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다축응력 성분간의 위상차를 고려한 등가본미세스응력을 이용한 피로수명예측

Fatigue Life Prediction with Equivalent von Mises Stress Considering the Phase Difference between Multi-Axial Stress Components

Journal of the Korean Society for Precision Engineering 2018;35(5):515-520.
Published online: May 1, 2018

1 인제대학교 기계공학과

2 인제대학교 고안전차량핵심기술연구소

1 Department of Mechanical Engineering, Inje University

2 High Safety Vehicle Technology Research Center, Inje University

#E-mail: mechhsk@inje.ac.kr, TEL: +82-55-320-3748
• Received: October 1, 2016   • Revised: December 15, 2017   • Accepted: January 4, 2018

Copyright © The Korean Society for Precision Engineering

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fatigue Life Prediction with Equivalent von Mises Stress Considering the Phase Difference between Multi-Axial Stress Components
J. Korean Soc. Precis. Eng.. 2018;35(5):515-520.   Published online May 1, 2018
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Fatigue Life Prediction with Equivalent von Mises Stress Considering the Phase Difference between Multi-Axial Stress Components
J. Korean Soc. Precis. Eng.. 2018;35(5):515-520.   Published online May 1, 2018
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Fatigue Life Prediction with Equivalent von Mises Stress Considering the Phase Difference between Multi-Axial Stress Components
Image Image Image Image Image Image Image
Fig. 1 von-Mises stress for in-phase
Fig. 2 L-Shaft steel plate
Fig. 3 S-N curve of fatigue model
Fig. 4 PSD of multi-axial stress in target element
Fig. 5 Comparison of equivalent stress PSD
Fig. 6 Damage map of critical areas
Fig. 7 Equivalent von-Mises PSDs with two methods
Fatigue Life Prediction with Equivalent von Mises Stress Considering the Phase Difference between Multi-Axial Stress Components

Material properties of L-shaft steel plate

Property Unit Value
Young’s modulus GPa 205
Poisson’s ratio - 0.29
Density kg/m3 7850
Modal damping - 0.1
Thickness mm 0.5

Material parameters of fatigue model

Property Symbol Value
Material constants m 9.82
Material constants K 4.0641 × 1088

EFL of five critical areas

EFL Equi. von-Mises Multi-Axial rainflow Error(%)
1 3.76 × 108 3.97 × 108 5.38
2 3.73 × 108 3.93 × 108 5.05
3 3.65 ×108 3.89 × 108 6.13
4 3.59 × 108 3.87 × 108 7.2
5 3.58 × 108 3.86 × 108 7.23
Table 1 Material properties of L-shaft steel plate
Table 2 Material parameters of fatigue model
Table 3 EFL of five critical areas