue performance. For the influence of stress ratio o fatigue life, fatigue tests of Titanium alloy produced by rapid manufacturing(Ti alloy by RM) samples were carried out under three kinds of stress ratio( R=0.5?R=0.06?R=-1), to draw three fatigue limits and 3 S-N curves of “stress amplitude life model ”. Based on the integral relationship of the crack growth rate and fatigue life, considering both of mathematical models of fatigue life, a systematic investigation of the relationship between stress ratio (R) and fatigue life curve (S-N) was performed to build the fatigue life mathematical mode (R-S-N). According to the modified formula proposed in this paper, the establishment of R-S-N mathematical models, applicable for Ti alloy by RM materials. The result showed that “stress amplitude” model can accurately predict moderate fatigue life. The predictive value of proposed R-S-N mathematical models were in better agreement with the experimental values, it can accurately predict the fatigue curve under any stress ratio in engineering.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Liang Zhu
AU  - Yiliang Zhang
AU  - Xiaohui Li
AU  - Hongbo Suo
PY  - 2015/01
DA  - 2015/01
TI  - Establishment of the Fatigue Curve Model Based on Stress Ratio
BT  - Proceedings of the 2014 International Conference on Computer Science and Electronic Technology
PB  - Atlantis Press
SP  - 71
EP  - 75
SN  - 2352-538X
UR  - https://doi.org/10.2991/iccset-14.2015.16
DO  - 10.2991/iccset-14.2015.16
ID  - Zhu2015/01
ER  -