Proceedings of the 2014 International Conference on Computer Science and Electronic Technology

Establishment of the Fatigue Curve Model Based on Stress Ratio

Authors
Liang Zhu, Yiliang Zhang, Xiaohui Li, Hongbo Suo
Corresponding Author
Liang Zhu
Available Online January 2015.
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/).

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Volume Title
Proceedings of the 2014 International Conference on Computer Science and Electronic Technology
Series
Advances in Computer Science Research
Publication Date
January 2015
ISBN
10.2991/iccset-14.2015.16
ISSN
2352-538X
DOI
10.2991/iccset-14.2015.16How to use a DOI?
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/).

Cite this article

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  -