Details
| Original language | English |
|---|---|
| Pages (from-to) | 1944-1961 |
| Number of pages | 18 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 47 |
| Issue number | 6 |
| Publication status | Published - 2 May 2024 |
Abstract
In this paper, the SWT model was improved by incorporating the Walker equation into the strain–life curve. The established model takes into account the material's sensitivity to mean stress by introducing the Walker exponent, w. Under uniaxial loading condition, the proposed model can reduce to the SWT model, Manson-Coffin equation, and Walker model for w values of 0.5, 1, and 0, respectively. Under multiaxial symmetric loading, when w = 0.5, the proposed model can be simplified as another SWT correction model (CXH) proposed by Chen et al. The prediction accuracy of the established model was validated using about 200 data points collected from literature. These data points were obtained from tests conducted on eight different kinds of metals under various multiaxial loading paths. The verification results indicate that 96.8% and 97.9% of the data points fall within the factor-of-three boundary for the loading paths without and with mean stresses, respectively.
Keywords
- fatigue life prediction, multiaxial cyclic loading, strain energy density, SWT model, Walker exponent
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 47, No. 6, 02.05.2024, p. 1944-1961.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Multiaxial fatigue life prediction using an improved Smith-Watson-Topper model
AU - Li, Jing
AU - Shao, Feng shan
AU - He, Zheng wei
AU - Ma, Juan
AU - Qiu, Yuan ying
AU - Beer, Michael
N1 - Publisher Copyright: © 2024 John Wiley & Sons Ltd.
PY - 2024/5/2
Y1 - 2024/5/2
N2 - In this paper, the SWT model was improved by incorporating the Walker equation into the strain–life curve. The established model takes into account the material's sensitivity to mean stress by introducing the Walker exponent, w. Under uniaxial loading condition, the proposed model can reduce to the SWT model, Manson-Coffin equation, and Walker model for w values of 0.5, 1, and 0, respectively. Under multiaxial symmetric loading, when w = 0.5, the proposed model can be simplified as another SWT correction model (CXH) proposed by Chen et al. The prediction accuracy of the established model was validated using about 200 data points collected from literature. These data points were obtained from tests conducted on eight different kinds of metals under various multiaxial loading paths. The verification results indicate that 96.8% and 97.9% of the data points fall within the factor-of-three boundary for the loading paths without and with mean stresses, respectively.
AB - In this paper, the SWT model was improved by incorporating the Walker equation into the strain–life curve. The established model takes into account the material's sensitivity to mean stress by introducing the Walker exponent, w. Under uniaxial loading condition, the proposed model can reduce to the SWT model, Manson-Coffin equation, and Walker model for w values of 0.5, 1, and 0, respectively. Under multiaxial symmetric loading, when w = 0.5, the proposed model can be simplified as another SWT correction model (CXH) proposed by Chen et al. The prediction accuracy of the established model was validated using about 200 data points collected from literature. These data points were obtained from tests conducted on eight different kinds of metals under various multiaxial loading paths. The verification results indicate that 96.8% and 97.9% of the data points fall within the factor-of-three boundary for the loading paths without and with mean stresses, respectively.
KW - fatigue life prediction
KW - multiaxial cyclic loading
KW - strain energy density
KW - SWT model
KW - Walker exponent
UR - http://www.scopus.com/inward/record.url?scp=85188439739&partnerID=8YFLogxK
U2 - 10.1111/ffe.14285
DO - 10.1111/ffe.14285
M3 - Article
AN - SCOPUS:85188439739
VL - 47
SP - 1944
EP - 1961
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 6
ER -