Abstract
A new critical plane-energy model is proposed in this paper for multiaxial fatigue life prediction of metals. A brief review of existing methods, especially on the critical plane-based and energy-based methods, is given first. Special focus is on the Liu–Mahadevan critical plane approach, which has been shown to work for both brittle and ductile metals. One potential drawback of the Liu–Mahadevan model is that it needs an empirical calibration parameter for non-proportional multiaxial loadings because only the strain terms are used and the out-of-phase hardening cannot be explicitly considered. An energy-based model using the Liu–Mahadevan concept is proposed with the help of the Mróz–Garud plasticity model. Thus, the empirical calibration for non-proportional loading is not needed because the out-of-phase hardening is naturally included in the stress calculation. The model predictions are compared with experimental data from open literature, and the proposed model is shown to work for both proportional and non-proportional multiaxial loadings without the empirical calibration.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1973-1983 |
| Number of pages | 11 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 40 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 1 2017 |
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Keywords
- critical plane
- energy
- life prediction
- multiaxial fatigue
- non-proportional loading
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
A critical plane-energy model for multiaxial fatigue life prediction. / Wei, H.; Liu, Yongming.
In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 40, No. 12, 01.12.2017, p. 1973-1983.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A critical plane-energy model for multiaxial fatigue life prediction
AU - Wei, H.
AU - Liu, Yongming
PY - 2017/12/1
Y1 - 2017/12/1
N2 - A new critical plane-energy model is proposed in this paper for multiaxial fatigue life prediction of metals. A brief review of existing methods, especially on the critical plane-based and energy-based methods, is given first. Special focus is on the Liu–Mahadevan critical plane approach, which has been shown to work for both brittle and ductile metals. One potential drawback of the Liu–Mahadevan model is that it needs an empirical calibration parameter for non-proportional multiaxial loadings because only the strain terms are used and the out-of-phase hardening cannot be explicitly considered. An energy-based model using the Liu–Mahadevan concept is proposed with the help of the Mróz–Garud plasticity model. Thus, the empirical calibration for non-proportional loading is not needed because the out-of-phase hardening is naturally included in the stress calculation. The model predictions are compared with experimental data from open literature, and the proposed model is shown to work for both proportional and non-proportional multiaxial loadings without the empirical calibration.
AB - A new critical plane-energy model is proposed in this paper for multiaxial fatigue life prediction of metals. A brief review of existing methods, especially on the critical plane-based and energy-based methods, is given first. Special focus is on the Liu–Mahadevan critical plane approach, which has been shown to work for both brittle and ductile metals. One potential drawback of the Liu–Mahadevan model is that it needs an empirical calibration parameter for non-proportional multiaxial loadings because only the strain terms are used and the out-of-phase hardening cannot be explicitly considered. An energy-based model using the Liu–Mahadevan concept is proposed with the help of the Mróz–Garud plasticity model. Thus, the empirical calibration for non-proportional loading is not needed because the out-of-phase hardening is naturally included in the stress calculation. The model predictions are compared with experimental data from open literature, and the proposed model is shown to work for both proportional and non-proportional multiaxial loadings without the empirical calibration.
KW - critical plane
KW - energy
KW - life prediction
KW - multiaxial fatigue
KW - non-proportional loading
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U2 - 10.1111/ffe.12614
DO - 10.1111/ffe.12614
M3 - Article
VL - 40
SP - 1973
EP - 1983
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 12
ER -