Evaluation of initial fatigue growth behavior for surface-cracks

DOI

10.2991/ismems-17.2018.3How to use a DOI?

Keywords

Surface-cracks; FEM analysis; stress intensity factor; fatigue growth; residual stress of pressure

Abstract

In order to predict the remaining life of the surface-cracks in the mechanical component, a method to evaluate the stress intensity factor of the crack tip is proposed. In this paper, finite element simulation is firstly used to evaluate stress intensity factor KFEM of the crack under different load and sizes. The KFEM is compared with K calculated by Newman-Raju equation for the same crack. The evaluation results of KFEM are basically same with K that calculated by the previous empirical formula, which verifies the reliability of the evaluation method. During the process of initial fatigue growth, stress intensity factor Kest at the end of the surface-cracks is investigated by experiment. In results, the stress intensity factor proposed in this paper is efficacious for surface-cracks with residual stress, even though the load applied to surface-cracks and crack depth are unknown.

Copyright

© 2018, 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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TY  - CONF
AU  - Youli Ma
AU  - Rongjuan Li
PY  - 2017/11
DA  - 2017/11
TI  - Evaluation of initial fatigue growth behavior for surface-cracks
BT  - Proceedings of the International Symposium on Mechanical Engineering and Material Science (ISMEMS 2017)
PB  - Atlantis Press
SP  - 11
EP  - 15
SN  - 2352-5401
UR  - https://doi.org/10.2991/ismems-17.2018.3
DO  - 10.2991/ismems-17.2018.3
ID  - Ma2017/11
ER  -