Abstract
Fatigue life in critical parts of structure components, which is subjected to variable amplitude loading, is a very complex subject. When a fatigue life is influenced by these load variations, accelerations and/or retardations in crack growth rate can occur. Thus, an accurate prediction of fatigue life requires an adequate evaluation of these stress interaction effects. There are many different indexes for calculating fatigue damage at critical locations. The crack severity index based on crack growth is one of the methodologies implemented for modern military aircrafts to define mission severity relative to a known reference usage. But, this index cannot consider stress interaction. In this study, a novel index was proposed to evaluate an effect for stress interaction by using entropy concept, and fatigue life prediction methodology was developed by using entropy index of stress interaction and crack severity index of effective stress.
| Original language | English |
|---|---|
| Pages (from-to) | 375-392 |
| Number of pages | 18 |
| Journal | International Journal of Damage Mechanics |
| Volume | 22 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2013 Apr 1 |
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Keywords
- entropy index for damage
- extended finite element method
- fatigue life prediction
- multiple-site damage
- stress interaction effect
- stress spectrum
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
- Computational Mechanics
Cite this
Fatigue life prediction methodology using entropy index of stress interaction and crack severity index of effective stress. / Kim, Junghoon; Yi, Jio; Kim, Jihwan; Zi, Goangseup; Kong, Jun g Sik.
In: International Journal of Damage Mechanics, Vol. 22, No. 3, 01.04.2013, p. 375-392.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fatigue life prediction methodology using entropy index of stress interaction and crack severity index of effective stress
AU - Kim, Junghoon
AU - Yi, Jio
AU - Kim, Jihwan
AU - Zi, Goangseup
AU - Kong, Jun g Sik
PY - 2013/4/1
Y1 - 2013/4/1
N2 - Fatigue life in critical parts of structure components, which is subjected to variable amplitude loading, is a very complex subject. When a fatigue life is influenced by these load variations, accelerations and/or retardations in crack growth rate can occur. Thus, an accurate prediction of fatigue life requires an adequate evaluation of these stress interaction effects. There are many different indexes for calculating fatigue damage at critical locations. The crack severity index based on crack growth is one of the methodologies implemented for modern military aircrafts to define mission severity relative to a known reference usage. But, this index cannot consider stress interaction. In this study, a novel index was proposed to evaluate an effect for stress interaction by using entropy concept, and fatigue life prediction methodology was developed by using entropy index of stress interaction and crack severity index of effective stress.
AB - Fatigue life in critical parts of structure components, which is subjected to variable amplitude loading, is a very complex subject. When a fatigue life is influenced by these load variations, accelerations and/or retardations in crack growth rate can occur. Thus, an accurate prediction of fatigue life requires an adequate evaluation of these stress interaction effects. There are many different indexes for calculating fatigue damage at critical locations. The crack severity index based on crack growth is one of the methodologies implemented for modern military aircrafts to define mission severity relative to a known reference usage. But, this index cannot consider stress interaction. In this study, a novel index was proposed to evaluate an effect for stress interaction by using entropy concept, and fatigue life prediction methodology was developed by using entropy index of stress interaction and crack severity index of effective stress.
KW - entropy index for damage
KW - extended finite element method
KW - fatigue life prediction
KW - multiple-site damage
KW - stress interaction effect
KW - stress spectrum
UR - http://www.scopus.com/inward/record.url?scp=84875694963&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875694963&partnerID=8YFLogxK
U2 - 10.1177/1056789512448803
DO - 10.1177/1056789512448803
M3 - Article
VL - 22
SP - 375
EP - 392
JO - International Journal of Damage Mechanics
JF - International Journal of Damage Mechanics
SN - 1056-7895
IS - 3
ER -